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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 /src/kdata.asm | |
| 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 'src/kdata.asm')
| -rw-r--r-- | src/kdata.asm | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/kdata.asm b/src/kdata.asm index 6333f38..eece708 100644 --- a/src/kdata.asm +++ b/src/kdata.asm @@ -57,6 +57,9 @@ wFsSlashPtr::DS 2 ; last '/' seen while splitting a path wListDir:: DS 1 ; directory sys_list enumerates wKChar:: DS 1 ; scratch for KPutc wConInSkip:: DS 1 ; console input: mid-SLIP-frame? (skip net packets) +wSleepTarget::DS 1 ; sys_sleep: target in 1/64-second units +wSleepAcc:: DS 2 ; sys_sleep: accumulated DIV ticks +wSleepLastDiv::DS 1 ; sys_sleep: previous DIV reading wKillParent::DS 1 ; scratch for sys_kill wPsBuf:: DS 2 ; scratch for sys_ps wPnStart:: DS 2 ; scratch for sys_progname |