title: Invalid combination of opcode and operands
body: <pre><code>SEGMENT .data
      print       db      "%d %d %d %d This is a test of printf", 10, 0
      rowm        dw      160     ;row multiplier
      iterations  db      80      ;number of columns to set
  
  SEGMENT .bss
      offs        resd    1       ;offset 
  
  SEGMENT .text
      attribute   equ     47h ;color attribute
  
      global _VText
      global _VPage
      extern _vm_buffer
      extern _printf
  
  
  _VText:
  
      push ebp
      mov ebp, esp
      push edi
      push esi
      push eax
      push es
      push ecx
      push edx
  
      mov esi, [ebp+8]        ;message 
      mov es, [_vm_buffer]
      mov dword [offs], 0
  
      mov ax, [ebp+12]            ;row
      mul dword[rowm]         ;multiply row by 160, result stored in dx:ax
      add [offs], dx          ;add dx:ax to offset
      shl dword [offs], 16
      add [offs], ax
  
      mov ax, [ebp+16]            ;column
      shl ax, 1               ;multiply column by 2
      add [offs], ax          ;add ax to offset
  
      mov ax, [ebp+24]            ;page
      shl ax, 12              ;multiply page by 2^12 (4096)
      add [offs], ax          ;add ax to offset   
  
      mov edi, offs           ;set offset
      mov ah, [ebp+20]        ;attribute
  
      sub byte[iterations], [ebp+16]   ;so that we don't write too many columns
      mov ecx, iterations
  
  next_char:
      lodsb                   ;get the input string type
      cmp al, 00h             ;check for null character
      je null_ch              ;if null, then quit (null character indicates end of the string)
      stosw                   ;store ax to video memory
      loop next_char          ;will loop 80 times
  
  null_ch:
      pop edx
      pop ecx
      pop es
      pop eax
      pop esi
      pop edi
      pop ebp
      ret
  
  
  _VPage:
  
  
  
      ret
  </code></pre>
  
  <p>i researched this error earlier and it said add the bracket i did that and it's not fixing.</p>
  
  <p>help please.</p>