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32x: add other timing hacks

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For sdram sync, like NJTE.
Still bad, but don't have a better solution for now (or ever?).
This commit is contained in:
notaz 2017-11-28 02:04:08 +02:00
parent 31fbc691a1
commit 6c2041fea0
1 changed files with 6 additions and 3 deletions
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9
pico/32x/32x.c
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@ -422,6 +422,9 @@ void p32x_sync_other_sh2(SH2 *sh2, unsigned int m68k_target)
} }
} }
#define STEP_LS 24
#define STEP_N 440
#define sync_sh2s_normal p32x_sync_sh2s #define sync_sh2s_normal p32x_sync_sh2s
//#define sync_sh2s_lockstep p32x_sync_sh2s //#define sync_sh2s_lockstep p32x_sync_sh2s
@ -451,6 +454,8 @@ void sync_sh2s_normal(unsigned int m68k_target)
target = m68k_target; target = m68k_target;
if (event_time_next && CYCLES_GT(target, event_time_next)) if (event_time_next && CYCLES_GT(target, event_time_next))
target = event_time_next; target = event_time_next;
if (CYCLES_GT(target, now + STEP_N))
target = now + STEP_N;
while (CYCLES_GT(target, now)) while (CYCLES_GT(target, now))
{ {
@ -507,8 +512,6 @@ void sync_sh2s_normal(unsigned int m68k_target)
Pico32x.comm_dirty = 0; Pico32x.comm_dirty = 0;
} }
#define STEP_68K 24
void sync_sh2s_lockstep(unsigned int m68k_target) void sync_sh2s_lockstep(unsigned int m68k_target)
{ {
unsigned int mcycles; unsigned int mcycles;
@ -518,7 +521,7 @@ void sync_sh2s_lockstep(unsigned int m68k_target)
mcycles = ssh2.m68krcycles_done; mcycles = ssh2.m68krcycles_done;
while (mcycles < m68k_target) { while (mcycles < m68k_target) {
mcycles += STEP_68K; mcycles += STEP_LS;
sync_sh2s_normal(mcycles); sync_sh2s_normal(mcycles);
} }
} }