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Simplify 6502 ADC a little

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This commit is contained in:
Adrian Conlon 2024-06-29 10:52:09 +01:00
parent 060481e4df
commit 7f0ca27412
1 changed files with 5 additions and 8 deletions
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13
M6502/M6502.cs
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@ -1047,13 +1047,10 @@ namespace EightBit
private void ADC()
{
if (this.Decimal != 0)
this.ADC_d();
else
this.ADC_b();
this.A = this.Decimal != 0 ? this.ADC_d() : this.ADC_b();
}
private void ADC_b()
private byte ADC_b()
{
var operand = A;
var data = Bus.Data;
@ -1064,10 +1061,10 @@ namespace EightBit
this.AdjustNZ(intermediate.Low);
this.A = intermediate.Low;
return intermediate.Low;
}
private void ADC_d()
private byte ADC_d()
{
var operand = this.A;
var data = this.Bus.Data;
@ -1091,7 +1088,7 @@ namespace EightBit
this.SetFlag(StatusBits.CF, this.intermediate.High);
this.A = (byte)(LowerNibble(LowByte(low)) | HigherNibble(this.intermediate.Low));
return (byte)(LowerNibble(LowByte(low)) | HigherNibble(this.intermediate.Low));
}
#endregion