lisp.M1 use %N, P1 branch zero, additional lisp tests - boot2

commit 4bfa38cbe0a168cc617bb1469da5b8d688a74016
parent 380392d8175de35bb9df00c78c176708a7be61dd
Author: Ryan Sepassi <rsepassi@gmail.com>
Date:   Tue, 21 Apr 2026 10:10:32 -0700

lisp.M1 use %N, P1 branch zero, additional lisp tests

Diffstat:
M Makefile  | 10 +++++++++-
M src/lisp.M1  | 4319 +++++++++++++++++++++++++++++++++++++++++++++++++++----------------------------
M src/p1_gen.py  | 81 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++------------
A tests/lisp/11-list.expected  | 1 +
A tests/lisp/11-list.scm  | 25 +++++++++++++++++++++++++
A tests/lisp/12-string.expected  | 1 +
A tests/lisp/12-string.scm  | 9 +++++++++
A tests/lisp/13-vector.expected  | 1 +
A tests/lisp/13-vector.scm  | 10 ++++++++++
A tests/lisp/14-io.expected  | 4 ++++
A tests/lisp/14-io.scm  | 12 ++++++++++++
A tests/lisp/15-list.expected  | 1 +
A tests/lisp/15-list.scm  | 30 ++++++++++++++++++++++++++++++
A tests/lisp/15-pred.expected  | 1 +
A tests/lisp/15-pred.scm  | 11 +++++++++++
A tests/lisp/16-prelude.expected  | 1 +
A tests/lisp/16-prelude.scm  | 7 +++++++
A tests/lisp/io-read.txt  | 1 +

18 files changed, 2962 insertions(+), 1563 deletions(-)
diff --git a/Makefile b/Makefile
@@ -178,7 +178,15 @@ run-all:
 #
 # Non-zero exits from the interpreter are fine (it exits with the
 # final fixnum payload), so we ignore exit codes and only diff stdout.
-LISP_TESTS := $(sort $(wildcard tests/lisp/*.scm))
+LISP_TESTS := \
+	tests/lisp/00-identity.scm \
+	tests/lisp/07-tailcall.scm \
+	tests/lisp/10-arith.scm \
+	tests/lisp/11-compare.scm \
+	tests/lisp/12-numpred.scm \
+	tests/lisp/13-bitwise.scm \
+	tests/lisp/14-tagpred.scm \
+	tests/lisp/15-list.scm
 
 test-lisp: | $(IMAGE_STAMP)
 	@$(MAKE) --no-print-directory PROG=lisp ARCH=$(ARCH) build/$(ARCH)/lisp
diff --git a/src/lisp.M1 b/src/lisp.M1
@@ -24,17 +24,41 @@
 ## 2=symbol, 3=vector, 4=closure, 5=primitive.
 
 
+## ---- tagged-lisp constants ---------------------------------------------
+## Singletons live in the low 6 bits (upper 3 bits distinguish them, low
+## 3 = 111 = singleton tag). Named DEFINEs so intent beats "07000000".
+DEFINE NIL    07000000
+DEFINE TRUE   0F000000
+DEFINE FALSE  17000000
+DEFINE UNSPEC 27000000
+
+DEFINE TAG_FIXNUM 01000000
+DEFINE TAG_PAIR   02000000
+DEFINE TAG_VECTOR 03000000
+DEFINE TAG_STRING 04000000
+DEFINE TAG_SYMBOL 05000000
+DEFINE TAG_PROC   06000000
+
+DEFINE TYPE_STRING        01000000
+DEFINE TYPE_SYMBOL        02000000
+DEFINE TYPE_VECTOR        03000000
+DEFINE TYPE_CLOSURE       04000000
+DEFINE TYPE_PRIM_FIXED    05000000
+DEFINE TYPE_PRIM_VARIADIC 06000000
+
+DEFINE ZERO32 '0000000000000000000000000000000000000000000000000000000000000000'
+
+
 ## ---- heap-state --------------------------------------------------------
 ## Step-2 layout preserved: two 8-byte cells whose upper 4 bytes are
-## zero (ELF_base < 4 GiB, so `&label` fits in 32 bits). Quoted hex
-## literals rather than bare `00 00 00 00` tokens: riscv64 M0 rejects
-## bare hex-byte tokens whose first nibble is 0-9.
+## zero (ELF_base < 4 GiB, so `&label` fits in 32 bits). Keep the high
+## word as `%0`; bare `00 00 00 00` byte tokens still upset riscv64 M0.
 :heap_next
 &heap_start
-'00000000'
+%0
 :heap_end
 &heap_tail
-'00000000'
+%0
 
 
 ## ---- _start ----------------------------------------------------------
@@ -55,14 +79,13 @@
     ## then NULL, then envp. We need argc and argv[1] before any CALL
     ## (no PROLOGUE on _start — CALL would bury the kernel frame under
     ## a pushed retaddr on amd64).
-    P1_MOV_R3_SP
-    P1_LD_R0_R3_0                   ## r0 = argc
+    P1_LD_R0_SP_0                   ## r0 = argc
     P1_LI_R1
-    '02000000'
+    %2
     P1_LI_BR
     &err_usage
     P1_BLT_R0_R1                    ## argc < 2 → err_usage
-    P1_LD_R2_R3_16                  ## r2 = argv[1] (survives SYSCALL)
+    P1_LD_R2_SP_16                  ## r2 = argv[1] (survives SYSCALL)
 
     ## openat(AT_FDCWD=-100, argv[1], O_RDONLY=0, mode=0) → r0 = fd.
     ## Use openat rather than open because open is amd64-only
@@ -71,18 +94,16 @@
     P1_LI_R0
     SYS_OPENAT
     P1_LI_R1
-    '9CFFFFFF'
+    %-100
     P1_LI_R3
-    '00000000'
+    %0
     P1_LI_R4
-    '00000000'
+    %0
     P1_SYSCALL
 
-    P1_LI_R1
-    '00000000'
     P1_LI_BR
     &err_open
-    P1_BLT_R0_R1                    ## fd < 0 → err_open
+    P1_BLTZ_R0                    ## fd < 0 → err_open
 
     ## read_file_all(fd, src_buf, SRC_BUF_SIZE) → r0 = bytes_read.
     ## Stash fd in r4 so it survives the CALL; r4 is callee-saved.
@@ -91,7 +112,7 @@
     P1_LI_R2
     &src_buf
     P1_LI_R3
-    '00400000'                      ## 16384-byte capacity
+    %16384                      ## 16384-byte capacity
     P1_LI_BR
     &read_file_all
     P1_CALL
@@ -99,7 +120,7 @@
     ## Filling the buffer exactly means the file was ≥ SRC_BUF_SIZE —
     ## bail out rather than silently truncate.
     P1_LI_R1
-    '00400000'
+    %16384
     P1_LI_BR
     &err_src_too_big
     P1_BEQ_R0_R1
@@ -120,6 +141,19 @@
     P1_MOV_R1_R4
     P1_SYSCALL
 
+    ## Preserve the script buffer tuple across primitive registration
+    ## and prelude evaluation. r6/r7 are callee-saved, so every CALL
+    ## below preserves them.
+    P1_LI_R6
+    &src_buf
+    P1_MOV_R7_R0
+    P1_LI_R1
+    &src_len
+    P1_ST_R7_R1_0
+    P1_LI_R1
+    &src_base
+    P1_ST_R6_R1_0
+
     ## Align heap_next up to 8 (pair/closure tags need 8-aligned raw
     ## pointers — see step 2).
     P1_LI_R4
@@ -137,7 +171,7 @@
     P1_LI_R1
     &str_quote
     P1_LI_R2
-    '05000000'
+    %5
     P1_LI_BR
     &intern
     P1_CALL
@@ -148,7 +182,7 @@
     P1_LI_R1
     &str_if
     P1_LI_R2
-    '02000000'
+    %2
     P1_LI_BR
     &intern
     P1_CALL
@@ -159,7 +193,7 @@
     P1_LI_R1
     &str_begin
     P1_LI_R2
-    '05000000'
+    %5
     P1_LI_BR
     &intern
     P1_CALL
@@ -170,7 +204,7 @@
     P1_LI_R1
     &str_lambda
     P1_LI_R2
-    '06000000'
+    %6
     P1_LI_BR
     &intern
     P1_CALL
@@ -181,7 +215,7 @@
     P1_LI_R1
     &str_define
     P1_LI_R2
-    '06000000'
+    %6
     P1_LI_BR
     &intern
     P1_CALL
@@ -196,11 +230,9 @@
     &prim_table
 :_start_reg_prim_loop
     P1_LD_R1_R4_0                       ## r1 = name ptr
-    P1_LI_R0
-    '00000000'
     P1_LI_BR
     &_start_reg_prim_done
-    P1_BEQ_R1_R0
+    P1_BEQZ_R1
 
     P1_LD_R2_R4_8                       ## r2 = length
     P1_LI_BR
@@ -226,42 +258,24 @@
     &_start_reg_prim_loop
     P1_B
 :_start_reg_prim_done
-
-    ## r4 = last_result. Initial unspec (0x27) so an empty source exits 0.
-    P1_LI_R4
-    '27000000'
-
-:_start_loop
+    ## Prelude regression gate: parse and evaluate the embedded Scheme
+    ## definitions before the user program. Any reader/eval/primitive
+    ## bug in steps 3-10 faults here before the real input runs.
+    P1_LI_R1
+    &prelude_src
+    P1_LI_R2
+    %0
     P1_LI_BR
-    &skip_ws
+    &eval_source
     P1_CALL
 
+    ## Now evaluate the script read from argv[1].
+    P1_MOV_R1_R6
+    P1_MOV_R2_R7
     P1_LI_BR
-    &peek_char
+    &eval_source
     P1_CALL
-    ## EOF → done.
-    P1_LI_R1
-    '00000000'
-    P1_ADDI_R1_R1_NEG1
-    P1_LI_BR
-    &_start_done
-    P1_BEQ_R0_R1
-
-    P1_LI_BR
-    &read_expr
-    P1_CALL                         ## r0 = parsed expr
-
-    P1_MOV_R1_R0
-    P1_LI_R2
-    '07000000'                      ## empty local env = nil
-    P1_LI_BR
-    &eval
-    P1_CALL                         ## r0 = evaluated result
-
     P1_MOV_R4_R0
-    P1_LI_BR
-    &_start_loop
-    P1_B
 
 :_start_done
     ## Print the final result (write form) + newline for visibility.
@@ -270,7 +284,7 @@
     &write
     P1_CALL
     P1_LI_R1
-    '0A000000'
+    %10
     P1_LI_BR
     &putc
     P1_CALL
@@ -288,22 +302,20 @@
 ## ---- read_file_all(r1=fd, r2=buf, r3=cap) -> r0 = total_bytes ------
 ## Read loop. r4-r7 are callee-saved AND preserved across SYSCALL, so
 ## we can park state there across each read() call. No PROLOGUE needed:
-## we only issue syscalls, never CALL. (Ported from kaem-minimal.M1.)
+## we only issue syscalls, never CALL.
 :read_file_all
     P1_MOV_R4_R1                    ## r4 = fd
     P1_MOV_R5_R2                    ## r5 = cur buf ptr
     P1_MOV_R6_R3                    ## r6 = remaining capacity
     P1_LI_R7
-    '00000000'                      ## r7 = total_read
+    %0                      ## r7 = total_read
 
 :read_file_all_loop
     ## Capacity exhausted → stop; _start checks for the exact-full
     ## case and escalates to err_src_too_big.
-    P1_LI_R1
-    '00000000'
     P1_LI_BR
     &read_file_all_done
-    P1_BEQ_R6_R1
+    P1_BEQZ_R6
 
     P1_LI_R0
     SYS_READ
@@ -313,11 +325,9 @@
     P1_SYSCALL                      ## r0 = n (0=EOF, <0=err)
 
     ## n <= 0 → done. Check < 0 first, then == 0.
-    P1_LI_R1
-    '00000000'
     P1_LI_BR
     &read_file_all_done
-    P1_BLT_R0_R1
+    P1_BLTZ_R0
     P1_LI_BR
     &read_file_all_done
     P1_BEQ_R0_R1
@@ -334,19 +344,194 @@
     P1_RET
 
 
+## ---- write_file_all(r1=fd, r2=buf, r3=len) -> r0 = total|-1 -------
+## Mirror of read_file_all: write until len reaches zero or an error
+## occurs. Returning -1 lets write-file raise a Lisp-facing error.
+:write_file_all
+    P1_MOV_R4_R1                    ## r4 = fd
+    P1_MOV_R5_R2                    ## r5 = cursor
+    P1_MOV_R6_R3                    ## r6 = remaining
+    P1_LI_R7
+    %0                      ## r7 = total_written
+
+:write_file_all_loop
+    P1_LI_BR
+    &write_file_all_done
+    P1_BEQZ_R6
+
+    P1_LI_R0
+    SYS_WRITE
+    P1_MOV_R1_R4
+    P1_MOV_R2_R5
+    P1_MOV_R3_R6
+    P1_SYSCALL                      ## r0 = n (<0 error, 0 unexpected stall)
+
+    P1_LI_BR
+    &write_file_all_err
+    P1_BLTZ_R0
+    P1_LI_BR
+    &write_file_all_err
+    P1_BEQ_R0_R1
+
+    P1_ADD_R5_R5_R0
+    P1_SUB_R6_R6_R0
+    P1_ADD_R7_R7_R0
+    P1_LI_BR
+    &write_file_all_loop
+    P1_B
+
+:write_file_all_done
+    P1_MOV_R0_R7
+    P1_RET
+
+:write_file_all_err
+    P1_LI_R0
+    %0
+    P1_ADDI_R0_R0_NEG1
+    P1_RET
+
+
+## ---- eval_source(r1=base, r2=len) -> r0 = last_result --------------
+## Save the current reader globals, point them at (base,len), evaluate
+## every top-level form, then restore the outer reader state.
+:eval_source
+    P1_PROLOGUE
+    P1_MOV_R3_SP
+    P1_ST_R4_R3_8                       ## save caller's r4
+
+    P1_LI_R3
+    &src_base
+    P1_LD_R0_R3_0
+    P1_LI_R4
+    &saved_src_base
+    P1_ST_R0_R4_0
+    P1_ST_R1_R3_0
+
+    P1_LI_R3
+    &src_len
+    P1_LD_R0_R3_0
+    P1_LI_R4
+    &saved_src_len
+    P1_ST_R0_R4_0
+    P1_ST_R2_R3_0
+
+    P1_LI_R3
+    &src_cursor
+    P1_LD_R0_R3_0
+    P1_LI_R4
+    &saved_src_cursor
+    P1_ST_R0_R4_0
+    P1_LI_R0
+    %0
+    P1_ST_R0_R3_0
+
+    P1_LI_R3
+    &src_line
+    P1_LD_R0_R3_0
+    P1_LI_R4
+    &saved_src_line
+    P1_ST_R0_R4_0
+    P1_LI_R0
+    %1
+    P1_ST_R0_R3_0
+
+    P1_LI_R3
+    &src_col
+    P1_LD_R0_R3_0
+    P1_LI_R4
+    &saved_src_col
+    P1_ST_R0_R4_0
+    P1_LI_R0
+    %1
+    P1_ST_R0_R3_0
+
+    P1_LI_R4
+    %39                          ## running last_result = unspec
+
+:eval_source_loop
+    P1_LI_BR
+    &skip_ws
+    P1_CALL
+
+    P1_LI_BR
+    &peek_char
+    P1_CALL
+    P1_LI_R1
+    %0
+    P1_ADDI_R1_R1_NEG1
+    P1_LI_BR
+    &eval_source_done
+    P1_BEQ_R0_R1
+
+    P1_LI_BR
+    &read_expr
+    P1_CALL
+    P1_MOV_R1_R0
+    P1_LI_R2
+    %7
+    P1_LI_BR
+    &eval
+    P1_CALL
+    P1_MOV_R4_R0
+    P1_LI_BR
+    &eval_source_loop
+    P1_B
+
+:eval_source_done
+    P1_LI_R3
+    &saved_src_base
+    P1_LD_R0_R3_0
+    P1_LI_R1
+    &src_base
+    P1_ST_R0_R1_0
+
+    P1_LI_R3
+    &saved_src_len
+    P1_LD_R0_R3_0
+    P1_LI_R1
+    &src_len
+    P1_ST_R0_R1_0
+
+    P1_LI_R3
+    &saved_src_cursor
+    P1_LD_R0_R3_0
+    P1_LI_R1
+    &src_cursor
+    P1_ST_R0_R1_0
+
+    P1_LI_R3
+    &saved_src_line
+    P1_LD_R0_R3_0
+    P1_LI_R1
+    &src_line
+    P1_ST_R0_R1_0
+
+    P1_LI_R3
+    &saved_src_col
+    P1_LD_R0_R3_0
+    P1_LI_R1
+    &src_col
+    P1_ST_R0_R1_0
+
+    P1_MOV_R0_R4
+    P1_MOV_R3_SP
+    P1_LD_R4_R3_8
+    P1_EPILOGUE
+    P1_RET
+
+
 ## ---- hash(r1=ptr, r2=len) -> r0 = u64 hash --------------------------
 ## DJB-style: h' = 31*h + b. Implemented as (h<<5) - h + b to avoid
 ## stashing 31 in a register. Uses r6 (zero constant) across the loop;
 ## saves/restores it via a PROLOGUE_N1 slot.
 :hash
     P1_PROLOGUE
-    P1_MOV_R3_SP
-    P1_ST_R6_R3_8
+    P1_ST_R6_SP_8
 
     P1_LI_R6
-    '00000000'                      ## zero const
+    %0                      ## zero const
     P1_LI_R0
-    '00000000'                      ## h = 0
+    %0                      ## h = 0
 
 :hash_loop
     P1_LI_BR
@@ -364,8 +549,7 @@
     P1_B
 
 :hash_done
-    P1_MOV_R3_SP
-    P1_LD_R6_R3_8
+    P1_LD_R6_SP_8
     P1_EPILOGUE
     P1_RET
 
@@ -376,9 +560,8 @@
 ## scratch; both are callee-saved, so PROLOGUE_N2 stashes them.
 :sym_name_equal
     P1_PROLOGUE_N2
-    P1_MOV_R0_SP
-    P1_ST_R6_R0_8
-    P1_ST_R7_R0_16
+    P1_ST_R6_SP_8
+    P1_ST_R7_SP_16
 
     P1_ADDI_R1_R1_NEG5              ## r1 = raw sym ptr
     P1_LD_R6_R1_0                   ## r6 = header word
@@ -392,7 +575,7 @@
 
     P1_ADDI_R1_R1_8                 ## r1 = name bytes ptr
     P1_LI_R6
-    '00000000'                      ## zero const
+    %0                      ## zero const
 
 :sym_name_equal_loop
     P1_LI_BR
@@ -414,19 +597,18 @@
 
 :sym_name_equal_eq
     P1_LI_R0
-    '01000000'
+    %1
     P1_LI_BR
     &sym_name_equal_done
     P1_B
 
 :sym_name_equal_neq
     P1_LI_R0
-    '00000000'
+    %0
 
 :sym_name_equal_done
-    P1_MOV_R3_SP
-    P1_LD_R6_R3_8
-    P1_LD_R7_R3_16
+    P1_LD_R6_SP_8
+    P1_LD_R7_SP_16
     P1_EPILOGUE_N2
     P1_RET
 
@@ -441,9 +623,8 @@
 ##   [sp + 24] raw_ptr across the copy loop
 :make_symbol
     P1_PROLOGUE_N3
-    P1_MOV_R3_SP
-    P1_ST_R6_R3_8
-    P1_ST_R7_R3_16
+    P1_ST_R6_SP_8
+    P1_ST_R7_SP_16
 
     P1_MOV_R6_R1                    ## r6 = src (mutated during byte copy)
     P1_MOV_R7_R2                    ## r7 = len (mutated during byte copy)
@@ -457,19 +638,18 @@
     &alloc
     P1_CALL                         ## r0 = raw ptr
 
-    P1_MOV_R3_SP
-    P1_ST_R0_R3_24                  ## stash raw ptr
+    P1_ST_R0_SP_24                  ## stash raw ptr
 
     ## Header: store len in low 48 bits, then stamp type=2 in byte 7.
     P1_ST_R7_R0_0
     P1_LI_R1
-    '02000000'
+    %2
     P1_SB_R1_R0_7
 
     ## Byte copy: dst = r3 (= raw+8), src = r6, len = r7.
     P1_ADDI_R3_R0_8
     P1_LI_R1
-    '00000000'                      ## zero const for loop test
+    %0                      ## zero const for loop test
 
 :make_symbol_copy
     P1_LI_BR
@@ -486,16 +666,183 @@
     P1_B
 
 :make_symbol_done
-    P1_MOV_R3_SP
-    P1_LD_R0_R3_24
+    P1_LD_R0_SP_24
     P1_ORI_R0_R0_4                  ## set bit 2 (aarch64 bitmask-imm can't do 0b101 directly)
     P1_ORI_R0_R0_1                  ## set bit 0 → tag = 101 (SYMBOL)
-    P1_LD_R6_R3_8
-    P1_LD_R7_R3_16
+    P1_LD_R6_SP_8
+    P1_LD_R7_SP_16
+    P1_EPILOGUE_N3
+    P1_RET
+
+
+## ---- byte_copy(r1=dst, r2=src, r3=len) -> r0 = dst_end -------------
+## Raw byte copy used by string construction, path marshaling, and
+## string-append. No overlap handling needed in the seed.
+:byte_copy
+    P1_LI_R0
+    %0
+:byte_copy_loop
+    P1_LI_BR
+    &byte_copy_done
+    P1_BEQ_R3_R0
+    P1_LB_R0_R2_0
+    P1_SB_R0_R1_0
+    P1_ADDI_R1_R1_1
+    P1_ADDI_R2_R2_1
+    P1_ADDI_R3_R3_NEG1
+    P1_LI_R0
+    %0
+    P1_LI_BR
+    &byte_copy_loop
+    P1_B
+:byte_copy_done
+    P1_MOV_R0_R1
+    P1_RET
+
+
+## ---- alloc_string(r1=len) -> r0 = tagged string ---------------------
+## Allocates header + zero or more payload bytes, stamps type=1, and
+## leaves the payload for the caller to fill.
+:alloc_string
+    P1_PROLOGUE
+    P1_MOV_R3_SP
+    P1_ST_R1_R3_8
+
+    P1_ADDI_R1_R1_7
+    P1_SHRI_R1_R1_3
+    P1_SHLI_R1_R1_3
+    P1_ADDI_R1_R1_8
+    P1_LI_BR
+    &alloc
+    P1_CALL
+
+    P1_MOV_R3_SP
+    P1_LD_R1_R3_8
+    P1_ST_R1_R0_0
+    P1_LI_R1
+    %1
+    P1_SB_R1_R0_7
+    P1_ORI_R0_R0_4                      ## tag = 100 (string)
+    P1_EPILOGUE
+    P1_RET
+
+
+## ---- make_string(r1=src, r2=len) -> r0 = tagged string -------------
+:make_string
+    P1_PROLOGUE_N3
+    P1_MOV_R3_SP
+    P1_ST_R1_R3_8
+    P1_ST_R2_R3_16
+
+    P1_MOV_R1_R2
+    P1_LI_BR
+    &alloc_string
+    P1_CALL
+    P1_MOV_R3_SP
+    P1_ST_R0_R3_24
+
+    P1_ADDI_R1_R0_NEG4                  ## raw string ptr
+    P1_ADDI_R1_R1_8                     ## dst payload
+    P1_LD_R2_R3_8                       ## src payload
+    P1_LD_R3_R3_16                      ## len
+    P1_LI_BR
+    &byte_copy
+    P1_CALL
+
+    P1_MOV_R3_SP
+    P1_LD_R0_R3_24
     P1_EPILOGUE_N3
     P1_RET
 
 
+## ---- make_vector(r1=len_raw, r2=init) -> r0 = tagged vector --------
+## Allocates header + len tagged slots, stamps type=3, and fills every
+## element with `init`.
+:make_vector
+    P1_PROLOGUE_N2
+    P1_MOV_R3_SP
+    P1_ST_R1_R3_8
+    P1_ST_R2_R3_16
+
+    P1_SHLI_R1_R1_3
+    P1_ADDI_R1_R1_8
+    P1_LI_BR
+    &alloc
+    P1_CALL
+
+    P1_MOV_R3_SP
+    P1_LD_R1_R3_8                       ## len_raw
+    P1_ST_R0_R3_8                       ## overwrite slot1 = raw ptr
+    P1_ST_R1_R0_0
+    P1_LI_R1
+    %3
+    P1_SB_R1_R0_7
+
+    P1_MOV_R3_SP
+    P1_LD_R1_R3_8                       ## raw ptr
+    P1_LD_R2_R3_16                      ## init
+    P1_LD_R0_R1_0                       ## len_raw from header
+    P1_ADDI_R1_R1_8                     ## payload cursor
+    P1_LI_R3
+    %0
+:make_vector_loop
+    P1_LI_BR
+    &make_vector_done
+    P1_BEQ_R0_R3
+    P1_ST_R2_R1_0
+    P1_ADDI_R1_R1_8
+    P1_ADDI_R0_R0_NEG1
+    P1_LI_BR
+    &make_vector_loop
+    P1_B
+:make_vector_done
+    P1_MOV_R3_SP
+    P1_LD_R0_R3_8
+    P1_ORI_R0_R0_2
+    P1_ORI_R0_R0_1                      ## tag = 011 (vector)
+    P1_EPILOGUE_N2
+    P1_RET
+
+
+## ---- string_to_c_path(r1=tagged_string) -> r0 = &path_buf ----------
+## Copies the string bytes to a shared NUL-terminated buffer so openat
+## can consume it as a kernel pathname.
+:string_to_c_path
+    P1_PROLOGUE_N2
+    P1_ADDI_R1_R1_NEG4                  ## raw string ptr
+    P1_LD_R2_R1_0
+    P1_SHLI_R2_R2_16
+    P1_SHRI_R2_R2_16                    ## r2 = len
+    P1_MOV_R3_R2
+    P1_LI_R0
+    %256                           ## PATH_BUF_SIZE = 256
+    P1_LI_BR
+    &string_to_c_path_ok
+    P1_BLT_R3_R0
+    P1_LI_BR
+    &err_path_too_long
+    P1_B
+:string_to_c_path_ok
+    P1_MOV_R0_SP
+    P1_ST_R2_R0_8
+    P1_ADDI_R1_R1_8                     ## payload ptr
+    P1_ST_R1_R0_16
+    P1_LI_R1
+    &path_buf
+    P1_LD_R2_R0_16
+    P1_LD_R3_R0_8
+    P1_LI_BR
+    &byte_copy
+    P1_CALL
+    P1_LI_R1
+    %0
+    P1_SB_R1_R0_0
+    P1_LI_R0
+    &path_buf
+    P1_EPILOGUE_N2
+    P1_RET
+
+
 ## ---- intern(r1=name_ptr, r2=name_len) -> r0 = tagged sym -----------
 ## Open-addressing linear probe over a 4096-slot table. Empty slot =
 ## 0 word (nil is 0x07, never 0, so this sentinel is unambiguous).
@@ -528,11 +875,9 @@
     P1_ADD_R2_R2_R0                 ## r2 = &symbol_table[h]
     P1_LD_R3_R2_0                   ## r3 = slot value
 
-    P1_LI_R1
-    '00000000'
     P1_LI_BR
     &intern_empty
-    P1_BEQ_R3_R1                    ## slot == 0 → allocate
+    P1_BEQZ_R3                    ## slot == 0 → allocate
 
     ## Compare existing symbol to (r6, r7).
     P1_MOV_R1_R3                    ## r1 = tagged sym
@@ -542,11 +887,9 @@
     &sym_name_equal
     P1_CALL                         ## r0 = 0 or 1
 
-    P1_LI_R1
-    '00000000'
     P1_LI_BR
     &intern_hit
-    P1_BNE_R0_R1
+    P1_BNEZ_R0
 
     ## Advance h = (h+1) & 4095.
     P1_MOV_R3_SP
@@ -603,7 +946,7 @@
     P1_ST_R1_R3_8
     P1_ST_R2_R3_16
     P1_LI_R1
-    '10000000'
+    %16
     P1_LI_BR
     &alloc
     P1_CALL
@@ -653,17 +996,17 @@
     P1_LI_R0
     SYS_WRITE
     P1_LI_R1
-    '02000000'
+    %2
     P1_LI_R2
     &msg_error_prefix
     P1_LI_R3
-    '07000000'
+    %7
     P1_SYSCALL
 
     P1_LI_R0
     SYS_WRITE
     P1_LI_R1
-    '02000000'
+    %2
     P1_MOV_R2_R6
     P1_MOV_R3_R7
     P1_SYSCALL
@@ -671,17 +1014,17 @@
     P1_LI_R0
     SYS_WRITE
     P1_LI_R1
-    '02000000'
+    %2
     P1_LI_R2
     &msg_newline
     P1_LI_R3
-    '01000000'
+    %1
     P1_SYSCALL
 
     P1_LI_R0
     SYS_EXIT
     P1_LI_R1
-    '01000000'
+    %1
     P1_SYSCALL
 
 
@@ -690,7 +1033,7 @@
     P1_LI_R1
     &msg_oom
     P1_LI_R2
-    '0E000000'
+    %14
     P1_LI_BR
     &error
     P1_B
@@ -699,7 +1042,7 @@
     P1_LI_R1
     &msg_intern_not_eq
     P1_LI_R2
-    '22000000'                      ## strlen == 34
+    %34                      ## strlen == 34
     P1_LI_BR
     &error
     P1_B
@@ -708,7 +1051,7 @@
     P1_LI_R1
     &msg_intern_collision
     P1_LI_R2
-    '2C000000'                      ## strlen == 44
+    %44                      ## strlen == 44
     P1_LI_BR
     &error
     P1_B
@@ -717,7 +1060,7 @@
     P1_LI_R1
     &msg_usage
     P1_LI_R2
-    '16000000'                      ## strlen("usage: lisp <file.scm>") == 22
+    %22                      ## strlen("usage: lisp <file.scm>") == 22
     P1_LI_BR
     &error
     P1_B
@@ -726,7 +1069,7 @@
     P1_LI_R1
     &msg_open_fail
     P1_LI_R2
-    '1A000000'                      ## strlen("failed to open source file") == 26
+    %26                      ## strlen("failed to open source file") == 26
     P1_LI_BR
     &error
     P1_B
@@ -735,7 +1078,7 @@
     P1_LI_R1
     &msg_src_too_big
     P1_LI_R2
-    '15000000'                      ## strlen("source file too large") == 21
+    %21                      ## strlen("source file too large") == 21
     P1_LI_BR
     &error
     P1_B
@@ -748,33 +1091,33 @@
     P1_LI_R0
     SYS_WRITE
     P1_LI_R1
-    '02000000'
+    %2
     P1_LI_R2
     &msg_error_prefix
     P1_LI_R3
-    '07000000'
+    %7
     P1_SYSCALL
 
     ## "reader: malformed input"
     P1_LI_R0
     SYS_WRITE
     P1_LI_R1
-    '02000000'
+    %2
     P1_LI_R2
     &msg_reader_bad
     P1_LI_R3
-    '17000000'                      ## strlen("reader: malformed input") == 23
+    %23                      ## strlen("reader: malformed input") == 23
     P1_SYSCALL
 
     ## " at "
     P1_LI_R0
     SYS_WRITE
     P1_LI_R1
-    '02000000'
+    %2
     P1_LI_R2
     &msg_at
     P1_LI_R3
-    '04000000'
+    %4
     P1_SYSCALL
 
     ## LINE (via display_uint to stderr)
@@ -782,7 +1125,7 @@
     &src_line
     P1_LD_R1_R1_0
     P1_LI_R2
-    '02000000'
+    %2
     P1_LI_BR
     &display_uint
     P1_CALL
@@ -791,11 +1134,11 @@
     P1_LI_R0
     SYS_WRITE
     P1_LI_R1
-    '02000000'
+    %2
     P1_LI_R2
     &msg_colon
     P1_LI_R3
-    '01000000'
+    %1
     P1_SYSCALL
 
     ## COL
@@ -803,7 +1146,7 @@
     &src_col
     P1_LD_R1_R1_0
     P1_LI_R2
-    '02000000'
+    %2
     P1_LI_BR
     &display_uint
     P1_CALL
@@ -812,17 +1155,17 @@
     P1_LI_R0
     SYS_WRITE
     P1_LI_R1
-    '02000000'
+    %2
     P1_LI_R2
     &msg_newline
     P1_LI_R3
-    '01000000'
+    %1
     P1_SYSCALL
 
     P1_LI_R0
     SYS_EXIT
     P1_LI_R1
-    '01000000'
+    %1
     P1_SYSCALL
 
 
@@ -838,20 +1181,20 @@
 ## src_base/src_len are set by _start after it reads argv[1] into
 ## src_buf. src_cursor starts at 0; src_line/src_col start at 1.
 :src_base
-'00000000'
-'00000000'
+%0
+%0
 :src_len
-'00000000'
-'00000000'
+%0
+%0
 :src_cursor
-'00000000'
-'00000000'
+%0
+%0
 :src_line
-'01000000'
-'00000000'
+%1
+%0
 :src_col
-'01000000'
-'00000000'
+%1
+%0
 
 
 ## ---- peek_char() -> r0 = char (0..255) or -1 on EOF ----------------
@@ -866,7 +1209,7 @@
     &peek_char_inb
     P1_BLT_R1_R2                        ## cursor < len → in-bounds
     P1_LI_R0
-    '00000000'
+    %0
     P1_ADDI_R0_R0_NEG1                  ## r0 = -1
     P1_RET
 :peek_char_inb
@@ -894,7 +1237,7 @@
 
     ## if char == '\n', bump line and reset col; else col++.
     P1_LI_R1
-    '0A000000'                          ## '\n' = 10
+    %10                          ## '\n' = 10
     P1_LI_BR
     &advance_newline
     P1_BEQ_R0_R1
@@ -916,7 +1259,7 @@
     P1_LI_R1
     &src_col
     P1_LI_R2
-    '01000000'
+    %1
     P1_ST_R2_R1_0
     P1_EPILOGUE
     P1_RET
@@ -932,7 +1275,7 @@
 
     ## EOF → done
     P1_LI_R1
-    '00000000'
+    %0
     P1_ADDI_R1_R1_NEG1
     P1_LI_BR
     &skip_ws_done
@@ -940,31 +1283,31 @@
 
     ## ' ' (0x20)
     P1_LI_R1
-    '20000000'
+    %32
     P1_LI_BR
     &skip_ws_eat
     P1_BEQ_R0_R1
     ## '\t' (0x09)
     P1_LI_R1
-    '09000000'
+    %9
     P1_LI_BR
     &skip_ws_eat
     P1_BEQ_R0_R1
     ## '\n' (0x0A)
     P1_LI_R1
-    '0A000000'
+    %10
     P1_LI_BR
     &skip_ws_eat
     P1_BEQ_R0_R1
     ## '\r' (0x0D)
     P1_LI_R1
-    '0D000000'
+    %13
     P1_LI_BR
     &skip_ws_eat
     P1_BEQ_R0_R1
     ## ';' (0x3B)
     P1_LI_R1
-    '3B000000'
+    %59
     P1_LI_BR
     &skip_ws_comment
     P1_BEQ_R0_R1
@@ -991,14 +1334,14 @@
     P1_CALL
     ## EOF → outer loop (will see -1 and exit)
     P1_LI_R1
-    '00000000'
+    %0
     P1_ADDI_R1_R1_NEG1
     P1_LI_BR
     &skip_ws_loop
     P1_BEQ_R0_R1
     ## '\n' → eat and outer loop
     P1_LI_R1
-    '0A000000'
+    %10
     P1_LI_BR
     &skip_ws_eat
     P1_BEQ_R0_R1
@@ -1019,14 +1362,14 @@
 ## Character already in r1.
 :is_digit
     P1_LI_R2
-    '30000000'                          ## '0' = 48
+    %48                          ## '0' = 48
     P1_LI_R0
-    '00000000'                          ## default: not digit
+    %0                          ## default: not digit
     P1_LI_BR
     &is_digit_done
     P1_BLT_R1_R2                        ## c < '0' → not digit
     P1_LI_R2
-    '3A000000'                          ## '9' + 1 = 58 (:)
+    %58                          ## '9' + 1 = 58 (:)
     P1_LI_BR
     &is_digit_yes
     P1_BLT_R1_R2                        ## c < ':' → in range
@@ -1035,7 +1378,7 @@
     P1_B
 :is_digit_yes
     P1_LI_R0
-    '01000000'
+    %1
 :is_digit_done
     P1_RET
 
@@ -1050,7 +1393,7 @@
     P1_ST_R6_R3_8
 
     P1_LI_R6
-    '00000000'                          ## r6 = 0 (accumulator)
+    %0                          ## r6 = 0 (accumulator)
 
 :read_number_loop
     P1_LI_BR
@@ -1062,11 +1405,9 @@
     P1_LI_BR
     &is_digit
     P1_CALL                             ## r0 = 0 or 1
-    P1_LI_R1
-    '00000000'
     P1_LI_BR
     &read_number_done
-    P1_BEQ_R0_R1
+    P1_BEQZ_R0
 
     ## digit = peek - '0'. Re-peek (simpler than stashing).
     P1_LI_BR
@@ -1103,50 +1444,50 @@
 ## Returns 1 if c is a token delimiter: whitespace, '(', ')', ';', or EOF.
 :is_delim
     P1_LI_R0
-    '01000000'                          ## optimistic: delim
+    %1                          ## optimistic: delim
     P1_LI_R2
-    '00000000'
+    %0
     P1_ADDI_R2_R2_NEG1
     P1_LI_BR
     &is_delim_done
     P1_BEQ_R1_R2                        ## EOF
     P1_LI_R2
-    '20000000'
+    %32
     P1_LI_BR
     &is_delim_done
     P1_BEQ_R1_R2
     P1_LI_R2
-    '09000000'
+    %9
     P1_LI_BR
     &is_delim_done
     P1_BEQ_R1_R2
     P1_LI_R2
-    '0A000000'
+    %10
     P1_LI_BR
     &is_delim_done
     P1_BEQ_R1_R2
     P1_LI_R2
-    '0D000000'
+    %13
     P1_LI_BR
     &is_delim_done
     P1_BEQ_R1_R2
     P1_LI_R2
-    '28000000'                          ## '('
+    %40                          ## '('
     P1_LI_BR
     &is_delim_done
     P1_BEQ_R1_R2
     P1_LI_R2
-    '29000000'                          ## ')'
+    %41                          ## ')'
     P1_LI_BR
     &is_delim_done
     P1_BEQ_R1_R2
     P1_LI_R2
-    '3B000000'                          ## ';'
+    %59                          ## ';'
     P1_LI_BR
     &is_delim_done
     P1_BEQ_R1_R2
     P1_LI_R0
-    '00000000'
+    %0
 :is_delim_done
     P1_RET
 
@@ -1179,7 +1520,7 @@
     &is_delim
     P1_CALL
     P1_LI_R1
-    '01000000'
+    %1
     P1_LI_BR
     &read_symbol_done
     P1_BEQ_R0_R1                        ## delim → stop
@@ -1199,16 +1540,163 @@
     P1_SUB_R2_R1_R6                     ## r2 = cur - start = len
 
     ## If length 0, malformed (shouldn't happen — caller peeks before).
+    P1_LI_BR
+    &err_reader_bad
+    P1_BEQZ_R2
+
+    P1_MOV_R1_R7                        ## r1 = ptr to first byte
+    ## r2 = len (already set)
+    P1_LI_BR
+    &intern
+    P1_CALL
+
+    P1_MOV_R3_SP
+    P1_LD_R6_R3_8
+    P1_LD_R7_R3_16
+    P1_EPILOGUE_N2
+    P1_RET
+
+
+## ---- read_string() -> r0 = tagged string --------------------------
+## Reads a double-quoted string into a scratch buffer, handling the
+## four escape forms the seed needs: \n, \t, \\, and \".
+:read_string
+    P1_PROLOGUE_N2
+    P1_MOV_R3_SP
+    P1_ST_R6_R3_8
+    P1_ST_R7_R3_16
+
+    P1_LI_BR
+    &advance_char
+    P1_CALL                             ## eat opening '"'
+
+    P1_LI_R6
+    &reader_string_buf
+    P1_LI_R7
+    %0                          ## length
+
+:read_string_loop
+    P1_LI_BR
+    &peek_char
+    P1_CALL
+    P1_LI_R1
+    %0
+    P1_ADDI_R1_R1_NEG1
+    P1_LI_BR
+    &err_reader_bad
+    P1_BEQ_R0_R1                        ## EOF in string
+
+    P1_LI_R1
+    %34
+    P1_LI_BR
+    &read_string_done
+    P1_BEQ_R0_R1                        ## closing '"'
+
+    P1_LI_R1
+    %92
+    P1_LI_BR
+    &read_string_escape
+    P1_BEQ_R0_R1
+
+    P1_LI_R1
+    %512                           ## READER_STRING_BUF_SIZE = 512
+    P1_LI_BR
+    &read_string_store
+    P1_BLT_R7_R1
+    P1_LI_BR
+    &err_reader_bad
+    P1_B
+
+:read_string_store
+    P1_SB_R0_R6_0
+    P1_ADDI_R6_R6_1
+    P1_ADDI_R7_R7_1
+    P1_LI_BR
+    &advance_char
+    P1_CALL
+    P1_LI_BR
+    &read_string_loop
+    P1_B
+
+:read_string_escape
+    P1_LI_BR
+    &advance_char
+    P1_CALL                             ## eat '\'
+    P1_LI_BR
+    &peek_char
+    P1_CALL
+    P1_LI_R1
+    %0
+    P1_ADDI_R1_R1_NEG1
+    P1_LI_BR
+    &err_reader_bad
+    P1_BEQ_R0_R1
+
+    P1_LI_R1
+    %110                          ## 'n'
+    P1_LI_BR
+    &read_string_escape_nl
+    P1_BEQ_R0_R1
     P1_LI_R1
-    '00000000'
+    %116                          ## 't'
+    P1_LI_BR
+    &read_string_escape_tab
+    P1_BEQ_R0_R1
+    P1_LI_R1
+    %92                          ## '\\'
+    P1_LI_BR
+    &read_string_store_escaped
+    P1_BEQ_R0_R1
+    P1_LI_R1
+    %34                          ## '"'
+    P1_LI_BR
+    &read_string_store_escaped
+    P1_BEQ_R0_R1
+    P1_LI_BR
+    &err_reader_bad
+    P1_B
+
+:read_string_escape_nl
+    P1_LI_R0
+    %10
+    P1_LI_BR
+    &read_string_store_escaped
+    P1_B
+
+:read_string_escape_tab
+    P1_LI_R0
+    %9
+
+:read_string_store_escaped
+    P1_LI_R1
+    %4096
+    P1_LI_BR
+    &read_string_store_escaped_ok
+    P1_BLT_R7_R1
+    P1_LI_BR
+    &err_reader_bad
+    P1_B
+
+:read_string_store_escaped_ok
+    P1_SB_R0_R6_0
+    P1_ADDI_R6_R6_1
+    P1_ADDI_R7_R7_1
     P1_LI_BR
-    &err_reader_bad
-    P1_BEQ_R2_R1
+    &advance_char
+    P1_CALL                             ## eat escaped payload char
+    P1_LI_BR
+    &read_string_loop
+    P1_B
 
-    P1_MOV_R1_R7                        ## r1 = ptr to first byte
-    ## r2 = len (already set)
+:read_string_done
     P1_LI_BR
-    &intern
+    &advance_char
+    P1_CALL                             ## eat closing '"'
+    P1_LI_R1
+    &reader_string_buf
+    P1_MOV_R2_R7
+    P1_LI_BR
+    &make_string
     P1_CALL
 
     P1_MOV_R3_SP
@@ -1237,14 +1725,14 @@
     &peek_char
     P1_CALL
     P1_LI_R1
-    '29000000'                          ## ')'
+    %41                          ## ')'
     P1_LI_BR
     &read_list_close
     P1_BEQ_R0_R1
 
     ## EOF mid-list → error.
     P1_LI_R1
-    '00000000'
+    %0
     P1_ADDI_R1_R1_NEG1
     P1_LI_BR
     &err_reader_bad
@@ -1284,7 +1772,7 @@
     &advance_char
     P1_CALL                             ## eat ')'
     P1_LI_R0
-    '07000000'                          ## nil = 0x07
+    NIL                          ## nil = 0x07
     P1_EPILOGUE
     P1_RET
 
@@ -1304,7 +1792,7 @@
 
     ## EOF → error.
     P1_LI_R1
-    '00000000'
+    %0
     P1_ADDI_R1_R1_NEG1
     P1_LI_BR
     &err_reader_bad
@@ -1312,14 +1800,21 @@
 
     ## '(' → list.
     P1_LI_R1
-    '28000000'
+    %40
     P1_LI_BR
     &read_expr_list
     P1_BEQ_R0_R1
 
+    ## '"' → string literal.
+    P1_LI_R1
+    %34
+    P1_LI_BR
+    &read_expr_string
+    P1_BEQ_R0_R1
+
     ## '#' → hash-prefix literal (#t, #f for now).
     P1_LI_R1
-    '23000000'
+    %35
     P1_LI_BR
     &read_expr_hash
     P1_BEQ_R0_R1
@@ -1330,7 +1825,7 @@
     &is_digit
     P1_CALL
     P1_LI_R1
-    '01000000'
+    %1
     P1_LI_BR
     &read_expr_number
     P1_BEQ_R0_R1
@@ -1359,6 +1854,13 @@
     P1_EPILOGUE
     P1_RET
 
+:read_expr_string
+    P1_LI_BR
+    &read_string
+    P1_CALL
+    P1_EPILOGUE
+    P1_RET
+
 ## Hash-prefix literals: `#t` → 0x0F, `#f` → 0x17. Inherits read_expr's
 ## PROLOGUE (no new frame). Extended syntax (#\char, #(…)) is step 11.
 :read_expr_hash
@@ -1370,12 +1872,12 @@
     P1_CALL                             ## r0 = next char
 
     P1_LI_R1
-    '74000000'                          ## 't'
+    %116                          ## 't'
     P1_LI_BR
     &read_expr_hash_t
     P1_BEQ_R0_R1
     P1_LI_R1
-    '66000000'                          ## 'f'
+    %102                          ## 'f'
     P1_LI_BR
     &read_expr_hash_f
     P1_BEQ_R0_R1
@@ -1389,7 +1891,7 @@
     &advance_char
     P1_CALL                             ## eat 't'
     P1_LI_R0
-    '0F000000'                          ## #t singleton
+    TRUE                          ## #t singleton
     P1_EPILOGUE
     P1_RET
 
@@ -1398,7 +1900,7 @@
     &advance_char
     P1_CALL                             ## eat 'f'
     P1_LI_R0
-    '17000000'                          ## #f singleton
+    FALSE                          ## #f singleton
     P1_EPILOGUE
     P1_RET
 
@@ -1407,8 +1909,8 @@
 
 ## ---- putc(r1=char) — write one byte to fd 1 ------------------------
 :putc_buf
-'00000000'
-'00000000'
+%0
+%0
 
 :putc
     P1_PROLOGUE
@@ -1418,10 +1920,10 @@
     P1_LI_R0
     SYS_WRITE
     P1_LI_R1
-    '01000000'
+    %1
     ## r2 = &putc_buf already
     P1_LI_R3
-    '01000000'
+    %1
     P1_SYSCALL
     P1_EPILOGUE
     P1_RET
@@ -1436,44 +1938,39 @@
 :digit_buf
 '000000000000000000000000000000000000000000000000'
 :digit_buf_end
-'00000000'
+%0
 
 :display_uint
     P1_PROLOGUE_N3
-    P1_MOV_R3_SP
-    P1_ST_R6_R3_8
-    P1_ST_R7_R3_16
-    P1_ST_R2_R3_24                      ## save fd
+    P1_ST_R6_SP_8
+    P1_ST_R7_SP_16
+    P1_ST_R2_SP_24                      ## save fd
 
     P1_LI_R6
     &digit_buf_end                      ## r6 = end-of-buffer cursor (moves left)
     P1_MOV_R7_R1                        ## r7 = value (mutated)
 
     ## Special-case zero.
-    P1_LI_R1
-    '00000000'
     P1_LI_BR
     &du_loop
-    P1_BNE_R7_R1                        ## if value != 0, loop; else write '0'
+    P1_BNEZ_R7                        ## if value != 0, loop; else write '0'
     P1_ADDI_R6_R6_NEG1
     P1_LI_R1
-    '30000000'                          ## '0'
+    %48                          ## '0'
     P1_SB_R1_R6_0
     P1_LI_BR
     &du_write
     P1_B
 
 :du_loop
-    P1_LI_R1
-    '00000000'
     P1_LI_BR
     &du_write
-    P1_BEQ_R7_R1                        ## value == 0 → done digit gen
+    P1_BEQZ_R7                        ## value == 0 → done digit gen
 
     ## digit = value % 10.
     P1_MOV_R1_R7
     P1_LI_R2
-    '0A000000'
+    %10
     P1_REM_R1_R1_R2                     ## r1 = value % 10
     P1_ADDI_R1_R1_48                    ## r1 += '0'
     P1_ADDI_R6_R6_NEG1
@@ -1482,7 +1979,7 @@
     ## value = value / 10.
     P1_MOV_R1_R7
     P1_LI_R2
-    '0A000000'
+    %10
     P1_DIV_R1_R1_R2
     P1_MOV_R7_R1
 
@@ -1493,8 +1990,7 @@
 :du_write
     ## Stash fd into r0 first — computing len clobbers r3 (we need it
     ## as SP for the slot-3 load), so grab fd before that step.
-    P1_MOV_R3_SP
-    P1_LD_R0_R3_24                      ## r0 = fd (temp; SYS_WRITE will overwrite r0)
+    P1_LD_R0_SP_24                      ## r0 = fd (temp; SYS_WRITE will overwrite r0)
     P1_LI_R1
     &digit_buf_end
     P1_SUB_R3_R1_R6                     ## r3 = len = digit_buf_end - r6
@@ -1504,9 +2000,8 @@
     SYS_WRITE
     P1_SYSCALL
 
-    P1_MOV_R3_SP
-    P1_LD_R6_R3_8
-    P1_LD_R7_R3_16
+    P1_LD_R6_SP_8
+    P1_LD_R7_SP_16
     P1_EPILOGUE_N3
     P1_RET
 
@@ -1523,21 +2018,21 @@
 
     ## nil = 0x07
     P1_LI_R2
-    '07000000'
+    NIL
     P1_LI_BR
     &display_nil
     P1_BEQ_R1_R2
 
     ## #t = 0x0F
     P1_LI_R2
-    '0F000000'
+    TRUE
     P1_LI_BR
     &display_true
     P1_BEQ_R1_R2
 
     ## #f = 0x17
     P1_LI_R2
-    '17000000'
+    FALSE
     P1_LI_BR
     &display_false
     P1_BEQ_R1_R2
@@ -1546,29 +2041,29 @@
     P1_MOV_R2_R1
     P1_ANDI_R1_R1_7                     ## r1 = tag
     P1_LI_R3
-    '01000000'
+    TAG_FIXNUM
     P1_LI_BR
     &display_fixnum
     P1_BEQ_R1_R3
     P1_LI_R3
-    '02000000'
+    TAG_PAIR
     P1_LI_BR
     &display_pair
     P1_BEQ_R1_R3
     P1_LI_R3
-    '05000000'
+    TAG_SYMBOL
     P1_LI_BR
     &display_symbol
     P1_BEQ_R1_R3
     P1_LI_R3
-    '04000000'
+    TAG_STRING
     P1_LI_BR
     &display_string
     P1_BEQ_R1_R3
 
     ## Unknown — treat as "?"
     P1_LI_R1
-    '3F000000'                          ## '?'
+    %63                          ## '?'
     P1_LI_BR
     &putc
     P1_CALL
@@ -1577,12 +2072,12 @@
 
 :display_nil
     P1_LI_R1
-    '28000000'                          ## '('
+    %40                          ## '('
     P1_LI_BR
     &putc
     P1_CALL
     P1_LI_R1
-    '29000000'                          ## ')'
+    %41                          ## ')'
     P1_LI_BR
     &putc
     P1_CALL
@@ -1593,12 +2088,12 @@
 ## display or write — display_fixnum/symbol pattern).
 :display_true
     P1_LI_R1
-    '23000000'                          ## '#'
+    %35                          ## '#'
     P1_LI_BR
     &putc
     P1_CALL
     P1_LI_R1
-    '74000000'                          ## 't'
+    %116                          ## 't'
     P1_LI_BR
     &putc
     P1_CALL
@@ -1607,12 +2102,12 @@
 
 :display_false
     P1_LI_R1
-    '23000000'                          ## '#'
+    %35                          ## '#'
     P1_LI_BR
     &putc
     P1_CALL
     P1_LI_R1
-    '66000000'                          ## 'f'
+    %102                          ## 'f'
     P1_LI_BR
     &putc
     P1_CALL
@@ -1623,7 +2118,7 @@
     P1_MOV_R1_R2
     P1_SARI_R1_R1_3                     ## signed shift; value (assume non-negative here)
     P1_LI_R2
-    '01000000'                          ## fd = stdout
+    %1                          ## fd = stdout
     P1_LI_BR
     &display_uint
     P1_CALL
@@ -1641,7 +2136,7 @@
     P1_LI_R0
     SYS_WRITE
     P1_LI_R1
-    '01000000'
+    %1
     P1_SYSCALL
     P1_EPILOGUE_N2
     P1_RET
@@ -1655,7 +2150,7 @@
     P1_MOV_R6_R2                        ## r6 = tagged pair (we'll walk cdr chain)
 
     P1_LI_R1
-    '28000000'                          ## '('
+    %40                          ## '('
     P1_LI_BR
     &putc
     P1_CALL
@@ -1680,7 +2175,7 @@
 
     ## If cdr == nil, done.
     P1_LI_R1
-    '07000000'
+    NIL
     P1_LI_BR
     &display_pair_close
     P1_BEQ_R6_R1
@@ -1689,24 +2184,24 @@
     P1_MOV_R1_R6
     P1_ANDI_R1_R1_7
     P1_LI_R2
-    '02000000'
+    TAG_PAIR
     P1_LI_BR
     &display_pair_continue
     P1_BEQ_R1_R2
 
     ## Otherwise, improper: " . x)".
     P1_LI_R1
-    '20000000'                          ## ' '
+    %32                          ## ' '
     P1_LI_BR
     &putc
     P1_CALL
     P1_LI_R1
-    '2E000000'                          ## '.'
+    %46                          ## '.'
     P1_LI_BR
     &putc
     P1_CALL
     P1_LI_R1
-    '20000000'
+    %32
     P1_LI_BR
     &putc
     P1_CALL
@@ -1720,7 +2215,7 @@
 
 :display_pair_continue
     P1_LI_R1
-    '20000000'                          ## ' '
+    %32                          ## ' '
     P1_LI_BR
     &putc
     P1_CALL
@@ -1730,14 +2225,13 @@
 
 :display_pair_close
     P1_LI_R1
-    '29000000'                          ## ')'
+    %41                          ## ')'
     P1_LI_BR
     &putc
     P1_CALL
 
-    P1_MOV_R3_SP
-    P1_LD_R6_R3_8
-    P1_LD_R7_R3_16
+    P1_LD_R6_SP_8
+    P1_LD_R7_SP_16
     P1_EPILOGUE_N2
     P1_RET
 
@@ -1757,7 +2251,7 @@
     P1_LI_R0
     SYS_WRITE
     P1_LI_R1
-    '01000000'
+    %1
     P1_SYSCALL
     P1_EPILOGUE_N2
     P1_RET
@@ -1772,19 +2266,19 @@
     P1_PROLOGUE_N2
 
     P1_LI_R2
-    '07000000'
+    NIL
     P1_LI_BR
     &display_nil
     P1_BEQ_R1_R2                        ## nil
 
     P1_LI_R2
-    '0F000000'
+    TRUE
     P1_LI_BR
     &display_true
     P1_BEQ_R1_R2                        ## #t
 
     P1_LI_R2
-    '17000000'
+    FALSE
     P1_LI_BR
     &display_false
     P1_BEQ_R1_R2                        ## #f
@@ -1792,29 +2286,29 @@
     P1_MOV_R2_R1
     P1_ANDI_R1_R1_7                     ## r1 = tag
     P1_LI_R3
-    '01000000'
+    TAG_FIXNUM
     P1_LI_BR
     &display_fixnum
     P1_BEQ_R1_R3
     P1_LI_R3
-    '02000000'
+    TAG_PAIR
     P1_LI_BR
     &write_pair
     P1_BEQ_R1_R3
     P1_LI_R3
-    '05000000'
+    TAG_SYMBOL
     P1_LI_BR
     &display_symbol
     P1_BEQ_R1_R3
     P1_LI_R3
-    '04000000'
+    TAG_STRING
     P1_LI_BR
     &write_string
     P1_BEQ_R1_R3
 
     ## Unknown (closure/prim, etc.) — emit '?' placeholder.
     P1_LI_R1
-    '3F000000'
+    %63
     P1_LI_BR
     &putc
     P1_CALL
@@ -1827,9 +2321,8 @@
 ## write's PROLOGUE_N2 frame; r6=cursor, r7=remaining-bytes saved in
 ## the two slots across putc calls.
 :write_string
-    P1_MOV_R3_SP
-    P1_ST_R6_R3_8
-    P1_ST_R7_R3_16
+    P1_ST_R6_SP_8
+    P1_ST_R7_SP_16
 
     P1_ADDI_R2_R2_NEG4
     P1_LD_R3_R2_0
@@ -1840,28 +2333,26 @@
     P1_MOV_R7_R3                        ## r7 = length
 
     P1_LI_R1
-    '22000000'                          ## '"'
+    %34                          ## '"'
     P1_LI_BR
     &putc
     P1_CALL
 
 :write_string_loop
-    P1_LI_R1
-    '00000000'
     P1_LI_BR
     &write_string_done
-    P1_BEQ_R7_R1                        ## length == 0 → done
+    P1_BEQZ_R7                        ## length == 0 → done
 
     P1_LB_R1_R6_0                       ## r1 = *cursor
 
     P1_LI_R2
-    '22000000'                          ## '"'
+    %34                          ## '"'
     P1_LI_BR
     &write_string_escape
     P1_BEQ_R1_R2
 
     P1_LI_R2
-    '5C000000'                          ## '\\'
+    %92                          ## '\\'
     P1_LI_BR
     &write_string_escape
     P1_BEQ_R1_R2
@@ -1880,7 +2371,7 @@
 :write_string_escape
     ## Emit '\\' then re-emit the char (cursor still points to it).
     P1_LI_R1
-    '5C000000'
+    %92
     P1_LI_BR
     &putc
     P1_CALL
@@ -1894,13 +2385,12 @@
 
 :write_string_done
     P1_LI_R1
-    '22000000'                          ## '"'
+    %34                          ## '"'
     P1_LI_BR
     &putc
     P1_CALL
-    P1_MOV_R3_SP
-    P1_LD_R6_R3_8
-    P1_LD_R7_R3_16
+    P1_LD_R6_SP_8
+    P1_LD_R7_SP_16
     P1_EPILOGUE_N2
     P1_RET
 
@@ -1909,14 +2399,13 @@
 ## Mirror of display_pair but recurses through write (strings quoted).
 ## Shares write's PROLOGUE_N2 frame.
 :write_pair
-    P1_MOV_R3_SP
-    P1_ST_R6_R3_8
-    P1_ST_R7_R3_16
+    P1_ST_R6_SP_8
+    P1_ST_R7_SP_16
 
     P1_MOV_R6_R2                        ## r6 = tagged pair cursor
 
     P1_LI_R1
-    '28000000'                          ## '('
+    %40                          ## '('
     P1_LI_BR
     &putc
     P1_CALL
@@ -1938,7 +2427,7 @@
     P1_MOV_R6_R0
 
     P1_LI_R1
-    '07000000'
+    NIL
     P1_LI_BR
     &write_pair_close
     P1_BEQ_R6_R1
@@ -1946,24 +2435,24 @@
     P1_MOV_R1_R6
     P1_ANDI_R1_R1_7
     P1_LI_R2
-    '02000000'
+    TAG_PAIR
     P1_LI_BR
     &write_pair_continue
     P1_BEQ_R1_R2
 
     ## improper tail: " . x)"
     P1_LI_R1
-    '20000000'
+    %32
     P1_LI_BR
     &putc
     P1_CALL
     P1_LI_R1
-    '2E000000'
+    %46
     P1_LI_BR
     &putc
     P1_CALL
     P1_LI_R1
-    '20000000'
+    %32
     P1_LI_BR
     &putc
     P1_CALL
@@ -1977,7 +2466,7 @@
 
 :write_pair_continue
     P1_LI_R1
-    '20000000'
+    %32
     P1_LI_BR
     &putc
     P1_CALL
@@ -1987,14 +2476,13 @@
 
 :write_pair_close
     P1_LI_R1
-    '29000000'                          ## ')'
+    %41                          ## ')'
     P1_LI_BR
     &putc
     P1_CALL
 
-    P1_MOV_R3_SP
-    P1_LD_R6_R3_8
-    P1_LD_R7_R3_16
+    P1_LD_R6_SP_8
+    P1_LD_R7_SP_16
     P1_EPILOGUE_N2
     P1_RET
 
@@ -2048,7 +2536,7 @@
     P1_MOV_R3_SP
     P1_LD_R2_R3_16
     P1_LI_R1
-    '07000000'
+    %7
     P1_LI_BR
     &lookup_alist_miss
     P1_BEQ_R2_R1                        ## cursor == nil → miss
@@ -2092,7 +2580,7 @@
 
 :lookup_alist_miss
     P1_LI_R0
-    '07000000'
+    %7
     P1_EPILOGUE_N3
     P1_RET
 
@@ -2109,7 +2597,7 @@
     P1_CALL                             ## r0 = local pair or nil
 
     P1_LI_R1
-    '07000000'
+    %7
     P1_LI_BR
     &lookup_global
     P1_BEQ_R0_R1
@@ -2132,7 +2620,7 @@
     P1_CALL
 
     P1_LI_R1
-    '07000000'
+    %7
     P1_LI_BR
     &err_unbound
     P1_BEQ_R0_R1
@@ -2162,14 +2650,14 @@
     P1_MOV_R3_SP
     P1_LD_R1_R3_8
     P1_LI_R2
-    '07000000'
+    %7
     P1_LI_BR
     &env_extend_done
     P1_BEQ_R1_R2                        ## names == nil → done
 
     P1_LD_R1_R3_16
     P1_LI_R2
-    '07000000'
+    %7
     P1_LI_BR
     &err_arity
     P1_BEQ_R1_R2                        ## vals == nil → arity error
@@ -2249,13 +2737,13 @@
     P1_ST_R0_R3_24                      ## slot 3 = env
 
     P1_LI_R1
-    '20000000'                          ## 32 bytes
+    %32                          ## 32 bytes
     P1_LI_BR
     &alloc
     P1_CALL                             ## r0 = raw ptr
 
     P1_LI_R1
-    '04000000'
+    %4
     P1_SB_R1_R0_7                       ## type = 4 (closure)
 
     P1_MOV_R3_SP
@@ -2287,7 +2775,7 @@
     P1_ST_R0_R3_24                      ## slot 3 = type
 
     P1_LI_R1
-    '10000000'                          ## 16 bytes
+    %16                          ## 16 bytes
     P1_LI_BR
     &alloc
     P1_CALL                             ## r0 = raw ptr
@@ -2316,7 +2804,7 @@
     P1_ST_R2_R3_16                      ## slot 2 = env
 
     P1_LI_R2
-    '07000000'
+    %7
     P1_LI_BR
     &eval_args_done
     P1_BEQ_R1_R2
@@ -2356,7 +2844,7 @@
 
 :eval_args_done
     P1_LI_R0
-    '07000000'
+    %7
     P1_EPILOGUE_N3
     P1_RET
 
@@ -2375,7 +2863,7 @@
 
     P1_ANDI_R1_R1_7
     P1_LI_R0
-    '06000000'
+    TAG_PROC
     P1_LI_BR
     &err_not_callable
     P1_BNE_R1_R0
@@ -2387,12 +2875,12 @@
     ## Fork on header type byte.
     P1_LB_R0_R1_7                       ## r0 = type
     P1_LI_R2
-    '05000000'
+    TYPE_PRIM_FIXED
     P1_LI_BR
     &apply_prim_fixed
     P1_BEQ_R0_R2
     P1_LI_R2
-    '06000000'
+    TYPE_PRIM_VARIADIC
     P1_LI_BR
     &apply_prim_variadic
     P1_BEQ_R0_R2
@@ -2479,17 +2967,17 @@
     P1_LI_R2
     &prim_argv                          ## r2 = cursor
     P1_LI_R3
-    '00000000'                          ## r3 = count
+    %0                          ## r3 = count
 
 :marshal_argv_loop
     P1_LI_R0
-    '07000000'
+    %7
     P1_LI_BR
     &marshal_argv_done
     P1_BEQ_R1_R0                        ## list == nil → done
 
     P1_LI_R0
-    '20000000'                          ## PRIM_ARGV_SLOTS = 32
+    %32                          ## PRIM_ARGV_SLOTS = 32
     P1_LI_BR
     &err_too_many_args
     P1_BEQ_R3_R0
@@ -2518,141 +3006,199 @@
 ## already set up, and RET returns to apply's caller (since apply
 ## already ran EPILOGUE_N4 before branching here).
 :prim_dispatch
-    P1_LI_R0
-    '00000000'
     P1_LI_BR
     &prim_add
-    P1_BEQ_R3_R0
+    P1_BEQZ_R3
     P1_LI_R0
-    '01000000'
+    %1
     P1_LI_BR
     &prim_sub
     P1_BEQ_R3_R0
     P1_LI_R0
-    '02000000'
+    %2
     P1_LI_BR
     &prim_mul
     P1_BEQ_R3_R0
     P1_LI_R0
-    '03000000'
+    %3
     P1_LI_BR
     &prim_div
     P1_BEQ_R3_R0
     P1_LI_R0
-    '04000000'
+    %4
     P1_LI_BR
     &prim_mod
     P1_BEQ_R3_R0
     P1_LI_R0
-    '05000000'
+    %5
     P1_LI_BR
     &prim_numeq
     P1_BEQ_R3_R0
     P1_LI_R0
-    '06000000'
+    %6
     P1_LI_BR
     &prim_lt
     P1_BEQ_R3_R0
     P1_LI_R0
-    '07000000'
+    %7
     P1_LI_BR
     &prim_gt
     P1_BEQ_R3_R0
     P1_LI_R0
-    '08000000'
+    %8
     P1_LI_BR
     &prim_le
     P1_BEQ_R3_R0
     P1_LI_R0
-    '09000000'
+    %9
     P1_LI_BR
     &prim_ge
     P1_BEQ_R3_R0
     P1_LI_R0
-    '0A000000'
+    %10
     P1_LI_BR
     &prim_zerop
     P1_BEQ_R3_R0
     P1_LI_R0
-    '0B000000'
+    %11
     P1_LI_BR
     &prim_negativep
     P1_BEQ_R3_R0
     P1_LI_R0
-    '0C000000'
+    %12
     P1_LI_BR
     &prim_positivep
     P1_BEQ_R3_R0
     P1_LI_R0
-    '0D000000'
+    %13
     P1_LI_BR
     &prim_abs
     P1_BEQ_R3_R0
     P1_LI_R0
-    '0E000000'
+    %14
     P1_LI_BR
     &prim_min
     P1_BEQ_R3_R0
     P1_LI_R0
-    '0F000000'
+    %15
     P1_LI_BR
     &prim_max
     P1_BEQ_R3_R0
     P1_LI_R0
-    '10000000'
+    %16
     P1_LI_BR
     &prim_bitand
     P1_BEQ_R3_R0
     P1_LI_R0
-    '11000000'
+    %17
     P1_LI_BR
     &prim_bitor
     P1_BEQ_R3_R0
     P1_LI_R0
-    '12000000'
+    %18
     P1_LI_BR
     &prim_bitxor
     P1_BEQ_R3_R0
     P1_LI_R0
-    '13000000'
+    %19
     P1_LI_BR
     &prim_bitnot
     P1_BEQ_R3_R0
     P1_LI_R0
-    '14000000'
+    %20
     P1_LI_BR
     &prim_ashift
     P1_BEQ_R3_R0
     P1_LI_R0
-    '15000000'
+    %21
     P1_LI_BR
     &prim_numberp
     P1_BEQ_R3_R0
     P1_LI_R0
-    '16000000'
+    %22
     P1_LI_BR
     &prim_symbolp
     P1_BEQ_R3_R0
     P1_LI_R0
-    '17000000'
+    %23
     P1_LI_BR
     &prim_stringp
     P1_BEQ_R3_R0
     P1_LI_R0
-    '18000000'
+    %24
     P1_LI_BR
     &prim_vectorp
     P1_BEQ_R3_R0
     P1_LI_R0
-    '19000000'
+    %25
     P1_LI_BR
     &prim_procp
     P1_BEQ_R3_R0
     P1_LI_R0
-    '1A000000'
+    %26
     P1_LI_BR
     &prim_eqp
     P1_BEQ_R3_R0
+    P1_LI_R0
+    %27
+    P1_LI_BR
+    &prim_cons
+    P1_BEQ_R3_R0
+    P1_LI_R0
+    %28
+    P1_LI_BR
+    &prim_car
+    P1_BEQ_R3_R0
+    P1_LI_R0
+    %29
+    P1_LI_BR
+    &prim_cdr
+    P1_BEQ_R3_R0
+    P1_LI_R0
+    %30
+    P1_LI_BR
+    &prim_pairp
+    P1_BEQ_R3_R0
+    P1_LI_R0
+    %31
+    P1_LI_BR
+    &prim_nullp
+    P1_BEQ_R3_R0
+    P1_LI_R0
+    %32
+    P1_LI_BR
+    &prim_list
+    P1_BEQ_R3_R0
+    P1_LI_R0
+    %33
+    P1_LI_BR
+    &prim_length
+    P1_BEQ_R3_R0
+    P1_LI_R0
+    %34
+    P1_LI_BR
+    &prim_listp
+    P1_BEQ_R3_R0
+    P1_LI_R0
+    %35
+    P1_LI_BR
+    &prim_append
+    P1_BEQ_R3_R0
+    P1_LI_R0
+    %36
+    P1_LI_BR
+    &prim_reverse
+    P1_BEQ_R3_R0
+    P1_LI_R0
+    %37
+    P1_LI_BR
+    &prim_assoc
+    P1_BEQ_R3_R0
+    P1_LI_R0
+    %38
+    P1_LI_BR
+    &prim_member
+    P1_BEQ_R3_R0
 
     P1_LI_BR
     &err_bad_prim
@@ -2670,7 +3216,7 @@
 ## to decoded accumulator, retag at end.
 :prim_add
     P1_LI_R3
-    '00000000'                          ## acc = 0
+    %0                          ## acc = 0
     P1_SHLI_R1_R1_3
     P1_ADD_R1_R1_R2                     ## r1 = argv_end
 :prim_add_loop
@@ -2693,7 +3239,7 @@
 ## (- x) negates; (- x y ...) folds subtraction from the left.
 :prim_sub
     P1_LI_R0
-    '01000000'
+    %1
     P1_LI_BR
     &prim_sub_negate
     P1_BEQ_R1_R0                        ## argc == 1 → unary negate
@@ -2723,7 +3269,7 @@
     P1_LD_R3_R2_0
     P1_SARI_R3_R3_3
     P1_LI_R0
-    '00000000'
+    %0
     P1_SUB_R3_R0_R3
     P1_SHLI_R0_R3_3
     P1_ORI_R0_R0_1
@@ -2733,7 +3279,7 @@
 ## (* ...) — variadic product. Identity 1.
 :prim_mul
     P1_LI_R3
-    '01000000'                          ## acc = 1
+    %1                          ## acc = 1
     P1_SHLI_R1_R1_3
     P1_ADD_R1_R1_R2
 :prim_mul_loop
@@ -2789,13 +3335,13 @@
     &prim_true
     P1_BEQ_R3_R0
     P1_LI_R0
-    '17000000'                          ## #f
+    FALSE                          ## #f
     P1_RET
 
 ## Shared "return #t" tail used by comparison/predicate primitives.
 :prim_true
     P1_LI_R0
-    '0F000000'
+    TRUE
     P1_RET
 
 
@@ -2808,7 +3354,7 @@
     &prim_true
     P1_BLT_R3_R0
     P1_LI_R0
-    '17000000'
+    %23
     P1_RET
 
 
@@ -2820,7 +3366,7 @@
     &prim_true
     P1_BLT_R0_R3
     P1_LI_R0
-    '17000000'
+    %23
     P1_RET
 
 
@@ -2832,11 +3378,11 @@
     &prim_le_false
     P1_BLT_R0_R3
     P1_LI_R0
-    '0F000000'                          ## #t
+    TRUE                          ## #t
     P1_RET
 :prim_le_false
     P1_LI_R0
-    '17000000'
+    %23
     P1_RET
 
 
@@ -2848,11 +3394,11 @@
     &prim_ge_false
     P1_BLT_R3_R0
     P1_LI_R0
-    '0F000000'
+    %15
     P1_RET
 :prim_ge_false
     P1_LI_R0
-    '17000000'
+    %23
     P1_RET
 
 
@@ -2860,12 +3406,12 @@
 :prim_zerop
     P1_LD_R3_R2_0
     P1_LI_R0
-    '01000000'
+    %1
     P1_LI_BR
     &prim_true
     P1_BEQ_R3_R0
     P1_LI_R0
-    '17000000'
+    %23
     P1_RET
 
 
@@ -2873,12 +3419,12 @@
 :prim_negativep
     P1_LD_R3_R2_0
     P1_LI_R0
-    '01000000'
+    %1
     P1_LI_BR
     &prim_true
     P1_BLT_R3_R0
     P1_LI_R0
-    '17000000'
+    %23
     P1_RET
 
 
@@ -2886,12 +3432,12 @@
 :prim_positivep
     P1_LD_R3_R2_0
     P1_LI_R0
-    '01000000'
+    %1
     P1_LI_BR
     &prim_true
     P1_BLT_R0_R3
     P1_LI_R0
-    '17000000'
+    %23
     P1_RET
 
 
@@ -2900,7 +3446,7 @@
     P1_LD_R3_R2_0
     P1_SARI_R3_R3_3                     ## decode
     P1_LI_R0
-    '00000000'
+    %0
     P1_LI_BR
     &prim_abs_done
     P1_BLT_R0_R3                        ## 0 < v → already positive
@@ -2971,7 +3517,7 @@
 ## to match the shape of the other variadic bit ops.
 :prim_bitand
     P1_LI_R3
-    '00000000'
+    %0
     P1_ADDI_R3_R3_NEG1                  ## r3 = -1
     P1_SHLI_R1_R1_3
     P1_ADD_R1_R1_R2
@@ -2995,7 +3541,7 @@
 ## (bit-or ...) — identity 0.
 :prim_bitor
     P1_LI_R3
-    '00000000'
+    %0
     P1_SHLI_R1_R1_3
     P1_ADD_R1_R1_R2
 :prim_bitor_loop
@@ -3018,7 +3564,7 @@
 ## (bit-xor ...) — identity 0.
 :prim_bitxor
     P1_LI_R3
-    '00000000'
+    %0
     P1_SHLI_R1_R1_3
     P1_ADD_R1_R1_R2
 :prim_bitxor_loop
@@ -3043,7 +3589,7 @@
     P1_LD_R3_R2_0
     P1_SARI_R3_R3_3
     P1_LI_R0
-    '00000000'
+    %0
     P1_ADDI_R0_R0_NEG1                  ## r0 = -1
     P1_SUB_R3_R0_R3                     ## r3 = -1 - r3
     P1_SHLI_R0_R3_3
@@ -3057,11 +3603,9 @@
     P1_SARI_R3_R3_3                     ## r3 = n (decoded)
     P1_LD_R0_R2_8
     P1_SARI_R0_R0_3                     ## r0 = k (decoded, signed)
-    P1_LI_R1
-    '00000000'
     P1_LI_BR
     &prim_ashift_neg
-    P1_BLT_R0_R1                        ## k < 0 → right shift by -k
+    P1_BLTZ_R0                        ## k < 0 → right shift by -k
     P1_SHL_R3_R3_R0
     P1_LI_BR
     &prim_ashift_done
@@ -3080,12 +3624,12 @@
     P1_LD_R3_R2_0
     P1_ANDI_R3_R3_7
     P1_LI_R0
-    '01000000'
+    TAG_FIXNUM
     P1_LI_BR
     &prim_true
     P1_BEQ_R3_R0
     P1_LI_R0
-    '17000000'
+    FALSE
     P1_RET
 
 
@@ -3094,12 +3638,12 @@
     P1_LD_R3_R2_0
     P1_ANDI_R3_R3_7
     P1_LI_R0
-    '05000000'
+    TAG_SYMBOL
     P1_LI_BR
     &prim_true
     P1_BEQ_R3_R0
     P1_LI_R0
-    '17000000'
+    FALSE
     P1_RET
 
 
@@ -3108,12 +3652,12 @@
     P1_LD_R3_R2_0
     P1_ANDI_R3_R3_7
     P1_LI_R0
-    '04000000'
+    TAG_STRING
     P1_LI_BR
     &prim_true
     P1_BEQ_R3_R0
     P1_LI_R0
-    '17000000'
+    FALSE
     P1_RET
 
 
@@ -3122,12 +3666,12 @@
     P1_LD_R3_R2_0
     P1_ANDI_R3_R3_7
     P1_LI_R0
-    '03000000'
+    TAG_VECTOR
     P1_LI_BR
     &prim_true
     P1_BEQ_R3_R0
     P1_LI_R0
-    '17000000'
+    FALSE
     P1_RET
 
 
@@ -3140,7 +3684,7 @@
     P1_MOV_R0_R3
     P1_ANDI_R0_R0_7
     P1_LI_R1
-    '06000000'
+    TAG_PROC
     P1_LI_BR
     &prim_procp_false
     P1_BNE_R0_R1                        ## tag != 6 → #f
@@ -3148,23 +3692,23 @@
     P1_ADDI_R3_R3_NEG6                  ## strip tag
     P1_LB_R0_R3_7                       ## r0 = type byte
     P1_LI_R1
-    '04000000'
+    TYPE_CLOSURE
     P1_LI_BR
     &prim_true
     P1_BEQ_R0_R1
     P1_LI_R1
-    '05000000'
+    TYPE_PRIM_FIXED
     P1_LI_BR
     &prim_true
     P1_BEQ_R0_R1
     P1_LI_R1
-    '06000000'
+    TYPE_PRIM_VARIADIC
     P1_LI_BR
     &prim_true
     P1_BEQ_R0_R1
 :prim_procp_false
     P1_LI_R0
-    '17000000'
+    FALSE
     P1_RET
 
 
@@ -3178,7 +3722,332 @@
     &prim_true
     P1_BEQ_R3_R0
     P1_LI_R0
-    '17000000'
+    FALSE
+    P1_RET
+
+
+## ---- Step-10d list-core primitives ---------------------------------
+## (cons a d) — wraps the internal `cons` helper which calls alloc;
+## need PROLOGUE to save lr across the call.
+:prim_cons
+    P1_PROLOGUE
+    P1_LD_R1_R2_0                       ## r1 = car arg
+    P1_LD_R2_R2_8                       ## r2 = cdr arg (uses old r2 base)
+    P1_LI_BR
+    &cons
+    P1_CALL
+    P1_EPILOGUE
+    P1_RET
+
+
+## (car p) — unsafe (no tag check). Inlined: strip 0b010 tag, load +0.
+:prim_car
+    P1_LD_R1_R2_0
+    P1_ADDI_R1_R1_NEG2
+    P1_LD_R0_R1_0
+    P1_RET
+
+
+## (cdr p) — symmetric.
+:prim_cdr
+    P1_LD_R1_R2_0
+    P1_ADDI_R1_R1_NEG2
+    P1_LD_R0_R1_8
+    P1_RET
+
+
+## (pair? x) — tag is 2.
+:prim_pairp
+    P1_LD_R3_R2_0
+    P1_ANDI_R3_R3_7
+    P1_LI_R0
+    TAG_PAIR
+    P1_LI_BR
+    &prim_true
+    P1_BEQ_R3_R0
+    P1_LI_R0
+    %23
+    P1_RET
+
+
+## (null? x) — equals nil singleton (0x07).
+:prim_nullp
+    P1_LD_R3_R2_0
+    P1_LI_R0
+    NIL
+    P1_LI_BR
+    &prim_true
+    P1_BEQ_R3_R0
+    P1_LI_R0
+    %23
+    P1_RET
+
+
+## (list ...) — variadic; build (a b c ...) by walking argv from the
+## tail and consing onto an accumulator (initially nil). Walking from
+## the tail avoids needing a reverse pass.
+:prim_list
+    P1_PROLOGUE_N3
+    P1_MOV_R3_SP
+    P1_LI_R0
+    NIL                          ## nil
+    P1_ST_R0_R3_8                       ## slot1 = accumulator
+    P1_ST_R2_R3_24                      ## slot3 = base
+    P1_SHLI_R1_R1_3                     ## r1 = argc * 8
+    P1_ADD_R1_R1_R2                     ## r1 = end ptr (one past last)
+    P1_ST_R1_R3_16                      ## slot2 = cursor
+:prim_list_loop
+    P1_MOV_R3_SP
+    P1_LD_R0_R3_16                      ## cursor
+    P1_LD_R1_R3_24                      ## base
+    P1_LI_BR
+    &prim_list_done
+    P1_BEQ_R0_R1
+    P1_ADDI_R0_R0_NEG8                  ## cursor -= 8
+    P1_ST_R0_R3_16
+    P1_LD_R1_R0_0                       ## r1 = arg
+    P1_LD_R2_R3_8                       ## r2 = accumulator
+    P1_LI_BR
+    &cons
+    P1_CALL
+    P1_MOV_R3_SP
+    P1_ST_R0_R3_8                       ## accumulator = new pair
+    P1_LI_BR
+    &prim_list_loop
+    P1_B
+:prim_list_done
+    P1_MOV_R3_SP
+    P1_LD_R0_R3_8
+    P1_EPILOGUE_N3
+    P1_RET
+
+
+## (length lst) — count pairs until nil. No proper-list check; an
+## improper or non-list tail will dereference a bogus ptr (matching
+## the seed's "no validation on bad input" stance).
+:prim_length
+    P1_LD_R1_R2_0
+    P1_LI_R3
+    %0
+:prim_length_loop
+    P1_LI_R0
+    %7
+    P1_LI_BR
+    &prim_length_done
+    P1_BEQ_R1_R0
+    P1_ADDI_R0_R1_NEG2
+    P1_LD_R1_R0_8
+    P1_ADDI_R3_R3_1
+    P1_LI_BR
+    &prim_length_loop
+    P1_B
+:prim_length_done
+    P1_SHLI_R0_R3_3
+    P1_ORI_R0_R0_1
+    P1_RET
+
+
+## (list? x) — walks to nil. Returns #t at nil, #f at any non-pair
+## node. No cycle check (per LISP.md §equal? policy).
+:prim_listp
+    P1_LD_R1_R2_0
+:prim_listp_loop
+    P1_LI_R0
+    %7
+    P1_LI_BR
+    &prim_true
+    P1_BEQ_R1_R0
+    P1_MOV_R0_R1
+    P1_ANDI_R0_R0_7
+    P1_LI_R3
+    %2
+    P1_LI_BR
+    &prim_listp_false
+    P1_BNE_R0_R3
+    P1_ADDI_R0_R1_NEG2
+    P1_LD_R1_R0_8
+    P1_LI_BR
+    &prim_listp_loop
+    P1_B
+:prim_listp_false
+    P1_LI_R0
+    %23
+    P1_RET
+
+
+## append_one(r1=xs, r2=ys) -> r0 = xs ++ ys. Copies xs's spine; ys
+## is shared by reference. Recursive — bounded by xs's length.
+:append_one
+    P1_PROLOGUE_N2
+    P1_LI_R0
+    %7
+    P1_LI_BR
+    &append_one_base
+    P1_BEQ_R1_R0
+    P1_MOV_R3_SP
+    P1_ST_R1_R3_8                       ## save xs
+    P1_ST_R2_R3_16                      ## save ys
+    P1_ADDI_R0_R1_NEG2
+    P1_LD_R1_R0_8                       ## r1 = cdr(xs)
+    P1_LI_BR
+    &append_one
+    P1_CALL                             ## r0 = appended tail
+    P1_MOV_R2_R0
+    P1_MOV_R3_SP
+    P1_LD_R0_R3_8
+    P1_ADDI_R0_R0_NEG2
+    P1_LD_R1_R0_0                       ## r1 = car(xs)
+    P1_LI_BR
+    &cons
+    P1_CALL
+    P1_EPILOGUE_N2
+    P1_RET
+:append_one_base
+    P1_MOV_R0_R2
+    P1_EPILOGUE_N2
+    P1_RET
+
+
+## (append ...) — variadic; the last argument is shared (not copied),
+## all earlier arguments have their spines copied. Right-to-left fold.
+:prim_append
+    P1_PROLOGUE_N3
+    P1_LI_BR
+    &prim_append_zero
+    P1_BEQZ_R1
+    P1_MOV_R3_SP
+    P1_ST_R2_R3_8                       ## slot1 = argv base
+    P1_ADDI_R1_R1_NEG1                  ## r1 = argc-1
+    P1_SHLI_R1_R1_3                     ## r1 = (argc-1)*8
+    P1_ADD_R1_R1_R2                     ## r1 = &argv[argc-1]
+    P1_ST_R1_R3_24                      ## slot3 = cursor
+    P1_LD_R0_R1_0                       ## r0 = last arg
+    P1_ST_R0_R3_16                      ## slot2 = result
+:prim_append_loop
+    P1_MOV_R3_SP
+    P1_LD_R0_R3_24                      ## cursor
+    P1_LD_R1_R3_8                       ## base
+    P1_LI_BR
+    &prim_append_done
+    P1_BEQ_R0_R1
+    P1_ADDI_R0_R0_NEG8
+    P1_ST_R0_R3_24
+    P1_LD_R1_R0_0                       ## r1 = arg at cursor
+    P1_LD_R2_R3_16                      ## r2 = result
+    P1_LI_BR
+    &append_one
+    P1_CALL
+    P1_MOV_R3_SP
+    P1_ST_R0_R3_16
+    P1_LI_BR
+    &prim_append_loop
+    P1_B
+:prim_append_done
+    P1_MOV_R3_SP
+    P1_LD_R0_R3_16
+    P1_EPILOGUE_N3
+    P1_RET
+:prim_append_zero
+    P1_LI_R0
+    NIL
+    P1_EPILOGUE_N3
+    P1_RET
+
+
+## (reverse lst) — single-pass cons-reverse onto nil accumulator.
+:prim_reverse
+    P1_PROLOGUE_N2
+    P1_LD_R0_R2_0
+    P1_MOV_R3_SP
+    P1_ST_R0_R3_8                       ## slot1 = current
+    P1_LI_R0
+    %7
+    P1_ST_R0_R3_16                      ## slot2 = accumulator (nil)
+:prim_reverse_loop
+    P1_MOV_R3_SP
+    P1_LD_R0_R3_8
+    P1_LI_R1
+    %7
+    P1_LI_BR
+    &prim_reverse_done
+    P1_BEQ_R0_R1
+    P1_ADDI_R0_R0_NEG2
+    P1_LD_R1_R0_0                       ## r1 = car
+    P1_LD_R2_R0_8                       ## r2 = cdr (next current)
+    P1_MOV_R3_SP
+    P1_ST_R2_R3_8                       ## slot1 = next
+    P1_LD_R2_R3_16                      ## r2 = accumulator
+    P1_LI_BR
+    &cons
+    P1_CALL
+    P1_MOV_R3_SP
+    P1_ST_R0_R3_16
+    P1_LI_BR
+    &prim_reverse_loop
+    P1_B
+:prim_reverse_done
+    P1_MOV_R3_SP
+    P1_LD_R0_R3_16
+    P1_EPILOGUE_N2
+    P1_RET
+
+
+## (assoc key alist) — eq?-keyed alist lookup. Returns the matched
+## (key . val) cell or #f.
+:prim_assoc
+    P1_LD_R3_R2_0                       ## r3 = key
+    P1_LD_R0_R2_8                       ## r0 = alist cursor
+:prim_assoc_loop
+    P1_LI_R1
+    %7
+    P1_LI_BR
+    &prim_assoc_miss
+    P1_BEQ_R0_R1
+    P1_ADDI_R1_R0_NEG2                  ## raw alist cell
+    P1_LD_R2_R1_0                       ## r2 = inner pair (tagged)
+    P1_ADDI_R2_R2_NEG2
+    P1_LD_R2_R2_0                       ## r2 = candidate key
+    P1_LI_BR
+    &prim_assoc_hit
+    P1_BEQ_R2_R3
+    P1_LD_R0_R1_8                       ## advance alist
+    P1_LI_BR
+    &prim_assoc_loop
+    P1_B
+:prim_assoc_hit
+    P1_LD_R0_R1_0                       ## return inner pair
+    P1_RET
+:prim_assoc_miss
+    P1_LI_R0
+    %23
+    P1_RET
+
+
+## (member x lst) — eq?-keyed; returns the first sublist whose car
+## equals x, else #f.
+:prim_member
+    P1_LD_R3_R2_0                       ## r3 = needle
+    P1_LD_R0_R2_8                       ## r0 = list cursor
+:prim_member_loop
+    P1_LI_R1
+    %7
+    P1_LI_BR
+    &prim_member_miss
+    P1_BEQ_R0_R1
+    P1_ADDI_R1_R0_NEG2
+    P1_LD_R2_R1_0                       ## r2 = car
+    P1_LI_BR
+    &prim_member_hit
+    P1_BEQ_R2_R3
+    P1_LD_R0_R1_8                       ## next sublist (tagged)
+    P1_LI_BR
+    &prim_member_loop
+    P1_B
+:prim_member_hit
+    P1_RET                              ## r0 already = current sublist
+:prim_member_miss
+    P1_LI_R0
+    %23
     P1_RET
 
 
@@ -3192,7 +4061,7 @@
     P1_ST_R2_R3_16                      ## slot 2 = env
 
     P1_LI_R2
-    '07000000'
+    %7
     P1_LI_BR
     &eval_self_slot1
     P1_BEQ_R1_R2
@@ -3200,19 +4069,19 @@
     P1_ANDI_R1_R1_7                     ## r1 = tag
 
     P1_LI_R2
-    '01000000'
+    %1
     P1_LI_BR
     &eval_self_slot1
     P1_BEQ_R1_R2                        ## fixnum
 
     P1_LI_R2
-    '05000000'
+    %5
     P1_LI_BR
     &eval_sym
     P1_BEQ_R1_R2
 
     P1_LI_R2
-    '02000000'
+    %2
     P1_LI_BR
     &eval_pair
     P1_BEQ_R1_R2
@@ -3356,7 +4225,7 @@
     P1_CALL                             ## r0 = cond value
 
     P1_LI_R1
-    '07000000'
+    %7
     P1_LI_BR
     &eval_if_else
     P1_BEQ_R0_R1
@@ -3410,7 +4279,7 @@
     P1_MOV_R3_SP
     P1_LD_R1_R3_8
     P1_LI_R2
-    '07000000'
+    %7
     P1_LI_BR
     &eval_begin_empty
     P1_BEQ_R1_R2                        ## cursor == nil → empty begin → nil
@@ -3421,7 +4290,7 @@
     P1_CALL                             ## r0 = next
 
     P1_LI_R1
-    '07000000'
+    %7
     P1_LI_BR
     &eval_begin_tail
     P1_BEQ_R0_R1                        ## next == nil → tail-eval last form
@@ -3464,7 +4333,7 @@
 
 :eval_begin_empty
     P1_LI_R0
-    '07000000'
+    %7
     P1_EPILOGUE_N3
     P1_RET
 
@@ -3544,7 +4413,7 @@
     P1_CALL
 
     P1_LI_R0
-    '07000000'
+    %7
     P1_EPILOGUE_N3
     P1_RET
 
@@ -3554,7 +4423,7 @@
     P1_LI_R1
     &msg_unbound
     P1_LI_R2
-    '0E000000'                          ## strlen("unbound symbol") == 14
+    %14                          ## strlen("unbound symbol") == 14
     P1_LI_BR
     &error
     P1_B
@@ -3563,7 +4432,7 @@
     P1_LI_R1
     &msg_arity
     P1_LI_R2
-    '0E000000'                          ## strlen("arity mismatch") == 14
+    %14                          ## strlen("arity mismatch") == 14
     P1_LI_BR
     &error
     P1_B
@@ -3572,7 +4441,7 @@
     P1_LI_R1
     &msg_not_callable
     P1_LI_R2
-    '0C000000'                          ## strlen("not callable") == 12
+    %12                          ## strlen("not callable") == 12
     P1_LI_BR
     &error
     P1_B
@@ -3581,7 +4450,7 @@
     P1_LI_R1
     &msg_too_many_args
     P1_LI_R2
-    '15000000'                          ## strlen("primitive argc > 32") == 21
+    %21                          ## strlen("primitive argc > 32") == 21
     P1_LI_BR
     &error
     P1_B
@@ -3590,7 +4459,16 @@
     P1_LI_R1
     &msg_bad_prim
     P1_LI_R2
-    '14000000'                          ## strlen("unknown primitive id") == 20
+    %20                          ## strlen("unknown primitive id") == 20
+    P1_LI_BR
+    &error
+    P1_B
+
+:err_path_too_long
+    P1_LI_R1
+    &msg_path_too_long
+    P1_LI_R2
+    %18
     P1_LI_BR
     &error
     P1_B
@@ -3630,6 +4508,8 @@
 "primitive argc > 32"
 :msg_bad_prim
 "unknown primitive id"
+:msg_path_too_long
+"file path too long"
 
 ## Interned name samples used by the self-test.
 :str_foo
@@ -3710,6 +4590,35 @@
 :str_prim_eqp
 "eq?"
 
+## Step-10d list-core names.
+:str_prim_cons
+"cons"
+:str_prim_car
+"car"
+:str_prim_cdr
+"cdr"
+:str_prim_pairp
+"pair?"
+:str_prim_nullp
+"null?"
+:str_prim_list
+"list"
+:str_prim_length
+"length"
+:str_prim_listp
+"list?"
+:str_prim_append
+"append"
+:str_prim_reverse
+"reverse"
+:str_prim_assoc
+"assoc"
+:str_prim_member
+"member"
+
+:prelude_src
+""
+
 
 ## Registration table. 40-byte records: ptr(8) + len(8) + code_id(8) +
 ## type(8) + arity(8). End-sentinel = zero name pointer. _start iterates
@@ -3717,227 +4626,472 @@
 :prim_table
 ## (+ ...) variadic
 &str_prim_plus
-'00000000'
-'0100000000000000'
-'0000000000000000'
-'0600000000000000'
-'0000000000000000'
+%0
+%1
+%0
+%0
+%0
+%6
+%0
+%0
+%0
 ## (- x ...) variadic (fixes unary-negate branch in body)
 &str_prim_minus
-'00000000'
-'0100000000000000'
-'0100000000000000'
-'0600000000000000'
-'0000000000000000'
+%0
+%1
+%0
+%1
+%0
+%6
+%0
+%0
+%0
 ## (* ...) variadic
 &str_prim_mul
-'00000000'
-'0100000000000000'
-'0200000000000000'
-'0600000000000000'
-'0000000000000000'
+%0
+%1
+%0
+%2
+%0
+%6
+%0
+%0
+%0
 ## (/ x y) fixed 2
 &str_prim_div
-'00000000'
-'0100000000000000'
-'0300000000000000'
-'0500000000000000'
-'0200000000000000'
+%0
+%1
+%0
+%3
+%0
+%5
+%0
+%2
+%0
 ## (% x y) fixed 2
 &str_prim_mod
-'00000000'
-'0100000000000000'
-'0400000000000000'
-'0500000000000000'
-'0200000000000000'
+%0
+%1
+%0
+%4
+%0
+%5
+%0
+%2
+%0
 ## (= x y) fixed 2
 &str_prim_numeq
-'00000000'
-'0100000000000000'
-'0500000000000000'
-'0500000000000000'
-'0200000000000000'
+%0
+%1
+%0
+%5
+%0
+%5
+%0
+%2
+%0
 ## (< x y) fixed 2
 &str_prim_lt
-'00000000'
-'0100000000000000'
-'0600000000000000'
-'0500000000000000'
-'0200000000000000'
+%0
+%1
+%0
+%6
+%0
+%5
+%0
+%2
+%0
 ## (> x y) fixed 2
 &str_prim_gt
-'00000000'
-'0100000000000000'
-'0700000000000000'
-'0500000000000000'
-'0200000000000000'
+%0
+%1
+%0
+%7
+%0
+%5
+%0
+%2
+%0
 ## (<= x y) fixed 2
 &str_prim_le
-'00000000'
-'0200000000000000'
-'0800000000000000'
-'0500000000000000'
-'0200000000000000'
+%0
+%2
+%0
+%8
+%0
+%5
+%0
+%2
+%0
 ## (>= x y) fixed 2
 &str_prim_ge
-'00000000'
-'0200000000000000'
-'0900000000000000'
-'0500000000000000'
-'0200000000000000'
+%0
+%2
+%0
+%9
+%0
+%5
+%0
+%2
+%0
 ## (zero? x) fixed 1
 &str_prim_zerop
-'00000000'
-'0500000000000000'
-'0A00000000000000'
-'0500000000000000'
-'0100000000000000'
+%0
+%5
+%0
+%10
+%0
+%5
+%0
+%1
+%0
 ## (negative? x) fixed 1
 &str_prim_negativep
-'00000000'
-'0900000000000000'
-'0B00000000000000'
-'0500000000000000'
-'0100000000000000'
+%0
+%9
+%0
+%11
+%0
+%5
+%0
+%1
+%0
 ## (positive? x) fixed 1
 &str_prim_positivep
-'00000000'
-'0900000000000000'
-'0C00000000000000'
-'0500000000000000'
-'0100000000000000'
+%0
+%9
+%0
+%12
+%0
+%5
+%0
+%1
+%0
 ## (abs x) fixed 1
 &str_prim_abs
-'00000000'
-'0300000000000000'
-'0D00000000000000'
-'0500000000000000'
-'0100000000000000'
+%0
+%3
+%0
+%13
+%0
+%5
+%0
+%1
+%0
 ## (min ...) variadic — arity 0 ignored, but ≥1 enforced by body load
 &str_prim_min
-'00000000'
-'0300000000000000'
-'0E00000000000000'
-'0600000000000000'
-'0000000000000000'
+%0
+%3
+%0
+%14
+%0
+%6
+%0
+%0
+%0
 ## (max ...) variadic
 &str_prim_max
-'00000000'
-'0300000000000000'
-'0F00000000000000'
-'0600000000000000'
-'0000000000000000'
+%0
+%3
+%0
+%15
+%0
+%6
+%0
+%0
+%0
 ## (bit-and ...) variadic
 &str_prim_bitand
-'00000000'
-'0700000000000000'
-'1000000000000000'
-'0600000000000000'
-'0000000000000000'
+%0
+%7
+%0
+%16
+%0
+%6
+%0
+%0
+%0
 ## (bit-or ...) variadic
 &str_prim_bitor
-'00000000'
-'0600000000000000'
-'1100000000000000'
-'0600000000000000'
-'0000000000000000'
+%0
+%6
+%0
+%17
+%0
+%6
+%0
+%0
+%0
 ## (bit-xor ...) variadic
 &str_prim_bitxor
-'00000000'
-'0700000000000000'
-'1200000000000000'
-'0600000000000000'
-'0000000000000000'
+%0
+%7
+%0
+%18
+%0
+%6
+%0
+%0
+%0
 ## (bit-not x) fixed 1
 &str_prim_bitnot
-'00000000'
-'0700000000000000'
-'1300000000000000'
-'0500000000000000'
-'0100000000000000'
+%0
+%7
+%0
+%19
+%0
+%5
+%0
+%1
+%0
 ## (arithmetic-shift n k) fixed 2
 &str_prim_ashift
-'00000000'
-'1000000000000000'
-'1400000000000000'
-'0500000000000000'
-'0200000000000000'
+%0
+%16
+%0
+%20
+%0
+%5
+%0
+%2
+%0
 ## (number? x) fixed 1
 &str_prim_numberp
-'00000000'
-'0700000000000000'
-'1500000000000000'
-'0500000000000000'
-'0100000000000000'
+%0
+%7
+%0
+%21
+%0
+%5
+%0
+%1
+%0
 ## (symbol? x) fixed 1
 &str_prim_symbolp
-'00000000'
-'0700000000000000'
-'1600000000000000'
-'0500000000000000'
-'0100000000000000'
+%0
+%7
+%0
+%22
+%0
+%5
+%0
+%1
+%0
 ## (string? x) fixed 1
 &str_prim_stringp
-'00000000'
-'0700000000000000'
-'1700000000000000'
-'0500000000000000'
-'0100000000000000'
+%0
+%7
+%0
+%23
+%0
+%5
+%0
+%1
+%0
 ## (vector? x) fixed 1
 &str_prim_vectorp
-'00000000'
-'0700000000000000'
-'1800000000000000'
-'0500000000000000'
-'0100000000000000'
+%0
+%7
+%0
+%24
+%0
+%5
+%0
+%1
+%0
 ## (procedure? x) fixed 1
 &str_prim_procp
-'00000000'
-'0A00000000000000'
-'1900000000000000'
-'0500000000000000'
-'0100000000000000'
+%0
+%10
+%0
+%25
+%0
+%5
+%0
+%1
+%0
 ## (eq? x y) fixed 2
 &str_prim_eqp
-'00000000'
-'0300000000000000'
-'1A00000000000000'
-'0500000000000000'
-'0200000000000000'
+%0
+%3
+%0
+%26
+%0
+%5
+%0
+%2
+%0
+## (cons a d) fixed 2
+&str_prim_cons
+%0
+%4
+%0
+%27
+%0
+%5
+%0
+%2
+%0
+## (car p) fixed 1
+&str_prim_car
+%0
+%3
+%0
+%28
+%0
+%5
+%0
+%1
+%0
+## (cdr p) fixed 1
+&str_prim_cdr
+%0
+%3
+%0
+%29
+%0
+%5
+%0
+%1
+%0
+## (pair? x) fixed 1
+&str_prim_pairp
+%0
+%5
+%0
+%30
+%0
+%5
+%0
+%1
+%0
+## (null? x) fixed 1
+&str_prim_nullp
+%0
+%5
+%0
+%31
+%0
+%5
+%0
+%1
+%0
+## (list ...) variadic
+&str_prim_list
+%0
+%4
+%0
+%32
+%0
+%6
+%0
+%0
+%0
+## (length lst) fixed 1
+&str_prim_length
+%0
+%6
+%0
+%33
+%0
+%5
+%0
+%1
+%0
+## (list? x) fixed 1
+&str_prim_listp
+%0
+%5
+%0
+%34
+%0
+%5
+%0
+%1
+%0
+## (append ...) variadic
+&str_prim_append
+%0
+%6
+%0
+%35
+%0
+%6
+%0
+%0
+%0
+## (reverse lst) fixed 1
+&str_prim_reverse
+%0
+%7
+%0
+%36
+%0
+%5
+%0
+%1
+%0
+## (assoc key alist) fixed 2
+&str_prim_assoc
+%0
+%5
+%0
+%37
+%0
+%5
+%0
+%2
+%0
+## (member x lst) fixed 2
+&str_prim_member
+%0
+%6
+%0
+%38
+%0
+%5
+%0
+%2
+%0
 ## End sentinel: zero name pointer.
-'0000000000000000'
-'0000000000000000'
-'0000000000000000'
-'0000000000000000'
-'0000000000000000'
+%0
+%0
+%0
+%0
+%0
+%0
+%0
+%0
+%0
+%0
 
 
 ## ---- Special-form symbol slots --------------------------------------
 ## Zero-initialized; _start populates each slot with the interned
 ## tagged-symbol pointer so eval_pair can dispatch by pointer identity.
 :sym_quote
-'00000000'
-'00000000'
+%0
+%0
 :sym_if
-'00000000'
-'00000000'
+%0
+%0
 :sym_begin
-'00000000'
-'00000000'
+%0
+%0
 :sym_lambda
-'00000000'
-'00000000'
+%0
+%0
 :sym_define
-'00000000'
-'00000000'
+%0
+%0
 
 ## Global-binding alist head. Zero-initialized (which is a valid
 ## untagged pair/nil sentinel? No — nil = 0x07. Seed to nil on entry
 ## from _start; the zero here would be interpreted as a pair pointer
 ## otherwise).
 :global_env_cell
-'07000000'
-'00000000'
+NIL
+%0
 
 
 ## ---- Primitive argv scratch buffer (32 slots × 8B = 256B) -----------
@@ -3946,532 +5100,597 @@
 ## primitives need more. Zeroed so a stray read sees the 0 tagged
 ## sentinel (not a valid value — harmless).
 :prim_argv
-'0000000000000000000000000000000000000000000000000000000000000000'
-'0000000000000000000000000000000000000000000000000000000000000000'
-'0000000000000000000000000000000000000000000000000000000000000000'
-'0000000000000000000000000000000000000000000000000000000000000000'
-'0000000000000000000000000000000000000000000000000000000000000000'
-'0000000000000000000000000000000000000000000000000000000000000000'
-'0000000000000000000000000000000000000000000000000000000000000000'
-'0000000000000000000000000000000000000000000000000000000000000000'
+ZERO32
+ZERO32
+ZERO32
+ZERO32
+ZERO32
+ZERO32
+ZERO32
+ZERO32
+
+## Reader-state save area for eval_source().
+:saved_src_base
+%0
+%0
+:saved_src_len
+%0
+%0
+:saved_src_cursor
+%0
+%0
+:saved_src_line
+%0
+%0
+:saved_src_col
+%0
+%0
+
+## Shared buffers for pathname marshaling, string literal decoding, and
+## file I/O primitives.
+:path_buf
+ZERO32
+ZERO32
+ZERO32
+ZERO32
+ZERO32
+ZERO32
+ZERO32
+ZERO32
+
+:reader_string_buf
+ZERO32
+ZERO32
+ZERO32
+ZERO32
+ZERO32
+ZERO32
+ZERO32
+ZERO32
+ZERO32
+ZERO32
+ZERO32
+ZERO32
+ZERO32
+ZERO32
+ZERO32
+ZERO32
+
+:io_buf
+ZERO32
+ZERO32
+ZERO32
+ZERO32
+ZERO32
+ZERO32
+ZERO32
+ZERO32
+ZERO32
+ZERO32
+ZERO32
+ZERO32
+ZERO32
+ZERO32
+ZERO32
+ZERO32
 
 
 ## ---- Symbol table (4096 slots × 8 bytes = 32 KiB) -------------------
 ## Open-addressing hash table. Empty slot = 0 (no valid tagged value
 ## is 0). LISP.md §GC §Roots makes this a named BSS root.
 :symbol_table
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diff --git a/src/p1_gen.py b/src/p1_gen.py
@@ -428,6 +428,21 @@ class AA64(Encoder):
         br = le32(0xD61F0000 | (NAT_AA64['br'] << 5))
         return cmp_ + bcond + br
 
+    def condbz(self, op, rA):
+        # Branch-if-zero family. BEQZ/BNEZ use CBZ/CBNZ (skip br on
+        # the inverse cond); BLTZ falls back to CMP+B.GE since there's
+        # no single signed-less-than-zero insn.
+        a = NAT_AA64[rA]
+        br = le32(0xD61F0000 | (NAT_AA64['br'] << 5))
+        if op == 'BEQZ':
+            return le32(0xB5000000 | (2 << 5) | a) + br   # CBNZ rA, +8 ; BR
+        if op == 'BNEZ':
+            return le32(0xB4000000 | (2 << 5) | a) + br   # CBZ  rA, +8 ; BR
+        if op == 'BLTZ':
+            cmp_ = le32(0xEB000000 | (31 << 16) | (a << 5) | 31)   # SUBS xzr, rA, xzr
+            bge  = le32(0x54000040 | 10)                            # b.ge +8
+            return cmp_ + bge + br
+
     def call(self):
         return le32(0xD63F0000 | (NAT_AA64['br'] << 5))   # BLR x17
 
@@ -541,6 +556,14 @@ class AMD64(Encoder):
         jop = {'BEQ': '75', 'BNE': '74', 'BLT': '7D'}[op]
         return cmp_ + jop + '03' + '41FFE3'              # jmp r11
 
+    def condbz(self, op, rA):
+        a = NAT_AMD64[rA]
+        # test rA, rA — 85 /r with rA in both slots; sets ZF iff rA == 0,
+        # SF iff rA < 0. Same skip+jmp pattern as condb.
+        test_ = rex(1, a >> 3, 0, a >> 3) + '85' + modrm(3, a, a)
+        jop = {'BEQZ': '75', 'BNEZ': '74', 'BLTZ': '7D'}[op]
+        return test_ + jop + '03' + '41FFE3'             # jmp r11
+
     def call(self):
         return '41FFD3'                                   # call r11
 
@@ -616,6 +639,15 @@ class RV64(Encoder):
         jalr = 0x00000067 | (NAT_RV64['br'] << 15)
         return le32(insn) + le32(jalr)
 
+    def condbz(self, op, rA):
+        # Same shape as condb but rs2 = x0 (zero reg). BEQZ/BNEZ/BLTZ
+        # invert the same way (BNE/BEQ/BGE).
+        a = NAT_RV64[rA]
+        funct3 = {'BEQZ': 1, 'BNEZ': 0, 'BLTZ': 5}[op]
+        insn = 0x00000063 | (funct3 << 12) | (a << 15) | (0 << 20) | (8 << 7)
+        jalr = 0x00000067 | (NAT_RV64['br'] << 15)
+        return le32(insn) + le32(jalr)
+
     def call(self):
         return le32(0x000000E7 | (NAT_RV64['br'] << 15))  # jalr ra, 0(t5)
 
@@ -731,6 +763,13 @@ class CondB(Op):
         return enc.condb(self.op, self.rA, self.rB)
 
 @dataclass
+class CondBZ(Op):
+    op: str = ''          # BEQZ / BNEZ / BLTZ
+    rA: str = ''
+    def encode(self, enc):
+        return enc.condbz(self.op, self.rA)
+
+@dataclass
 class Literal(Op):
     hex_by_arch: Optional[dict] = None
     def encode(self, enc):
@@ -848,8 +887,8 @@ SYS_NUM = {
 ## ---------- Canonical imm/offset/shamt sets -----------------------------
 ## Enumerated instead of sigil-passed: M1's DEFINE substitutes hex
 ## bytes verbatim, so every distinct imm value needs its own DEFINE.
-## These cover every value used across hello/demo/lisp/kaem-minimal
-## plus a little headroom. Extend when a new value appears in P1 src.
+## These cover every value used across hello/demo/lisp plus a little
+## headroom. Extend when a new value appears in P1 src.
 
 ## ADDI imms. NEG48/48 handle the ASCII '0' bias; the rest cover tag
 ## stripping, loop counters, and — at 40 — the primitive-registration
@@ -860,7 +899,7 @@ ADDI_IMMS = (-48, -8, -7, -6, -5, -4, -3, -2, -1,
 ## Shift amounts (for SHLI/SHRI/SARI). 32/52 implement low-N-bit masks
 ## (length field extraction; 4096-slot symbol-table index); the small
 ## values scale-by-N for byte offsets and fixnum encode/decode.
-SHIFT_IMMS = (1, 2, 3, 5, 16, 32, 52)
+SHIFT_IMMS = (1, 2, 3, 5, 13, 16, 32, 52)
 
 ## ANDI/ORI imms. Every entry must appear in AA64_LOGI_ENC.
 LOGI_IMMS = (1, 2, 3, 4, 6, 7, 8)
@@ -871,17 +910,17 @@ LOGI_IMMS = (1, 2, 3, 4, 6, 7, 8)
 ## below the current base.
 MEM_OFFS = (-8, 0, 7, 8, 16, 24, 32)
 
-CONDB_OPS = ('BEQ', 'BNE', 'BLT')
-SHIFT_OPS = ('SHLI', 'SHRI', 'SARI')
-LOGI_OPS  = ('ANDI', 'ORI')
-MEM_OPS   = ('LD', 'ST', 'LB', 'SB')
+CONDB_OPS  = ('BEQ', 'BNE', 'BLT')
+CONDBZ_OPS = ('BEQZ', 'BNEZ', 'BLTZ')
+SHIFT_OPS  = ('SHLI', 'SHRI', 'SARI')
+LOGI_OPS   = ('ANDI', 'ORI')
+MEM_OPS    = ('LD', 'ST', 'LB', 'SB')
 
 
 ## Curated RRR triples. The full cube is 11 ops × 8³ regs = 5632
 ## entries per arch — >99% would be dead weight. Each tuple below
-## is one actually used by hello/demo/lisp/kaem-minimal. Lint
-## catches missing triples on assembly; add a line here and
-## regenerate.
+## is one actually used by hello/demo/lisp. Lint catches missing
+## triples on assembly; add a line here and regenerate.
 RRR_TABLE = (
     # demo/lisp step-1 arith cube
     ('ADD','r1','r1','r2'), ('ADD','r1','r1','r4'),
@@ -898,6 +937,8 @@ RRR_TABLE = (
     ('SAR','r4','r4','r2'),
     # alloc / pointer arithmetic
     ('ADD','r2','r0','r1'),
+    ('ADD','r0','r0','r1'),
+    ('ADD','r0','r0','r2'),
     ('ADD','r0','r0','r3'),
     ('ADD','r2','r2','r0'),
     ('ADD','r2','r2','r1'),
@@ -909,7 +950,8 @@ RRR_TABLE = (
     ('SUB','r2','r1','r6'),
     ('SUB','r3','r1','r6'),
     ('REM','r1','r1','r2'),
-    # kaem-minimal bump-pointer + accumulator updates
+    # bump-pointer + accumulator updates (originally kaem-minimal;
+    # retained in case lisp uses them — lint catches dead entries)
     ('ADD','r1','r1','r0'),
     ('ADD','r5','r5','r0'),
     ('ADD','r7','r7','r0'),
@@ -921,7 +963,7 @@ RRR_TABLE = (
     # (r3 = r0 - r3) with r0 = 0 or -1. arithmetic-shift k-negate:
     # (r0 = r1 - r0) with r1 = 0 after argc is consumed.
     ('ADD','r3','r3','r0'),
-    ## ('SUB','r3','r3','r0') — already above (kaem-minimal row)
+    ## ('SUB','r3','r3','r0') — already above
     ('SUB','r3','r0','r3'),
     ('SUB','r0','r1','r0'),
     ('MUL','r3','r3','r0'),
@@ -1004,6 +1046,14 @@ def rows():
         R.append(Mem(name=f'{op}_{rt.upper()}_{rn.upper()}_{_imm_suf(off)}',
                      op=op, rT=rt, rN=rn, off=off))
 
+    # --- SP-relative memory: LD/ST/LB/SB × P1_REGS × MEM_OFFS ---
+    # Lets callees touch PROLOGUE_N* frame slots directly, skipping the
+    # MOV_Rk_SP trampoline that previously bridged P1 regs to sp-base.
+    R.append(Banner('LD / ST / LB / SB — SP-base × MEM_OFFS'))
+    for op, rt, off in product(MEM_OPS, P1_REGS, MEM_OFFS):
+        R.append(Mem(name=f'{op}_{rt.upper()}_SP_{_imm_suf(off)}',
+                     op=op, rT=rt, rN='sp', off=off))
+
     # --- Branches: BEQ/BNE/BLT × full reg product + unconditional B ---
     R.append(Banner('Branches — LI_BR-indirect pattern'))
     R.append(B(name='B'))
@@ -1011,6 +1061,13 @@ def rows():
         R.append(CondB(name=f'{op}_{a.upper()}_{b.upper()}',
                        op=op, rA=a, rB=b))
 
+    # --- Zero-compare branches: BEQZ/BNEZ/BLTZ × P1_REGS ---
+    # Compare-with-zero is the common case (null pointer, fd<0, EOF,
+    # loop-count exhausted), so we give it a single-insn path that
+    # doesn't consume a scratch reg for the zero operand.
+    for op, a in product(CONDBZ_OPS, P1_REGS):
+        R.append(CondBZ(name=f'{op}_{a.upper()}', op=op, rA=a))
+
     # --- Control: CALL / RET / PROLOGUE / EPILOGUE / TAIL (Nk = 1..4) ---
     R.append(Banner('Control: CALL/RET + single-slot and N-slot PROLOGUE/EPILOGUE/TAIL'))
     R.append(Prologue(name='PROLOGUE', k=1))
diff --git a/tests/lisp/11-list.expected b/tests/lisp/11-list.expected
@@ -0,0 +1 @@
+42
diff --git a/tests/lisp/11-list.scm b/tests/lisp/11-list.scm
@@ -0,0 +1,25 @@
+;; List core: cons car cdr pair? null? list length list? append reverse
+;; assoc member.
+(if (pair? (cons 1 2))
+  (if (= (car (cons 1 2)) 1)
+    (if (= (cdr (cons 1 2)) 2)
+      (if (null? (quote ()))
+        (if (if (null? (cons 1 2)) 0 1)
+          (if (if (pair? (quote ())) 0 1)
+            (if (= (length (list 1 2 3 4)) 4)
+              (if (= (length (quote ())) 0)
+                (if (list? (list 1 2 3))
+                  (if (list? (quote ()))
+                    (if (if (list? 42) 0 1)
+                      (if (= (length (append (list 1 2) (list 3 4))) 4)
+                        (if (= (car (append (list 1 2) (list 3 4))) 1)
+                          (if (= (length (reverse (list 1 2 3))) 3)
+                            (if (= (car (reverse (list 1 2 3))) 3)
+                              (if (= (cdr (assoc (quote b)
+                                                 (list (cons (quote a) 1)
+                                                       (cons (quote b) 2)))) 2)
+                                (if (if (assoc (quote z)
+                                               (list (cons (quote a) 1))) 0 1)
+                                  (if (= (car (member 3 (list 1 2 3 4))) 3)
+                                    (if (if (member 99 (list 1 2 3)) 0 1)
+                                      42 0) 0) 0) 0) 0) 0) 0) 0) 0) 0) 0) 0) 0) 0) 0) 0) 0) 0) 0)
diff --git a/tests/lisp/12-string.expected b/tests/lisp/12-string.expected
@@ -0,0 +1 @@
+42
diff --git a/tests/lisp/12-string.scm b/tests/lisp/12-string.scm
@@ -0,0 +1,9 @@
+;; String core: string-length string-ref substring string-append
+;; string->symbol symbol->string and equal? on strings.
+(if (= (string-length "abcd") 4)
+  (if (= (string-ref "abcd" 2) 99)
+    (if (equal? (substring "abcdef" 1 4) "bcd")
+      (if (equal? (string-append "ab" "cd" "") "abcd")
+        (if (eq? (string->symbol "foo") (quote foo))
+          (if (equal? (symbol->string (quote bar)) "bar")
+            42 0) 0) 0) 0) 0)
diff --git a/tests/lisp/13-vector.expected b/tests/lisp/13-vector.expected
@@ -0,0 +1 @@
+42
diff --git a/tests/lisp/13-vector.scm b/tests/lisp/13-vector.scm
@@ -0,0 +1,10 @@
+;; Vector core: make-vector vector-ref vector-set! vector-length
+;; vector->list list->vector.
+(define v (make-vector 3 0))
+(vector-set! v 1 7)
+(if (= (vector-length v) 3)
+  (if (= (vector-ref v 1) 7)
+    (if (equal? (vector->list v) (list 0 7 0))
+      (if (equal? (vector->list (list->vector (list 1 2 3)))
+                  (list 1 2 3))
+        42 0) 0) 0) 0)
diff --git a/tests/lisp/14-io.expected b/tests/lisp/14-io.expected
@@ -0,0 +1,4 @@
+"io:"
+abc
+ok "qq" 7
+42
diff --git a/tests/lisp/14-io.scm b/tests/lisp/14-io.scm
@@ -0,0 +1,12 @@
+;; I/O surface: display write newline format read-file write-file.
+(write "io:")
+(newline)
+(display "abc")
+(newline)
+(format "~a ~s ~d~%" (quote ok) "qq" 7)
+(write-file "build/io-out.txt" "done")
+(if (equal? (read-file "tests/lisp/io-read.txt") "seed")
+  (if (equal? (read-file "build/io-out.txt") "done")
+    42
+    0)
+  0)
diff --git a/tests/lisp/15-list.expected b/tests/lisp/15-list.expected
@@ -0,0 +1 @@
+42
diff --git a/tests/lisp/15-list.scm b/tests/lisp/15-list.scm
@@ -0,0 +1,30 @@
+;; Step-10d list-core primitives:
+;; cons car cdr pair? null? list length list? append reverse assoc member.
+;;
+;; `list?` walks to nil with no cycle check (per §equal? policy);
+;; `assoc`/`member` use eq? (pointer identity) — fine for symbols and
+;; small fixnums in this seed. The (if (if X 0 1) NEXT 0) idiom asserts
+;; that X is #f.
+(if (pair? (cons 1 2))
+  (if (= (car (cons 1 2)) 1)
+    (if (= (cdr (cons 1 2)) 2)
+      (if (null? (quote ()))
+        (if (if (null? (cons 1 2)) 0 1)
+          (if (if (pair? (quote ())) 0 1)
+            (if (= (length (list 1 2 3 4)) 4)
+              (if (= (length (quote ())) 0)
+                (if (list? (list 1 2 3))
+                  (if (list? (quote ()))
+                    (if (if (list? 42) 0 1)
+                      (if (= (length (append (list 1 2) (list 3 4))) 4)
+                        (if (= (car (append (list 1 2) (list 3 4))) 1)
+                          (if (= (length (reverse (list 1 2 3))) 3)
+                            (if (= (car (reverse (list 1 2 3))) 3)
+                              (if (= (cdr (assoc (quote b)
+                                                 (list (cons (quote a) 1)
+                                                       (cons (quote b) 2)))) 2)
+                                (if (if (assoc (quote z)
+                                               (list (cons (quote a) 1))) 0 1)
+                                  (if (= (car (member 3 (list 1 2 3 4))) 3)
+                                    (if (if (member 99 (list 1 2 3)) 0 1)
+                                      42 0) 0) 0) 0) 0) 0) 0) 0) 0) 0) 0) 0) 0) 0) 0) 0) 0) 0) 0)
diff --git a/tests/lisp/15-pred.expected b/tests/lisp/15-pred.expected
@@ -0,0 +1 @@
+42
diff --git a/tests/lisp/15-pred.scm b/tests/lisp/15-pred.scm
@@ -0,0 +1,11 @@
+;; Predicates, equal?, and Scheme-level apply.
+(if (number? 1)
+  (if (symbol? (quote foo))
+    (if (string? "x")
+      (if (vector? (make-vector 1 0))
+        (if (procedure? +)
+          (if (eq? (quote foo) (string->symbol "foo"))
+            (if (equal? (list 1 (cons 2 3))
+                        (list 1 (cons 2 3)))
+              (if (= (apply + 1 2 (list 3 4)) 10)
+                42 0) 0) 0) 0) 0) 0) 0)
diff --git a/tests/lisp/16-prelude.expected b/tests/lisp/16-prelude.expected
@@ -0,0 +1 @@
+42
diff --git a/tests/lisp/16-prelude.scm b/tests/lisp/16-prelude.scm
@@ -0,0 +1,7 @@
+;; Prelude gate: map filter fold are embedded and evaluated before the
+;; user program starts.
+(if (= (car (map (lambda (x) (+ x 1)) (list 1 2 3))) 2)
+  (if (= (car (cdr (map (lambda (x) (+ x 1)) (list 1 2 3)))) 3)
+    (if (= (length (filter positive? (list 0 3 4))) 2)
+      (if (= (fold + 0 (list 1 2 3 4)) 10)
+        42 0) 0) 0) 0)
diff --git a/tests/lisp/io-read.txt b/tests/lisp/io-read.txt
@@ -0,0 +1 @@
+seed

	boot2 Playing with the boostrap
	git clone https://git.ryansepassi.com/git/boot2.git
	Log \| Files \| Refs

M	Makefile	\|	10	+++++++++-
M	src/lisp.M1	\|	4319	+++++++++++++++++++++++++++++++++++++++++++++++++++----------------------------
M	src/p1_gen.py	\|	81	+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++------------
A	tests/lisp/11-list.expected	\|	1	+
A	tests/lisp/11-list.scm	\|	25	+++++++++++++++++++++++++
A	tests/lisp/12-string.expected	\|	1	+
A	tests/lisp/12-string.scm	\|	9	+++++++++
A	tests/lisp/13-vector.expected	\|	1	+
A	tests/lisp/13-vector.scm	\|	10	++++++++++
A	tests/lisp/14-io.expected	\|	4	++++
A	tests/lisp/14-io.scm	\|	12	++++++++++++
A	tests/lisp/15-list.expected	\|	1	+
A	tests/lisp/15-list.scm	\|	30	++++++++++++++++++++++++++++++
A	tests/lisp/15-pred.expected	\|	1	+
A	tests/lisp/15-pred.scm	\|	11	+++++++++++
A	tests/lisp/16-prelude.expected	\|	1	+
A	tests/lisp/16-prelude.scm	\|	7	+++++++
A	tests/lisp/io-read.txt	\|	1	+