public static int GetParamBytes(addressing addrMode)
{
switch (addrMode)
{
case addressing.implied:
// No operand
return(0);
case addressing.relative:
// Operand is a signed byte
return(1);
case addressing.immediate:
// Operand is a byte literal
return(1);
case addressing.zeropage:
case addressing.zeropageIndexedX:
case addressing.zeropageIndexedY:
case addressing.indirectX:
case addressing.indirectY:
// All operate on zero-page
return(1);
case addressing.absolute:
case addressing.indirect:
case addressing.absoluteIndexedX:
case addressing.absoluteIndexedY:
// All use 16-bit address
return(2);
default:
throw new ArgumentException("Invalid addressing mode specified.");
}
}
public op(byte index, string name, addressing addressing, int cycleCount, bool valid, bool mystery)
{
this.index = index;
this.name = name;
this.addressing = addressing;
this.cycleCount = (byte)cycleCount;
this.valid = valid;
this.mystery = mystery;
}
