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cd sync improvements, part2

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This commit is contained in:
notaz 2013-08-27 03:39:38 +03:00
parent bc3c13d329
commit 08769494e8
6 changed files with 159 additions and 161 deletions
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32
pico/cd/pico.c
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@ -219,19 +219,20 @@ static void pcd_run_events(unsigned int until)
oldest, event_time_next);
}
void pcd_sync_s68k(unsigned int m68k_target)
int pcd_sync_s68k(unsigned int m68k_target, int m68k_poll_sync)
{
#define now SekCycleCntS68k
unsigned int s68k_target =
(unsigned long long)m68k_target * m68k_cycle_mult >> 16;
unsigned int target;
elprintf(EL_CD, "s68k sync to %u/%u", m68k_target, s68k_target);
elprintf(EL_CD, "s68k sync to %u, %u->%u",
m68k_target, now, s68k_target);
if ((Pico_mcd->m.busreq & 3) != 1) { /* busreq/reset */
SekCycleCntS68k = SekCycleAimS68k = s68k_target;
pcd_run_events(m68k_target);
return;
return 0;
}
while (CYCLES_GT(s68k_target, now)) {
@ -243,13 +244,36 @@ void pcd_sync_s68k(unsigned int m68k_target)
target = event_time_next;
SekRunS68k(target);
if (m68k_poll_sync && Pico_mcd->m.m68k_poll_cnt == 0)
break;
}
return s68k_target - now;
#undef now
}
static void SekSyncM68k(void);
static void pcd_run_cpus(int m68k_cycles)
{
SekCycleAim += m68k_cycles;
if (Pico_mcd->m.m68k_poll_cnt >= 16 && !SekShouldInterrupt()) {
int s68k_left = pcd_sync_s68k(SekCycleAim, 1);
if (s68k_left <= 0) {
elprintf(EL_CDPOLL, "m68k poll [%02x] %d @%06x",
Pico_mcd->m.m68k_poll_a, Pico_mcd->m.m68k_poll_cnt, SekPc);
SekCycleCnt = SekCycleAim;
return;
}
SekCycleCnt = SekCycleAim - (s68k_left * 40220 >> 16);
}
SekSyncM68k();
}
#define PICO_CD
#define CPUS_RUN(m68k_cycles) \
SekRunM68k(m68k_cycles)
pcd_run_cpus(m68k_cycles)
#include "../pico_cmn.c"