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Interpreter now updates TSC every instruction. Fixes Desert Strike.

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This commit is contained in:
SarahW 2019-05-14 20:32:32 +01:00
commit de3bb62e0c
1 changed files with 5 additions and 1 deletions
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6
src/386.c
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@ -165,6 +165,8 @@ void exec386(int cycs)
// pclog("%i %02X\n", ins, ram[8]); // pclog("%i %02X\n", ins, ram[8]);
while (cycdiff < cycle_period) while (cycdiff < cycle_period)
{ {
int ins_cycles = cycles;
cpu_state.oldpc = cpu_state.pc; cpu_state.oldpc = cpu_state.pc;
cpu_state.op32 = use32; cpu_state.op32 = use32;
@ -212,6 +214,9 @@ void exec386(int cycs)
} }
} }
} }
ins_cycles -= cycles;
tsc += ins_cycles;
cycdiff=oldcyc-cycles; cycdiff=oldcyc-cycles;
if (trap) if (trap)
@ -289,7 +294,6 @@ void exec386(int cycs)
} }
} }
tsc += cycdiff;
if (TIMER_VAL_LESS_THAN_VAL(timer_target, (uint32_t)tsc)) if (TIMER_VAL_LESS_THAN_VAL(timer_target, (uint32_t)tsc))
timer_process(); timer_process();
} }