claunia/86Box
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

PIT: add alternative faster PIT

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

16
src/machine/m_pcjr.c
View File

@@ -627,7 +627,7 @@ kbd_write(uint16_t port, uint8_t val, void *priv)
speaker_enable = val & 2;
if (speaker_enable)
was_speaker_enable = 1;
pit_ctr_set_gate(&pit->counters[2], val & 1);
pit_devs[0].set_gate(pit_devs[0].data, 2, val & 1);
sn76489_mute = speaker_mute = 1;
switch (val & 0x60) {
case 0x00:
@@ -642,7 +642,7 @@ kbd_write(uint16_t port, uint8_t val, void *priv)
case 0xa0:
nmi_mask = val & 0x80;
pit_ctr_set_using_timer(&pit->counters[1], !(val & 0x20));
pit_devs[0].set_using_timer(pit_devs[0].data, 1, !(val & 0x20));
break;
}
}
@@ -770,6 +770,18 @@ speed_changed(void *priv)
recalc_timings(pcjr);
}
void
pit_irq0_timer_pcjr(int new_out, int old_out)
{
if (new_out && !old_out) {
picint(1);
pit_devs[0].ctr_clock(pit_devs[0].data, 1);
}
if (!new_out)
picintc(1);
}
static const device_config_t pcjr_config[] = {
{
.name = "display_type",