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llow single step and quit options during executions of 6502 simulation

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This commit is contained in:
David Schmenk 2024-03-16 11:26:22 -07:00
parent 31d5b8a5ec
commit 3fd11ca0d4
2 changed files with 23 additions and 9 deletions
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30
src/lib6502/a1cffa.c
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@ -153,12 +153,18 @@ int cffa1(M6502 *mpu, word address, byte data)
int bye(M6502 *mpu, word addr, byte data) { exit(0); return 0; }
int cout(M6502 *mpu, word addr, byte data) { if (mpu->registers->a == 0x8D) putchar('\n'); putchar(mpu->registers->a & 0x7F); fflush(stdout); rts; }
unsigned keypending = 0;
unsigned char keypressed(void)
int paused = 0;
unsigned char keypending = 0;
unsigned char keypressed(M6502 *mpu)
{
unsigned char cin, cext[2];
if (read(STDIN_FILENO, &cin, 1) > 0)
{
if (cin == 0x03) // CTRL-C
{
mpu->flags |= M6502_SingleStep;
paused = 1;
}
if (cin == 0x1B) // Look for left arrow
{
if (read(STDIN_FILENO, cext, 2) == 2 && cext[0] == '[' && cext[1] == 'D')
@ -168,19 +174,19 @@ unsigned char keypressed(void)
}
return keypending & 0x80;
}
unsigned char keyin(void)
unsigned char keyin(M6502 *mpu)
{
unsigned char cin;
if (!keypending)
keypressed();
keypressed(mpu);
cin = keypending;
keypending = 0;
return cin;
}
int rd6820kbdctl(M6502 *mpu, word addr, byte data) { return keypressed(); }
int rd6820kbdctl(M6502 *mpu, word addr, byte data) { return keypressed(mpu); }
int rd6820vidctl(M6502 *mpu, word addr, byte data) { return 0x00; }
int rd6820kbd(M6502 *mpu, word addr, byte data) { return keyin(); }
int rd6820kbd(M6502 *mpu, word addr, byte data) { return keyin(mpu); }
int rd6820vid(M6502 *mpu, word addr, byte data) { return 0x80; }
int wr6820vid(M6502 *mpu, word addr, byte data) { if (data == 0x8D) putchar('\n'); putchar(data & 0x7F); fflush(stdout); return 0; }
@ -244,7 +250,17 @@ int main(int argc, char **argv)
char insn[64];
M6502_dump(mpu, state);
M6502_disassemble(mpu, mpu->registers->pc, insn);
printf("%s : %s\n", state, insn);
printf("%s : %s\r\n", state, insn);
if (paused || (keypressed(mpu) && keypending == 0x83))
{
keypending = 0;
while (!keypressed(mpu));
if (keypending == (0x80|'C'))
paused = 0;
else if (keypending == (0x80|'Q'))
break;
keypending = 0;
}
}
M6502_delete(mpu);
return 0;

2
src/samplesrc/test.pla
View File

@ -71,8 +71,6 @@ def nums(range)#0
array[1]++
array[0] = array[0] + 1
array++
a1[0]++
a1++
puti(array[0]);putln
puti(array[1]);putln
end