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mcd, improve polling detection

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This commit is contained in:
kub 2021-05-14 22:55:03 +02:00
parent fbebab6934
commit 5402223466
3 changed files with 9 additions and 5 deletions
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2
pico/cd/mcd.c
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@ -342,7 +342,7 @@ void pcd_run_cpus_normal(int m68k_cycles)
Pico_mcd->m.m68k_poll_cnt = 0;
#ifdef USE_POLL_DETECT
if (Pico_mcd->m.m68k_poll_cnt >= 16) {
if (Pico_mcd->m.m68k_poll_cnt >= 32) {
int s68k_left;
// main CPU is polling, (wake and) run sub only
if (SekIsStoppedS68k())

9
pico/cd/memory.c
View file

@ -63,19 +63,22 @@ static void remap_prg_window(u32 r1, u32 r3);
static void remap_word_ram(u32 r3);
// poller detection
#define POLL_LIMIT 16
#define POLL_LIMIT 32
#define POLL_CYCLES 64
void m68k_comm_check(u32 a)
{
pcd_sync_s68k(SekCyclesDone(), 0);
u32 cycles = SekCyclesDone();
u32 clkdiff = cycles - Pico_mcd->m.m68k_poll_clk;
pcd_sync_s68k(cycles, 0);
if (a >= 0x0e && !Pico_mcd->m.need_sync) {
// there are cases when slave updates comm and only switches RAM
// over after that (mcd1b), so there must be a resync..
SekEndRun(64);
Pico_mcd->m.need_sync = 1;
}
if (SekNotPolling || a != Pico_mcd->m.m68k_poll_a) {
Pico_mcd->m.m68k_poll_clk = cycles;
if (SekNotPolling || a != Pico_mcd->m.m68k_poll_a || clkdiff > POLL_CYCLES) {
Pico_mcd->m.m68k_poll_a = a;
Pico_mcd->m.m68k_poll_cnt = 0;
SekNotPolling = 0;

3
pico/pico_int.h
View file

@ -491,7 +491,8 @@ struct mcd_misc
unsigned char dmna_ret_2m;
unsigned char need_sync;
unsigned char pad3;
int pad4[9];
unsigned int m68k_poll_clk;
int pad4[8];
};
typedef struct