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8085cpu-architecture

8085 program to add two 8-bit numbers in 8085 simulator

I am trying to add two 8 bit number and wrote the following code:

MVI D 08h
MVI B 03h
MVI C 00h
MOV A D
LOOP: CMP B
JC DOWN
INR A
SUB B
JNZ LOOP

DOWN: HLT

But I got incorrect output.

Solution

  • Well assuming my assumption is correct that you are storing answer in C,

    then just do a small change on 7th line:

    MVI D 08h
MVI B 03h
MVI C 00h
MOV A D
LOOP: CMP B
JC DOWN
INR C
SUB B
JNZ LOOP

DOWN: HLT

    It should work now.