MASM611 problem

[cqzhy1986]

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.model tiny

.data
L1 db 30h
L2 db 40h

.code
start:
    org 100h
    mov ax, [L1]
    mov bx, [L2]
    add ax, bx
end start


MASM611 error message is:

Assembling: test.asm
test.asm(10): error A2070: invalid instruction operands
test.asm(11): error A2070: invalid instruction operands

someone tell me what's wrong with my code?  :'(

[Neil]

You have defined your data as byte and are trying to move it into 16 bit registers, you should use al & bl, also the brackets are not needed.

[cqzhy1986]

You have defined your data as byte and are trying to move it into 16 bit registers, you should use al & bl, also the brackets are not needed.

I thought if the brackets are missed, the address will be loaded into registers.

I am a newbie and I will try your advice, thank you

[FORTRANS]

You have defined your data as byte and are trying to move it into 16 bit registers, you should use al & bl, also the brackets are not needed.

I thought if the brackets are missed, the address will be loaded into registers.

I am a newbie and I will try your advice, thank you

Hi,

   A diifferent assembler uses that action (NASM).  MASM uses
the OFFSET operator to load an address.

Code Select Expand


        MOV     BX,L1   ; loads the contents of L1
        MOV     BX,[L1] ; loads the contents of L1
        MOV     BX,OFFSET L1       ; loads the address offset of L1


Steve N.

[cqzhy1986]

Oh...... different rules for different tools...... it is easy to make newbie confused.....

Hi,

   A diifferent assembler uses that action (NASM).  MASM uses
the OFFSET operator to load an address.

Code Select Expand


        MOV     BX,L1   ; loads the contents of L1
        MOV     BX,[L1] ; loads the contents of L1
        MOV     BX,OFFSET L1       ; loads the address offset of L1


Steve N.