Intel 8XC251SA - Page 368

8XC251SA, SB, SP, SQ USER’S MANUAL
A-116
Operation for INTR = 1:
RETI
(PC).15:8 ← ((SP))
(SP) ← (SP) – 1
PC).7:0 ← ((SP))
(SP) ← (SP) – 1
(PC).23:16 ← ((SP))
(SP) ← (SP) – 1
PSW1 ← ((SP))
(SP) ← (SP) – 1
RL A
Function: Rotate accumulator left
Description: Rotates the eight bits in the accumulator one bit to the left. Bit 7 is rotated into the bit 0
position.
Flags:
Example: The accumulator contains 0C5H (11000101B). After executing the instruction,
RL A
the accumulator contains 8BH (10001011B); the CY flag is unaffected.
Binary Mode Source Mode
Bytes: 11
States: 11
Hex Code in: Binary Mode = [Encoding]
Source Mode = [Encoding]
Operation: RL
(A).a+1 ← (A).a
(A).0 ← (A).7
RLC A
Function: Rotate accumulator left through the carry flag
Description: Rotates the eight bits in the accumulator and the CY flag one bit to the left. Bit 7 moves into
the CY flag position and the original state of the CY flag moves into bit 0 position.
Flags:
CY AC OV N Z
———✓✓
[Encoding] 0 0 1 0 0 0 1 1
CY AC OV N Z
✓ ——✓✓