DCR
Syntax: DCR R
Where R can be any of the general purpose registers (A,B,C,D,E,H andL)
Byte: 1byte
Addressing Mode: Register Addressing
Working:
1.
2.
3.
4. Flag
Example: DCR B
Where [B]= 10H
After execution of DCR B
[B]= 0F H
IN
Syntax: IN 8-bit Where 8-bit is an output port address. Byte: 2byte Addressing Mode: Direct Addressing Working: 1. 2. Example: IN 35H Where [35H]= 20 H After execution of above [A] = 20H
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