6502
/
6502-emu
mirror of https://github.com/DavidBuchanan314/6502-emu.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

Added break command to stop at address and save memory dump

This commit is contained in:
Rob McMullen 2017-12-19 14:55:24 -08:00
parent 138531960f
commit 649b7f8349
1 changed files with 14 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
6502-emu.c
View File

@ -19,7 +19,7 @@ void step_delay()
nanosleep(&req, &rem);
}
void run_cpu(long cycle_stop, int verbose, int mem_dump)
void run_cpu(long cycle_stop, int verbose, int mem_dump, int break_pc)
{
long cycles = 0;
int cycles_per_step = (CPU_FREQ / (ONE_SECOND / STEP_DURATION));
@ -30,6 +30,12 @@ void run_cpu(long cycle_stop, int verbose, int mem_dump)
cycles += step_cpu(verbose);
if ((cycle_stop > 0) && (total_cycles >= cycle_stop)) goto end;
step_uart();
if (break_pc >= 0 && PC == (uint16_t)break_pc) {
fprintf(stderr, "break at %04x\n", break_pc);
save_memory(NULL);
goto end;
}
}
step_delay(); // remove this for more speed
}
@ -64,7 +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;
int verbose, interactive, mem_dump, break_pc;
long cycles;
int opt;
@ -73,13 +79,14 @@ int main(int argc, char *argv[])
mem_dump = 0;
cycles = 0;
load_addr = 0xC000;
break_pc = -1;
a = 0;
x = 0;
y = 0;
sp = 0;
sr = 0;
pc = -RST_VEC; // negative implies indirect
while ((opt = getopt(argc, argv, "vima:x:y:r:p:s:g:c:l:")) != -1) {
while ((opt = getopt(argc, argv, "vima:b:x:y:r:p:s:g:c:l:")) != -1) {
switch (opt) {
case 'v':
verbose = 1;
@ -90,6 +97,9 @@ int main(int argc, char *argv[])
case 'm':
mem_dump = 1;
break;
case 'b':
break_pc = hextoint(optarg);
break;
case 'a':
a = hextoint(optarg);
break;
@ -137,7 +147,7 @@ int main(int argc, char *argv[])
init_uart();
reset_cpu(a, x, y, sp, sr, pc);
run_cpu(cycles, verbose, mem_dump);
run_cpu(cycles, verbose, mem_dump, break_pc);
return EXIT_SUCCESS;
}