6502/rk65c02
1
0
Fork 0
mirror of https://github.com/rkujawa/rk65c02.git synced 2024-12-11 18:49:16 +00:00
Code Issues Projects Releases Wiki Activity

Fix carry flag setting in comparison instructions. Resolve #2.

Browse Source
This commit is contained in:
Radosław Kujawa 2017-02-15 21:58:42 +01:00
parent de1ab25427
commit cc61646ba9
1 changed files with 6 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
src/emulation.c
View File

@ -397,9 +397,9 @@ emul_cmp(rk65c02emu_t *e, void *id, instruction_t *i)
instruction_status_adjust_negative(e, sr);
if (e->regs.A < val)
e->regs.P |= P_CARRY;
else
e->regs.P &= ~P_CARRY;
else
e->regs.P |= P_CARRY;
}
/* CPX - compare X and memory location */
@ -415,9 +415,9 @@ emul_cpx(rk65c02emu_t *e, void *id, instruction_t *i)
instruction_status_adjust_negative(e, sr);
if (e->regs.X < val)
e->regs.P |= P_CARRY;
else
e->regs.P &= ~P_CARRY;
else
e->regs.P |= P_CARRY;
}
/* CPY - compare Y and memory location */
@ -433,9 +433,9 @@ emul_cpy(rk65c02emu_t *e, void *id, instruction_t *i)
instruction_status_adjust_negative(e, sr);
if (e->regs.Y < val)
e->regs.P |= P_CARRY;
else
e->regs.P &= ~P_CARRY;
else
e->regs.P |= P_CARRY;
}
/* DEC - decrement memory location/acumulator */