eZ80
®
CPU
User Manual
UM007714-0908 CPU Instruction Set
305
RL r
Rotate Left
Operation
Description
The
r
operand is any of the 8-bit CPU registers A, B, C, D, E, H, or L. The CPU manipu-
lates the contents of the
r
operand by rotating them left one bit position. The CPU next
copies bit 7 into the Carry Flag and copies the previous contents of the Carry Flag into bit
0 of the
r
operand.
Condition Bits Affected
Attributes
jj identifies the A, B, C, D, E, H, or L register and is assembled into one of the opcodes
indicated in Table 88.
S Set if result is negative; reset otherwise.
Z Set if result is 0; reset otherwise.
H Reset.
P/V Set if parity is even; reset otherwise.
N Reset.
C Data from bit 7 of the source.
Mnemonic Operand ADL Mode Cycle Opcode (hex)
RL r X2CB, jj
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