From 0a77a11e17f697bf797655c4ae87b927432b1f88 Mon Sep 17 00:00:00 2001
From: user <user@clank>
Date: Thu, 16 Jul 2026 00:04:09 +0200
Subject: kernel: implement exec()

- sys_exec(B=program id): look up ProgramTable, point PROC_ROMB at the program's
  ROM text bank, map it into $4000-$7FFF, reset stack, jp to entry (no return)
- programs.asm: two demo programs (ping/pong) ORG'd at the SAME $4000 in banks
  2 and 3 - proves execution is driven purely by PROC_ROMB
- demo: init forks; parent execs PROG_PING (bank2, '1'), child execs PROG_PONG
  (bank3, '2') -> '1212...', 2000/2000 balanced, zero garbage
- README: document exec + text-in-ROM model
---
 src/syscall.asm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/syscall.asm')

diff --git a/src/syscall.asm b/src/syscall.asm
index ca2857c..fd1b213 100644
--- a/src/syscall.asm
+++ b/src/syscall.asm
@@ -40,7 +40,7 @@ SyscallTable:
     dw sys_write                ; 3  WRITE
     dw sys_nosys                ; 4  OPEN  (TODO)
     dw sys_nosys                ; 5  CLOSE (TODO)
-    dw sys_nosys                ; 6  EXEC  (TODO)
+    dw sys_exec                 ; 6  EXEC
     dw sys_nosys                ; 7  WAIT  (TODO)
     dw sys_getpid               ; 8  GETPID
     dw sys_nosys                ; 9  KILL  (TODO)
-- 
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