6.8.6 INC - B & DEC - B
Input/output Operand
Data type
IN
VB, IB, QB, MB, SB, SMB, LB, AC,constant, *VD, *LD, *AC
Byte
OUT
VB, IB, QB, MB, SB, SMB, LB, AC, *VD, *LD, *AC
Byte
INC - B: IN + 1 = OUT Both input and output are 8 bits
integers.
DEC - B: IN - 1 = OUT
Both input and output are 8 bits
integers.
The two instructions operations do not take symbols.
IN + 1 = OUT
IN - 1 = OUT
error conditions:
0006
Indirect address
SM1.1
overflow
Special memory bit:
SM1.0
Zero result
SM1.1
overflow
Example:
138
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