From d5c06116d3d1257b46c476cf73b634cf089bcb82 Mon Sep 17 00:00:00 2001
From: user <user@clank>
Date: Thu, 16 Jul 2026 00:31:27 +0200
Subject: wip: sys_read + serial console shell (read-store bug under
 investigation)

- sys_read (SYS_READ): blocking console input via external-clock serial poll;
  yields while waiting. Verified working (direct-echo cat: 'hi' -> 'hi').
- shell (PROG_SH): prompt/read/parse/fork+exec+wait; worker+hello programs;
  StrEqual/SkipName helpers; command table.
- init now execs the shell.
- KNOWN BUG: storing the typed char to the line buffer at $A000 (cart RAM of an
  exec'd program) corrupts the following sys_read; sys_write reading $A000 also
  returns $3E. Kernel syscalls themselves are correct; isolating the cart-RAM /
  exec RAM-bank interaction next.
---
 include/gbos.inc | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'include')

diff --git a/include/gbos.inc b/include/gbos.inc
index 7919bd6..f398c12 100644
--- a/include/gbos.inc
+++ b/include/gbos.inc
@@ -90,5 +90,7 @@ DEF SYS_MAX     EQU 12
 ; Program table indices (see programs.asm). exec() takes one of these in B.
 ; -----------------------------------------------------------------------------
 DEF PROG_WORKER EQU 0
+DEF PROG_SH     EQU 1
+DEF PROG_HELLO  EQU 2
 
     ENDC
-- 
cgit v1.3.1-sl0p