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mcd, tentative fix for hanging

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This commit is contained in:
kub 2020-11-19 00:05:22 +01:00
parent ed9c0413ee
commit 1a95ce340b
1 changed files with 7 additions and 0 deletions
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7
pico/cd/memory.c
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@ -230,6 +230,13 @@ write_comm:
pcd_sync_s68k(SekCyclesDone(), 0); pcd_sync_s68k(SekCyclesDone(), 0);
Pico_mcd->s68k_regs[a] = d; Pico_mcd->s68k_regs[a] = d;
if (a == 0x03) {
// There are cases when master checks for successful switching of RAM to
// slave. This can produce race conditions where slave switches RAM back to
// master while master is delayed by interrupt before the check executes.
// Delay slave a bit to make sure master can check before slave changes.
SekCycleCntS68k += 24;
}
if (Pico_mcd->m.s68k_poll_a == (a & ~1)) if (Pico_mcd->m.s68k_poll_a == (a & ~1))
{ {
if (Pico_mcd->m.s68k_poll_cnt > POLL_LIMIT) { if (Pico_mcd->m.s68k_poll_cnt > POLL_LIMIT) {