Bitr Bit Reset - Samsung S3C84I8 User Manual

INSTRUCTION SET
BITR
— Bit Reset
dst.b
BITR
dst(b) ← 0
Operation:
The BITR instruction clears the specified bit within the destination without affecting any other bit in
the destination.
No flags are affected.
Flags:
Format:
opc
NOTE: In the second byte of the instruction format, the destination address is four bits, the bit
Given: R1 = 07H:
Example:
BITR
If the value of the working register R1 is 07H (00000111B), the statement "BITR R1.1" clears bit
one of the destination register R1, leaving the value 05H (00000101B).
6-20
dst | b | 0
address "0" is three bits, and the LSB address value is one bit in length.
→
R1.1
Bytes Cycles
2
R1 = 05H
S3C84I8/F84I8/C84I9/F84I9
Opcode Addr Mode
(Hex)
4 77
dst
rb