I need help with a Assembly code. I know this is a C++ forum, but if anyone can help me I would very much appreciate it.

[Dave Jones]

I complied this code, but there is an error message indicating there is a problem with the code. Please anybody help me fix it.

SAMPLE program for arithmetic operation:

ORG 0100H
MOV AL,X ; Move X into AL
MOV BL,02H ; Move 2 into BL
MUL BL ; Multiply AL by BL, the result will be in AX
MOV CX,AX ; Store the answer in CX

MOV AL,Y ; Move Y into AL
MOV BA,05H ; Move 5 into BL
MUL BL ; Multiply AL by BL, the result will be in AX


ADD AX,CX ; ADD first arithmetic result to second one

MOV CL,W ; Move the dividend (W) into CL
DIV CL ; Divide CL into AX, the result will be in AH,AL

RET

X DB 04H
Y DB 03H
W DB 02H

[Cubbi]

I complied this code, but there is an error message

How exactly did you compile it, and what exactly is the error message.

Note that this program is written for 16-bit x86 platform and expects to be executed by MS-DOS operating system (or compatible), it may take some work to find an assembler and an emulator to run this today.

[Dave Jones]

Well the complier indicates a problem in the seventh line form the code, which is MOV BA,05H. It states that is probably not defined and a wrong parameter in the code. And I found a program online that runs it.

Do you think you can help me fix the problem?

[Chervil]

The comment says BL but the code says BA ?

[BluesMatt]

Did changing this:

MOV BA,05H ; Move 5 into BL

To this:

MOV BL, 05H ; Move 5 into BL

fix it?

[vlad from moscow]

If I remember you can use command LA instead of MOV. For example

MOV AL,X ; Move X into AL
LA BX,02H ; Move 2 into BL
MUL BL ; Multiply AL by BL, the result will be in AX
MOV CX,AX ; Store the answer in CX

MOV AL,Y ; Move Y into AL
LA BX,05H ; Move 5 into BL
MUL BL ; Multiply AL by BL, the result will be in AX


Also I would advice to use old Borland's TASM 4.01 or TASM 5.0 and write programs in the IDEAL mode.

[Dave Jones]

Hey thanks guys, Sorry for the late reply. Anyways, a thanks to Chervil and BluesMatt for stating that mistake from the source code. The code was able to compile after fixing that careless mistake.