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Some changes in preparation for the not yet committable PAS16 changes.

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This commit is contained in:
OBattler
2024-03-27 19:55:34 +01:00
parent 7a4a44d1d1
commit f48b710206
6 changed files with 97 additions and 19 deletions
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53
src/pit.c
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@@ -48,6 +48,7 @@ pit_intf_t pit_devs[2];
double cpuclock;
double PITCONSTD;
double PAS16CONSTD;
double PAS16CONST2D;
double SYSCLK;
double isa_timing;
double bus_timing;
@@ -58,6 +59,7 @@ double AGPCLK;
uint64_t PITCONST;
uint64_t PAS16CONST;
uint64_t PAS16CONST2;
uint64_t ISACONST;
uint64_t CGACONST;
uint64_t MDACONST;
@@ -309,7 +311,7 @@ ctr_tick(ctr_t *ctr, void *priv)
}
}
static void
void
ctr_clock(void *data, int counter_id)
{
pit_t *pit = (pit_t *) data;
@@ -535,8 +537,9 @@ pit_write(uint16_t addr, uint8_t val, void *priv)
int t = (addr & 3);
ctr_t *ctr;
if ((dev->flags & (PIT_8254 | PIT_EXT_IO)))
if ((dev->flags & (PIT_8254 | PIT_EXT_IO))) {
pit_log("[%04X:%08X] pit_write(%04X, %02X, %08X)\n", CS, cpu_state.pc, addr, val, priv);
}
switch (addr & 3) {
case 3: /* control */
@@ -552,8 +555,9 @@ pit_write(uint16_t addr, uint8_t val, void *priv)
ctr_latch_count(&dev->counters[1]);
if (val & 8)
ctr_latch_count(&dev->counters[2]);
if ((dev->flags & (PIT_8254 | PIT_EXT_IO)))
if ((dev->flags & (PIT_8254 | PIT_EXT_IO))) {
pit_log("PIT %i: Initiated readback command\n", t);
}
}
if (!(val & 0x10)) {
if (val & 2)
@@ -570,9 +574,10 @@ pit_write(uint16_t addr, uint8_t val, void *priv)
if (!(dev->ctrl & 0x30)) {
ctr_latch_count(ctr);
if ((dev->flags & (PIT_8254 | PIT_EXT_IO)))
if ((dev->flags & (PIT_8254 | PIT_EXT_IO))) {
pit_log("PIT %i: Initiated latched read, %i bytes latched\n",
t, ctr->latched);
}
} else {
ctr->ctrl = val;
ctr->rm = ctr->wm = (ctr->ctrl >> 4) & 3;
@@ -584,13 +589,15 @@ pit_write(uint16_t addr, uint8_t val, void *priv)
ctr_set_out(ctr, !!ctr->m, dev);
ctr->state = 0;
if (ctr->latched) {
if ((dev->flags & (PIT_8254 | PIT_EXT_IO)))
if ((dev->flags & (PIT_8254 | PIT_EXT_IO))) {
pit_log("PIT %i: Reload while counter is latched\n", t);
}
ctr->rl--;
}
if ((dev->flags & (PIT_8254 | PIT_EXT_IO)))
if ((dev->flags & (PIT_8254 | PIT_EXT_IO))) {
pit_log("PIT %i: M = %i, RM/WM = %i, State = %i, Out = %i\n", t, ctr->m, ctr->rm, ctr->state, ctr->out);
}
}
}
break;
@@ -608,8 +615,9 @@ pit_write(uint16_t addr, uint8_t val, void *priv)
ctr->l = val;
ctr->lback = ctr->l;
ctr->lback2 = ctr->l;
if ((dev->flags & (PIT_8254 | PIT_EXT_IO)))
if ((dev->flags & (PIT_8254 | PIT_EXT_IO))) {
pit_log("PIT %i (1): Written byte %02X, latch now %04X\n", t, val, ctr->l);
}
if (ctr->m == 0)
ctr_set_out(ctr, 0, dev);
ctr_load(ctr);
@@ -618,8 +626,9 @@ pit_write(uint16_t addr, uint8_t val, void *priv)
ctr->l = (val << 8);
ctr->lback = ctr->l;
ctr->lback2 = ctr->l;
if ((dev->flags & (PIT_8254 | PIT_EXT_IO)))
if ((dev->flags & (PIT_8254 | PIT_EXT_IO))) {
pit_log("PIT %i (2): Written byte %02X, latch now %04X\n", t, val, ctr->l);
}
if (ctr->m == 0)
ctr_set_out(ctr, 0, dev);
ctr_load(ctr);
@@ -630,15 +639,17 @@ pit_write(uint16_t addr, uint8_t val, void *priv)
ctr->l = (ctr->l & 0x00ff) | (val << 8);
ctr->lback = ctr->l;
ctr->lback2 = ctr->l;
if ((dev->flags & (PIT_8254 | PIT_EXT_IO)))
if ((dev->flags & (PIT_8254 | PIT_EXT_IO))) {
pit_log("PIT %i (0x83): Written high byte %02X, latch now %04X\n", t, val, ctr->l);
}
ctr_load(ctr);
} else {
ctr->l = (ctr->l & 0xff00) | val;
ctr->lback = ctr->l;
ctr->lback2 = ctr->l;
if ((dev->flags & (PIT_8254 | PIT_EXT_IO)))
if ((dev->flags & (PIT_8254 | PIT_EXT_IO))) {
pit_log("PIT %i (3): Written low byte %02X, latch now %04X\n", t, val, ctr->l);
}
if (ctr->m == 0) {
ctr->state = 0;
ctr_set_out(ctr, 0, dev);
@@ -774,8 +785,9 @@ pit_read(uint16_t addr, void *priv)
break;
}
if ((dev->flags & (PIT_8254 | PIT_EXT_IO)))
if ((dev->flags & (PIT_8254 | PIT_EXT_IO))) {
pit_log("[%04X:%08X] pit_read(%04X, %08X) = %02X\n", CS, cpu_state.pc, addr, priv, ret);
}
return ret;
}
@@ -855,6 +867,15 @@ ctr_reset(ctr_t *ctr)
ctr->l_det = 0;
}
void
pit_device_reset(pit_t *dev)
{
dev->clock = 0;
for (uint8_t i = 0; i < 3; i++)
ctr_reset(&dev->counters[i]);
}
void
pit_reset(pit_t *dev)
{
@@ -1094,9 +1115,10 @@ pit_ps2_init(int type)
}
void
pit_change_pas16_const(double prescale)
pit_change_pas16_consts(double prescale)
{
PAS16CONST = (uint64_t) ((PITCONSTD / prescale) * (double) (1ULL << 32));
PAS16CONST = (uint64_t) ((PAS16CONSTD / prescale) * (double) (1ULL << 32));
PAS16CONST2 = (uint64_t) ((PAS16CONST2D / prescale) * (double) (1ULL << 32));
}
void
@@ -1195,7 +1217,10 @@ pit_set_clock(uint32_t clock)
TIMER_USEC = (uint64_t) ((cpuclock / 1000000.0) * (double) (1ULL << 32));
PAS16CONSTD = (cpuclock / 441000.0);
PAS16CONST = (uint64_t) (PITCONSTD * (double) (1ULL << 32));
PAS16CONST = (uint64_t) (PAS16CONSTD * (double) (1ULL << 32));
PAS16CONST2D = (cpuclock / 1008000.0);
PAS16CONST2 = (uint64_t) (PAS16CONST2D * (double) (1ULL << 32));
isa_timing = (cpuclock / (double) cpu_isa_speed);
if (cpu_64bitbus)