Rainbow Electronics HT49R70A-1 - Manual (Page 35)

RLC [m] Rotate data memory left through carry
Description The contents of the specified data memory and the carry flag are rotated 1 bit left. Bit 7 re-
places the carry bit; the original carry flag is rotated into 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 TC1 TO PD OV Z AC C
¾ ¾ ¾ ¾ ¾ ¾ ¾ Ö
RLCA [m] Rotate left through carry and place result in the accumulator
Description Data in the specified data memory and the carry flag are rotated 1 bit left. Bit 7 replaces the
carry bit and the original carry flag is rotated into bit 0 position. The rotated 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 TC1 TO PD OV Z AC C
¾ ¾ ¾ ¾ ¾ ¾ ¾ Ö
RR [m] Rotate data memory right
Description The contents of the specified data memory are rotated 1 bit right with bit 0 rotated to bit 7.
Operation [m].i ¬ [m].(i+1); [m].i:bit i of the data memory (i=0~6)
[m].7 ¬ [m].0
Affected flag(s)
TC2 TC1 TO PD OV Z AC C
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
RRA [m] Rotate right and place result in the accumulator
Description Data in the specified data memory is rotated 1 bit right with bit 0 rotated into bit 7, leaving
the rotated result in the accumulator. The contents of the data memory remain unchanged.
Operation ACC.(i) ¬ [m].(i+1); [m].i:bit i of the data memory (i=0~6)
ACC.7 ¬ [m].0
Affected flag(s)
TC2 TC1 TO PD OV Z AC C
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
RRC [m] Rotate data memory right through carry
Description The contents of the specified data memory and the carry flag are together rotated 1 bit
right. Bit 0 replaces the carry bit; the original carry flag is rotated into the bit 7 position.
Operation [m].i ¬ [m].(i+1); [m].i:bit i of the data memory (i=0~6)
[m].7 ¬ C
C ¬ [m].0
Affected flag(s)
TC2 TC1 TO PD OV Z AC C
¾ ¾ ¾ ¾ ¾ ¾ ¾ Ö
HT49R70A-1
Rev. 1.00 35 December 4, 2001