- Opcode: 0x87
- Short name: MINUS
- Long name: Subtraction (8-bit)
Memory layout
| 0x87 | D/S | Dest | Oper | |——|——-|——–|——–|
Arguments
- const Bit[4] D: Destination bank
- const Bit[4] S: Source bank
- const UByte Dest: The destination variable, to which the operand is subtracted.
- const UByte Oper: The operand to be subtracted from the destination.
Description
Subtracts two numbers and stores the result back into “Destâ€. The result of the subtraction wraps around into the range of 0-255. If the Source Bank is 0 then the “Oper†is subtracted from the destination value. If the Source Bank is an 8 bit bank, then the “Oper†is the address in that bank where the operand is.