diff options
| author | user <user@clank> | 2026-07-17 01:39:29 +0200 |
|---|---|---|
| committer | user <user@clank> | 2026-07-17 01:39:29 +0200 |
| commit | c4b9a1b1c4f8c211f765a089b34b66a2d046f3be (patch) | |
| tree | 2f9245dc8c0741a8e547cc8ae77073cf2d5c56d9 /include/gbos.inc | |
| parent | net: wget - real HTTP over the link port via the gateway (diff) | |
| download | gbos-c4b9a1b1c4f8c211f765a089b34b66a2d046f3be.tar.gz gbos-c4b9a1b1c4f8c211f765a089b34b66a2d046f3be.tar.xz gbos-c4b9a1b1c4f8c211f765a089b34b66a2d046f3be.zip | |
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', '<alice> hey gameboy!', '<bob> 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.
Diffstat (limited to '')
| -rw-r--r-- | include/gbos.inc | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/include/gbos.inc b/include/gbos.inc index 7103f48..a6467bf 100644 --- a/include/gbos.inc +++ b/include/gbos.inc @@ -128,7 +128,9 @@ DEF SYS_OPENDIR EQU 27 ; point ls at a directory (DE=path -> A=0/$FF) DEF SYS_PIPE EQU 28 ; make a pipe (-> A=read fd; write=A+1) DEF SYS_SSEND EQU 29 ; link-port: transmit one byte (E=byte) DEF SYS_SRECV EQU 30 ; link-port: receive one byte (-> A=byte, blocks) -DEF SYS_MAX EQU 31 +DEF SYS_SRECVNB EQU 31 ; link-port: receive, non-blocking (-> A=byte, CF=none) +DEF SYS_POLLIN EQU 32 ; poll OSK for a typed char (-> A=char or 0) +DEF SYS_MAX EQU 33 ; SYS_KILL (9) is now implemented (B=pid -> A=0/$FF; pid 1 is immortal) ; (SYS_OPEN=4 / SYS_CLOSE=5 are now implemented by the filesystem) @@ -215,5 +217,6 @@ DEF PROG_COUNT EQU 21 DEF PROG_PTEST EQU 22 DEF PROG_NECHO EQU 23 DEF PROG_WGET EQU 24 +DEF PROG_CHAT EQU 25 ENDC |