Holtek BS83B24C Manual page 172

RLA [m] Rotate Data Memory left with result in ACC
Description The contents of the specified Data Memory are rotated left by 1 bit with bit 7 rotated into bit 0.
The rotated result is stored in the Accumulator and the contents of the Data Memory remain
unchanged.
Operation ACC.(i+1) ← [m].i; (i=0~6)
ACC.0 ← [m].7
Affected flag(s) None
Rotate Data Memory left through Carry
RLC [m]
Description The contents of the specified Data Memory and the carry flag are rotated left by 1 bit. Bit 7
replaces the Carry bit and the original carry flag is rotated into bit 0.
Operation [m].(i+1) ← [m].i; (i=0~6)
[m].0 ← C
C ← [m].7
Affected flag(s) C
RLCA [m] Rotate Data Memory left through Carry with result in ACC
Description Data in the specified Data Memory and the carry flag are rotated left by 1 bit. Bit 7 replaces the
Carry bit and the original carry flag is rotated into the bit 0. The rotated result is stored in the
Accumulator and the contents of the Data Memory remain unchanged.
Operation ACC.(i+1) ← [m].i; (i=0~6)
ACC.0 ← C
C ← [m].7
Affected flag(s) C
RR [m] Rotate Data Memory right
Description The contents of the specified Data Memory are rotated right by 1 bit with bit 0 rotated into bit 7.
Operation [m].i ← [m].(i+1); (i=0~6)
[m].7 ← [m].0
Affected flag(s) None
RRA [m] Rotate Data Memory right with result in ACC
Description Data in the specified Data Memory is rotated right by 1 bit with bit 0 rotated into bit 7.
The rotated result is stored in the Accumulator and the contents of the Data Memory remain
unchanged.
Operation ACC.i ← [m].(i+1); (i=0~6)
ACC.7 ← [m].0
Affected flag(s) None
RRC [m] Rotate Data Memory right through Carry
Description The contents of the specified Data Memory and the carry flag are rotated right by 1 bit. Bit 0
replaces the Carry bit and the original carry flag is rotated into bit 7.
Operation [m].i ← [m].(i+1); (i=0~6)
[m].7 ← C
C ← [m].0
Affected flag(s) C
Rev. 1.00
BS83B24C/BS83C40C
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