User's Manual

MSM80C154S/83C154S/85C154HVS
296
43. JBC bit address, code address (Jump and clear if bit is set)
00010000
70
Instruction code
Bit address
Relative offset
Operations
Number of bytes
Number of cycles
Flags
(PSW)
Description
: Byte 1
R7 R6 R5 R4 R3 R2 R1 R0
70
Byte 3
(PC)←(PC)+3
IF (bit address)=1
THEN
(bit address)←0
(PC)←(PC)+relative offset
:
C AC F0 RS1 RS0 OV F1 P
:
:
:
Control is shifted to a relative jump address if the specified bit
address content is 1, and that bit is cleared to 0.
Control is shifted to the next address following this instruction if
the content is 0.
:
3
2
b7 b6 b5 b4 b3 b2 b1 b0
70
Byte 2