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fixed BCD?

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This commit is contained in:
Michael Specht 2018-02-07 10:20:09 +01:00
parent 011472fe3c
commit f61368fe2e
1 changed files with 2 additions and 8 deletions
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10
champ.c
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@ -197,12 +197,6 @@ uint8_t pop()
void set_flag(int which, int value) void set_flag(int which, int value)
{ {
// TODO: Implement decimal mode (BCD)
// if ((which == DECIMAL_MODE) && value)
// {
// printf("Decimal flag not implemented yet!");
// exit(1);
// }
cpu.flags &= ~which; cpu.flags &= ~which;
if (value) if (value)
cpu.flags |= which; cpu.flags |= which;
@ -258,7 +252,7 @@ void adc(uint8_t value)
{ {
set_flag(CARRY, 0); set_flag(CARRY, 0);
if ((cpu.a & 0xf) > 0x9) if ((cpu.a & 0xf) > 0x9)
cpu.a += 0x60; cpu.a += 0x06;
if ((cpu.a & 0xf0) > 0x90) if ((cpu.a & 0xf0) > 0x90)
{ {
cpu.a += 0x60; cpu.a += 0x60;
@ -279,7 +273,7 @@ void sbc(uint8_t value)
set_flag(CARRY, 0); set_flag(CARRY, 0);
cpu.a -= 0x66; cpu.a -= 0x66;
if ((cpu.a & 0xf) > 0x9) if ((cpu.a & 0xf) > 0x9)
cpu.a += 0x60; cpu.a += 0x06;
if ((cpu.a & 0xf0) > 0x90) if ((cpu.a & 0xf0) > 0x90)
{ {
cpu.a += 0x60; cpu.a += 0x60;