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| author | user <user@clank> | 2026-07-17 13:43:10 +0200 |
|---|---|---|
| committer | user <user@clank> | 2026-07-17 13:43:10 +0200 |
| commit | b52f37602968768901d2dd83ccf966d953a532f0 (patch) | |
| tree | d497c52bf672291d1cd9cf0579b6191155cb56d4 /c/gbos.h | |
| parent | net: keep network packets out of the console (fixes shell garbage on netboot) (diff) | |
| download | gbos-b52f37602968768901d2dd83ccf966d953a532f0.tar.gz gbos-b52f37602968768901d2dd83ccf966d953a532f0.tar.xz gbos-b52f37602968768901d2dd83ccf966d953a532f0.zip | |
kernel: sys_sleep - a cooperative delay off the DIV timer (+ ping pacing)
There was no time source at all (IRQ vectors just reti; scheduler is purely
cooperative). The DIV register (FF04) free-runs at 16384 Hz regardless of
interrupts, so sys_sleep accumulates DIV deltas across SchedYields (other procs
keep running) until the requested number of 1/64-second units elapse.
- SYS_SLEEP(34): B = 1/64s units; libc gsleep(units) / msleep(ms) wrappers.
- ping now msleep(800) between echoes, so it paces like real ping instead of
blasting all four at once.
Verified real-time (capped emulator): replies land ~0.85s apart. In --uncapped
runs the delay is GB-time (fast wall-clock), as expected.
Diffstat (limited to '')
| -rw-r--r-- | c/gbos.h | 2 |
1 files changed, 2 insertions, 0 deletions
@@ -18,6 +18,8 @@ unsigned char srecv(void); /* link-port: receive one byte (blocks) int srecv_nb(void); /* link-port: receive, or -1 if none */ unsigned char pollin(void); /* poll OSK for a typed char, or 0 */ unsigned char sys_net(void *req); /* socket layer trap (see sock.h) */ +void gsleep(unsigned char units); /* delay units*(1/64)s (raw trap) */ +void msleep(unsigned int ms); /* delay ~ms milliseconds */ /* helpers (c/libc.c) */ void putu(unsigned int n); /* print decimal */ |