Holtek HT827A0 Manual page 40

RLA [m] Rotate data memory to the left - then place result in the accumulator
Description Data in the specified data memory are rotated 1-bit to the left with bit 7 ro-
tated into bit 0, leaving the rotation result in the accumulator. The contents
of the data memory remain unchanged.
Operation
ACC.(i+1) ¬ [m].i; [m].i:bit i of the data memory (i=0~6)
ACC.0 ¬ [m].7
Affected flag(s)
TC2
¾
RLC [m] Rotate data memory left through carry
Description The contents of the specified data memory and carry flag are rotated 1-bit to
the left. Bit 7 replaces the carry bit; the original carry flag is rotated to the bit
0 position.
Operation
[m].(i+1) ¬ [m].i; [m].i:bit i of the data memory (i=0~6)
[m].0 ¬ C
C ¬ [m].7
Affected flag(s)
TC2
¾
RLCA [m]
Rotate left through carry - then place result in the accumulator
Description Data in the specified data memory and carry flag are rotated 1-bit left. Bit 7
replaces the carry bit and the original carry flag is rotated to the bit 0 posi-
tion. The rotation result is stored in the accumulator but the contents of the
data memory remain unchanged.
Operation
ACC.(i+1) ¬ [m].i; [m].i:bit i of the data memory (i=0~6)
ACC.0 ¬ C
C ¬ [m].7
Affected flag(s)
TC2
¾
TC1 TO PD OV
¾ ¾ ¾ ¾
TC1 TO PD OV
¾ ¾ ¾ ¾
TC1 TO PD OV
¾ ¾ ¾ ¾
40
HT827A0
Z AC C
¾ ¾ ¾
Z AC C
¾ ¾ Ö
Z AC C
¾ ¾ Ö
March 15, 2000