PM Opc MUL

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)

« Back to Instruction set