Difference between revisions of "PM Opc ROLC"
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| − | == ROLC = Rotate Left | + | == ROLC = Rotate Left through Carry == |
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=== Description === | === Description === | ||
| − | "8-Bits Destination" bits are rotated left by 1 | + | "8-Bits Destination" bits are rotated left by 1 through Carry. |
=== Conditions === | === Conditions === | ||
Revision as of 15:22, 20 April 2009
ROLC = Rotate Left through Carry
| Hex | Mnemonic | Cycles |
|---|---|---|
| CE 90 | ROLC A | 12 |
| CE 91 | ROLC B | 12 |
| CE 92 | ROLC [N+#nn] | 20 |
| CE 93 | ROLC [HL] | 16 |
Execute
A = Register A B = Register B [N+#nn] = Memory: (I shl 16) or (N shl 8) or #nn [HL] = Memory: (I shl 16) or HL
; ROLC Ds ; ; Ds = Source/Destination Ds = (Ds SHL 1) OR Carry
Description
"8-Bits Destination" bits are rotated left by 1 through Carry.
Conditions
Zero: Set when result is 0
Carry: Set when old bit 7 is 1
Sign: Set when bit 7 of the result is 1
Overflow remain unchanged
Examples
; A = 0x04 ; F = (Carry=0) ROLC A ; A = 0x08 ; F = (Zero=0):(Carry=0):(Sign=0)
; B = 0x45 ; F = (Carry=1) ROLC B ; B = 0x8B ; F = (Zero=0):(Carry=0):(Sign=1)
; B = 0x84 ; F = (Carry=0) ROLC B ; B = 0x08 ; F = (Zero=0):(Carry=1):(Sign=0)
; [HL] = 0x80 ; F = (Carry=0) ROLC [HL] ; [HL] = 0x00 ; F = (Zero=1):(Carry=1):(Sign=0)
; [HL] = 0x80 ; F = (Carry=1) ROLC [HL] ; [HL] = 0x01 ; F = (Zero=0):(Carry=1):(Sign=0)
