From c4b9a1b1c4f8c211f765a089b34b66a2d046f3be Mon Sep 17 00:00:00 2001 From: user Date: Fri, 17 Jul 2026 01:39:29 +0200 Subject: net: chat client - async receive + OSK send over the link port The application layer of the link-port demo, and it ties the whole system together: the LCD terminal displays, the on-screen keyboard types, and the link port carries a live chat. Kernel: sys_srecv_nb (non-blocking link receive; A=byte, CF=none) and sys_pollin (poll the OSK for a typed char without blocking) - syscalls 31/32. Both are what a poll loop needs to receive and type at once. Userland: c/chat.c runs a poll loop - it feeds non-blocking bytes through a SLIP receive state machine and prints whole incoming frames as messages, while pollin() drives the on-screen keyboard; SELECT shows the keys, type a line, START sends it as a frame. libc srecv_nb()/pollin(). Host: tools/gateway.py --mode chat is a simple bot peer (echoes each GB message and injects a few async ones); --keys can drive the OSK for tests. Verified: the gateway pushes 'welcome', ' hey gameboy!', ' nice link cable' unprompted and the GB displays all three (async receive); typing 'hi' on the OSK echoes it and emits the SLIP frame \xC0hi\xC0 (send). A Game Boy in the chat, keyboard on screen, over the link cable. --- src/programs.asm | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'src/programs.asm') diff --git a/src/programs.asm b/src/programs.asm index fbe6067..180f551 100644 --- a/src/programs.asm +++ b/src/programs.asm @@ -115,6 +115,9 @@ ProgNecho: SECTION "prog_wget", ROMX[$4000], BANK[26] ProgWget: INCBIN "c/wget.bin" +SECTION "prog_chat", ROMX[$4000], BANK[27] +ProgChat: + INCBIN "c/chat.bin" ; ----------------------------------------------------------------------------- ; PROG_SH (bank 3) - the shell, now written in C (c/sh.c): parses >/ program id, searched by sys_lookup. @@ -263,4 +268,6 @@ NameTable:: db PROG_NECHO db "wget", 0 db PROG_WGET + db "chat", 0 + db PROG_CHAT db 0 -- cgit v1.3.1-sl0p