Having trouble linking...

[Cybrg641]

I am using Masm32 and am pretty new to Assembly, but I am having trouble trying to assemble and link this code:

;Io1.asm:  Displays character that is entered on the keyboard

    .model small
    .stack 100h

    .code
start:
    mov ah,1h       ;character input sub-program
    int 21h         ;call ms-dos to read character
                    ;al now contains character from keyboard
    mov dl,al       ;read character from register al
    mov ah,2h       ;character output sub-program
    int 21h         ;call ms-dos to display character

    mov ax,4c00h    ;return to ms-dos
    int 21h
    end start

I keep getting an error message that says "LINK : error lnk2001: unresolved external symbol _start"

Please help...this is driving me crazy!!!!

[Cybrg641]

Anyone? please??

[Das Mad]

Use Pass32 instead you don't have to link and compile all
U have to do is to run the asm file with pass and u get a
Exe (or what ever u want) + Win32 exe and Win32 Dll. It's simple and good.

Microsoft never wanted anybody to know their Windows in assembler, that's why they stopped making MASM.
And give out VB and C++ instead. So that they can keep their
Deepest Windows Secrets.

Pass32 http://www.geocities.com/SiliconValley/Bay/3437/ Get the pdf Manual at the same site

[parksie]

Actually, MS still distribute MASM as part of the Windows DDK (Driver Development Kit).

[Jimbob42]

For a start, rename labels "_start" and "end _start"
After that (in my version anyway) you get more problems since you can't use interrupts in win32 programs. Try using a 16 bit assembler, or type it straight into DOS's debug program.
Here is a good site for win32 assembly: http://freeshell.org/~michael/