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PIT: add alternative faster PIT

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This is enabled by default on 486+ CPUs and can be forced disabled/enabled with pit_mode=0/1
This commit is contained in:
Adrien Moulin
2022-07-23 13:38:10 +02:00
parent 23e082aeea
commit 2aa5d8f5b2
26 changed files with 968 additions and 108 deletions
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4
src/pic.c
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@@ -750,8 +750,8 @@ picinterrupt()
pic.interrupt |= 0x40; /* Mark slave pending. */
}
if ((pic.interrupt == 0) && (pit2 != NULL))
pit_ctr_set_gate(&pit2->counters[0], 0);
if ((pic.interrupt == 0) && (pit_devs[1].data != NULL))
pit_devs[1].set_gate(pit_devs[1].data, 0, 0);
/* Two ACK's - do them in a loop to avoid potential compiler misoptimizations. */
for (i = 0; i < 2; i++) {