Difference between revisions of "PM Opc MUL"
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(New page: == MUL = Multiply == {| border="1" style="text-align:left" !Hex !Mnemonic !Cycles |- |CE D8 |MUL L, A |48 |} === Execute === ; MUL L, A ; ; L is the Factor/Multiplicand ; A is the M...) |
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== MUL = Multiply == | == MUL = Multiply == | ||
| − | {| border="1" style="text-align:left" | + | {| border="1" style="text-align:left" class="sortable" |
!Hex | !Hex | ||
!Mnemonic | !Mnemonic | ||
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=== Description === | === Description === | ||
| − | 8-Bits Register L multiply by 8-Bits Register A, 16-Bits result is placed on 16-Bits Register HL. | + | "8-Bits Register L" multiply by "8-Bits Register A", 16-Bits result is placed on "16-Bits Register HL". |
=== Conditions === | === Conditions === | ||
| Line 33: | Line 33: | ||
Overflow: Always Clear | Overflow: Always Clear | ||
| − | Sign: Set when | + | Sign: Set when bit 15 of the result is 1 |
=== Examples === | === Examples === | ||
| Line 39: | Line 39: | ||
; A = 0x03 | ; A = 0x03 | ||
; L = 0x03 | ; L = 0x03 | ||
| − | MUL L, A | + | '''MUL L, A''' |
; A = 0x03 | ; A = 0x03 | ||
; HL = 0x0009 (0x03 * 0x03 = 0x0009) | ; HL = 0x0009 (0x03 * 0x03 = 0x0009) | ||
| − | ; F = (Zero = 0):(Carry = 0):(Overflow=0):(Sign=0) | + | ; F = (Zero=0):(Carry=0):(Overflow=0):(Sign=0) |
; A = 0x00 | ; A = 0x00 | ||
; L = 0x03 | ; L = 0x03 | ||
| − | MUL L, A | + | '''MUL L, A''' |
; A = 0x00 | ; A = 0x00 | ||
; HL = 0x0000 (0x03 * 0x00 = 0x0000) | ; HL = 0x0000 (0x03 * 0x00 = 0x0000) | ||
| − | ; F = (Zero = 1):(Carry = 0):(Overflow=0):(Sign=0) | + | ; F = (Zero=1):(Carry=0):(Overflow=0):(Sign=0) |
; A = 0xFF | ; A = 0xFF | ||
; L = 0xFF | ; L = 0xFF | ||
| − | MUL L, A | + | '''MUL L, A''' |
; A = 0xFF | ; A = 0xFF | ||
; HL = 0xFE01 (0xFF * 0xFF = 0xFE01) | ; HL = 0xFE01 (0xFF * 0xFF = 0xFE01) | ||
| − | ; F = (Zero = 0):(Carry = 0):(Overflow=0):(Sign=1) | + | ; F = (Zero=0):(Carry=0):(Overflow=0):(Sign=1) |
[[PM_InstructionList|'''« Back to Instruction set''']] | [[PM_InstructionList|'''« Back to Instruction set''']] | ||
Latest revision as of 00:24, 21 April 2009
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)
