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mcd, improve polling detection

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This commit is contained in:
kub 2021-05-14 16:50:13 +02:00
parent ca1b77e601
commit fbebab6934
2 changed files with 18 additions and 11 deletions
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16
pico/cd/mcd.c
View file

@ -281,7 +281,8 @@ void pcd_irq_s68k(int irq, int state)
{
if (state) {
SekInterruptS68k(irq);
SekSetStopS68k(0);
if (SekIsStoppedS68k())
SekSetStopS68k(0);
Pico_mcd->m.s68k_poll_a = 0;
} else
SekInterruptClearS68k(irq);
@ -342,21 +343,24 @@ void pcd_run_cpus_normal(int m68k_cycles)
#ifdef USE_POLL_DETECT
if (Pico_mcd->m.m68k_poll_cnt >= 16) {
int s68k_left;
// main CPU is polling, (wake and) run sub only
SekSetStopS68k(0);
pcd_sync_s68k(Pico.t.m68c_aim, 1);
if (SekIsStoppedS68k())
SekSetStopS68k(0);
s68k_left = pcd_sync_s68k(Pico.t.m68c_aim, 1);
Pico.t.m68c_cnt = Pico.t.m68c_aim;
if (s68k_left > 0)
Pico.t.m68c_cnt -= ((long long)s68k_left * mcd_s68k_cycle_mult >> 16);
if (SekIsStoppedS68k()) {
// slave has stopped, wake master to avoid lockups
Pico_mcd->m.m68k_poll_cnt = 0;
}
elprintf(EL_CDPOLL, "m68k poll [%02x] x%d @%06x",
Pico_mcd->m.m68k_poll_a, Pico_mcd->m.m68k_poll_cnt, SekPc);
}
} else
#endif
SekRunM68kOnce();
SekRunM68kOnce();
if (Pico_mcd->m.need_sync) {
Pico_mcd->m.need_sync = 0;
pcd_sync_s68k(Pico.t.m68c_cnt, 0);

13
pico/cd/memory.c
View file

@ -144,6 +144,8 @@ void m68k_reg_write8(u32 a, u32 d)
u32 dold;
a &= 0x3f;
Pico_mcd->m.m68k_poll_cnt = 0;
switch (a) {
case 0:
d &= 1;
@ -180,8 +182,7 @@ void m68k_reg_write8(u32 a, u32 d)
return;
case 2:
elprintf(EL_CDREGS, "m68k: prg wp=%02x", d);
Pico_mcd->s68k_regs[2] = d; // really use s68k side register
return;
goto write_comm;
case 3:
dold = Pico_mcd->s68k_regs[3];
elprintf(EL_CDREG3, "m68k_regs w3: %02x @%06x", (u8)d, SekPc);
@ -331,7 +332,7 @@ u32 s68k_reg_read16(u32 a)
d = (Pico_mcd->s68k_regs[a]<<8) | Pico_mcd->s68k_regs[a+1];
if (a >= 0x0e && a < 0x20)
if (a >= 0x0e && a < 0x30)
return s68k_poll_detect(a, d);
return d;
@ -494,6 +495,8 @@ void s68k_reg_write16(u32 a, u32 d)
{
u8 *r = Pico_mcd->s68k_regs;
Pico_mcd->m.s68k_poll_cnt = 0;
if ((a & 0x1f0) == 0x20)
goto write_comm;
@ -501,8 +504,8 @@ void s68k_reg_write16(u32 a, u32 d)
case 0x0e:
// special case, 2 byte writes would be handled differently
// TODO: verify
r[0xf] = d;
return;
d = (u8)d | (r[0xe] << 8);
goto write_comm;
case 0x58: // stamp data size
r[0x59] = d & 7;
return;