ROLC = Rotate Left through Carry
| Hex | Mnemonic | Cycles |
|---|---|---|
| CE 90 | ROLC A | 12 |
| CE 91 | ROLC B | 12 |
| CE 92 nn | 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)