MUL = Multiply
| Hex | Mnemonic | Cycles |
|---|---|---|
| CE D8 | MUL L, A | 48 |
Execute
; MUL L, A
;
; L is the Factor/Multiplicand
; A is the Multiplier
; HL will be the Product
HL = L x A
Description
"8-Bits Register L" multiply by "8-Bits Register A", 16-Bits result is placed on "16-Bits Register HL".
Conditions
Zero: Set when result is 0
Carry: Always Clear
Overflow: Always Clear
Sign: Set when bit 15 of the result is 1
Examples
; A = 0x03
; L = 0x03
MUL L, A
; A = 0x03
; HL = 0x0009 (0x03 * 0x03 = 0x0009)
; F = (Zero=0):(Carry=0):(Overflow=0):(Sign=0)
; A = 0x00
; L = 0x03
MUL L, A
; A = 0x00
; HL = 0x0000 (0x03 * 0x00 = 0x0000)
; F = (Zero=1):(Carry=0):(Overflow=0):(Sign=0)
; A = 0xFF
; L = 0xFF
MUL L, A
; A = 0xFF
; HL = 0xFE01 (0xFF * 0xFF = 0xFE01)
; F = (Zero=0):(Carry=0):(Overflow=0):(Sign=1)