assemblyx86-16tasmdosbox

How to Fix: Related jump out of range by 0007h bytes


How do I fix: "Related jump out of range by 0007h bytes" in this code? Using notepad++ to execute in DOSBox

I'm just new to jump syntax, I have no idea why I made an error. This program is not finished yet, I just need to find out if the jump went wrong so that I can proceed again with another flow that I will do.

Notepad+ Code:

.model small
.stack 100h
.data                                                       ;string

        Menu    db 0dh,0ah, "   MAIN MENU   $"              ;MAIN MENU
        Cal     db 0dh,0ah,0dh,0ah, "[1]Calculator $"
        Con     db 0dh,0ah, "[2]Conversion $"
        Ex      db 0dh,0ah, "[3]Exit $"
        
        Pik     db 0dh,0ah,0dh,0ah, "Pick your choice: $"   ;Choose
        
        SubC    db 0dh,0ah, "Calculator Sub-MENU $"         ;Calculator Sub-MENU
        Ad      db 0dh,0ah,0dh,0ah,"[1]Addition $"
        Su      db 0dh,0ah, "[2]Subtraction $"
        Mu      db 0dh,0ah, "[3]Multiplication $"
        Dv      db 0dh,0ah, "[4]Division $"
        BkCM    db 0dh,0ah, "[5]Back to Main MENU $"
        
        PikA    db 0dh,0ah, "Calculator: Addition $"        ;Calculator: Addition
        PikS    db 0dh,0ah, "Calculator: Subtraction $"     ;Calculator: Subtraction
        PikM    db 0dh,0ah, "Calculator: Multiplication $"  ;Calculator: Multiplication
        PikD    db 0dh,0ah, "Calculator: Division $"        ;Calculator: Division
        
        BsT     db 0dh,0ah,0dh,0ah,"[1]Base 10 $"           ;Calculator: Base
        BsE     db 0dh,0ah,"[2]Base 11 $"
        BkS     db 0dh,0ah,"[3]Back to Sub-MENU $"          ;ack to Sub-MENU
        
        SubV    db 0dh,0ah, "Conversion Sub-MENU $"         ;Conversion Sub-MENU
        Hex     db 0dh,0ah,0dh,0ah,"[1]Base 8 to Base 16 $"
        Oct     db 0dh,0ah, "[2]Base 16 to Base 8 $"
        Deci    db 0dh,0ah, "[3]Base 8 to Base 10 $"
        BkVM    db 0dh,0ah, "[4]Back to Main MENU $"

        Spc     db 0dh,0ah, " $ "                           ;Spacing
.code
main proc
        
        mov ax,@data                    ;initialize ds
        mov ds,ax
            
        Start:                          ;show MAIN MENU
            mov ah,09h
            lea dx, Spc                 ;new Line
            int 21h
            
            lea dx, Menu                ;Main Menu
            int 21h
            lea dx, Cal
            int 21h
            lea dx, Con
            int 21h
            lea dx, Ex
            int 21h
        
            lea dx, Pik                 ;Choise
            int 21h
            mov ah,01h
            int 21h
        
            cmp al,31h                  ;cmp Logic
            je CalSub
            cmp al,32h
            je ConSub
            cmp al,33h
            jge ExitP
        
        CalSub:                         ;show Calculator Sub-MENU
            mov ah,09h
            lea dx, Spc                 ;new Line
            int 21h
            
            lea dx, SubC                ;Calculator Sub-MENU
            int 21h
            lea dx, Ad
            int 21h
            lea dx, Su
            int 21h
            lea dx, Mu
            int 21h
            lea dx, Dv
            int 21h
            lea dx, BkCM
            int 21h
            
            lea dx,Pik                  ;Choice
            int 21h
            mov ah,01h
            int 21h
            
            cmp al,31h                  ;cmp Logic
            je CalAd
            cmp al,32h
            je CalSu
            cmp al,33h
            je CalMu
            cmp al,34h
            je CalDv
            cmp al,35h
            je Start
            
        ConSub:                         ;show Conversion Sub-MENU
            mov ah,09h                  
            lea dx, Spc                 ;new Line
            int 21h
            
            lea dx, SubV                ;Conversion Sub-MENU
            int 21h
            lea dx, Hex
            int 21h
            lea dx, Oct
            int 21h
            lea dx, Deci
            int 21h
            lea dx, BkVM
            int 21h
            
            lea dx, Pik                 ;Choice
            int 21h

        ExitP:
            int 20                      ;Stop Program
        
        CalAd:                          ;show Addition
            mov ah,09               
            lea dx,Spc                  ;new Line
            int 21h
            
            lea dx,PikA                 ;Addition
            int 21h
            
            cmp al,31h                  ;Base Choices
            je Base
            
        CalSu:                          ;show Subtraction
            mov ah,09
            lea dx,Spc                  ;new Line
            int 21h
            
            lea dx,PikS                 ;Subtraction
            int 21h
            
            cmp al,32h                  ;Base Choices
            je Base
        
        CalMu:                          ;show Multiplication
            mov ah,09
            lea dx,Spc                  ;new Line
            int 21h
            
            lea dx,PikM                 ;Multiplication
            int 21h
            
            cmp al,33h                  ;Base Choices
            je Base
            
        CalDv:                          ;show Division
            mov ah,09
            lea dx,Spc                  ;new Line
            int 21h
            
            lea dx,PikD                 ;Division
            int 21h
            
            cmp al,34h                  ;Base Choices
            je Base
            
        Base:                           ;Show Base
            mov ah,09h                  ;Base
            lea dx,BsT
            int 21h
            lea dx,BsE
            int 21h
            lea dx,BkS
            int 21h
            
            lea dx,Pik                  ;Choice
            int 21h
            mov ah,01h
            int 21h
            
            cmp al,33h                  ;cmp to back in Calculator Sub-MENU
            jnz CalSub
            
        mov ah,4Ch                      ;end here
        int 21h

main endp
end main

The Error that pop in:

enter image description here


Solution

  • Range of short jump x86 instruction is limited to -128..+127. If the target is further away, it has to be encoded differently, using near jump bypassed by short conditional jump with inverted condition code. Either move the target subprocedures closer to cmp logic, or replace

            cmp al,31h                  ;cmp Logic
            je CalSub
            cmp al,32h
            je ConSub
    

    with

            cmp al,31h ; cmp Logic
            jne @@not1 ; Inverted condition.                  
            jmp CalSub ; Proxy near jump without range restriction.
    @@not1: cmp al,32h
            jne @@not2 ; Inverted condition.                  
            jmp ConSub ; Proxy near jump without range restriction.
    @@not2:
    

    Some assemblers do this replacement automatically for CPU older than 386, which do not have conditional near jump.

    An alternative solution is jump table of words with offsets of targets:

    .data
    JumpTable: DW CalSub, ConSub, ExitP
    .code            ; cmp Logic 
          sub al,31h ; Let AL=0,1,2 for CalSub, ConSub, ExitP.
          xor bx,bx
          mov bl,al  ; MOVZX BX,AL would be better, but N/A on 086.
          add bx,bx  ; Let BX=0,2,4 for CalSub, ConSub, ExitP.
          jmp [JumpTable+BX] ; Use BX as an index to JumpTable.