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This commit is contained in:
Michael Specht 2023-01-10 13:58:42 +01:00
parent 7f0529db03
commit e1ab78a4e7
2 changed files with 8 additions and 4 deletions
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6
examples/example01.s
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@ -1,13 +1,13 @@
DSK test
MX %11
ORG $6000
FOO EQU $8000
JSR TEST
BRK
TEST LDA #64 ; load 64 into accumulator
ASL ; multiply by two @Au
ASL ; multiply by two @Au
STA FOO ; store result @Au
RTS

6
p65c02.c
View File

@ -33,6 +33,8 @@ uint16_t start_pc = 0x6000;
uint16_t start_frame_pc = 0xffff;
uint16_t old_pc = 0;
uint8_t brk_encountered = 0;
uint16_t yoffset[192] = {
0x0000, 0x0400, 0x0800, 0x0c00, 0x1000, 0x1400, 0x1800, 0x1c00,
0x0080, 0x0480, 0x0880, 0x0c80, 0x1080, 0x1480, 0x1880, 0x1c80,
@ -704,7 +706,7 @@ void handle_next_opcode()
branch(1, relative_offset, &cycles);
break;
case BRK:
unhandled_opcode = 1;
brk_encountered = 1;
break;
case BVC:
branch(!test_flag(OVERFLOW), relative_offset, &cycles);
@ -1181,7 +1183,9 @@ int main(int argc, char** argv)
uint32_t next_display_refresh = 0;
uint8_t old_screen_number = 0;
int last_cycles = -1;
brk_encountered = 0;
while (1) {
if (brk_encountered) break;
handle_watch(cpu.pc, 0);
uint16_t old_pc = cpu.pc;
handle_next_opcode();