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6502-emu
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Added -f flag to step through emulation at max possible speed (i.e. without the delay loop)

This commit is contained in:
Rob McMullen 2017-12-19 14:59:28 -08:00
parent 649b7f8349
commit a25ad398e8
1 changed files with 9 additions and 5 deletions
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14
6502-emu.c
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@ -19,7 +19,7 @@ void step_delay()
nanosleep(&req, &rem);
}
void run_cpu(long cycle_stop, int verbose, int mem_dump, int break_pc)
void run_cpu(long cycle_stop, int verbose, int mem_dump, int break_pc, int fast)
{
long cycles = 0;
int cycles_per_step = (CPU_FREQ / (ONE_SECOND / STEP_DURATION));
@ -37,7 +37,7 @@ void run_cpu(long cycle_stop, int verbose, int mem_dump, int break_pc)
goto end;
}
}
step_delay(); // remove this for more speed
if (!fast) step_delay();
}
end:
return;
@ -70,7 +70,7 @@ int hextoint(char *str) {
int main(int argc, char *argv[])
{
int a, x, y, sp, sr, pc, load_addr;
int verbose, interactive, mem_dump, break_pc;
int verbose, interactive, mem_dump, break_pc, fast;
long cycles;
int opt;
@ -80,13 +80,14 @@ int main(int argc, char *argv[])
cycles = 0;
load_addr = 0xC000;
break_pc = -1;
fast = 0;
a = 0;
x = 0;
y = 0;
sp = 0;
sr = 0;
pc = -RST_VEC; // negative implies indirect
while ((opt = getopt(argc, argv, "vima:b:x:y:r:p:s:g:c:l:")) != -1) {
while ((opt = getopt(argc, argv, "vimfa:b:x:y:r:p:s:g:c:l:")) != -1) {
switch (opt) {
case 'v':
verbose = 1;
@ -97,6 +98,9 @@ int main(int argc, char *argv[])
case 'm':
mem_dump = 1;
break;
case 'f':
fast = 1;
break;
case 'b':
break_pc = hextoint(optarg);
break;
@ -147,7 +151,7 @@ int main(int argc, char *argv[])
init_uart();
reset_cpu(a, x, y, sp, sr, pc);
run_cpu(cycles, verbose, mem_dump, break_pc);
run_cpu(cycles, verbose, mem_dump, break_pc, fast);
return EXIT_SUCCESS;
}