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Finalizing breakpoint architecture, correcting CPU conditions, tweaking top-level emulation logic

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GuyPerfect
2020-12-17 15:40:37 -06:00
parent 826e921dac
commit e13c56e1e7
12 changed files with 1527 additions and 1889 deletions
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src/core/cpu.c
+4 -3
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@@ -436,7 +436,7 @@ static int8_t cpuTestCondition(Vue *vue, int32_t condition) {
case 3: return vue->cpu.psw_cy | vue->cpu.psw_z;
case 4: return vue->cpu.psw_s;
case 5: return 1;
case 6: return vue->cpu.psw_ov | vue->cpu.psw_s;
case 6: return vue->cpu.psw_ov ^ vue->cpu.psw_s;
case 7: return (vue->cpu.psw_ov ^ vue->cpu.psw_s) | vue->cpu.psw_z;
}
return cpuTestCondition(vue, condition & 7) ^ 1;
@@ -1174,8 +1174,8 @@ static vbool cpuException(Vue *vue) {
/* Process the simulation */
static void cpuEmulate(Vue *vue, int32_t cycles) {
/* The CPU is in permanent halt */
if (vue->cpu.stage == CPU_FATAL)
/* The CPU is halting */
if (vue->cpu.stage == CPU_FATAL || vue->cpu.stage == CPU_HALT)
return;
vue->cpu.cycles = 0; /* DEBUG: Stop processing after execute */
@@ -1190,6 +1190,7 @@ vue->cpu.cycles = 0; /* DEBUG: Stop processing after execute */
}
/* Processing by stage */
vue->cpu.cycles = 0;
switch (vue->cpu.stage) {
case CPU_EXCEPTION: if (cpuException (vue)) return; break;
case CPU_EXECUTE : if (cpuExecute (vue)) return; break;