replace PROC
    enter 8, 0
    min_i equ [bp - 2]
    min equ [bp - 4]
    max_i equ [bp - 6]
    max equ [bp - 8]

    mov bx,offset ptr_arr

    mov [min_i],[bx]
    mov [max_i],[bx]

    ...

    leave
    ret
replace ENDP

The program works with matrices and ptr_arr stores the offsets of the first row.
In bx there is an offset that I want to move to min_i and max_i, but the program does not compile. Compiler writes error a2023 instruction operand must have size.
I tried using mov [min_i],WORD ptr bx, but in debug is looks like mov [bp - 2],bx without dereference for bxwhich I need.
Is it possible to do this in 1 line without transferring bx to the buffer and reading from there.
I'm using masm for ms-dos. Compiling with masm link in dosbox.

CodePudding user response：

In asm isn't possible to copy from memory to memory(from pointer to pointer) in one instruction. More info here x86 Assembly pointers