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Title: newbie 32-bit program, it builds but crashes when run
Post by: ggmasm32 on January 12, 2016, 08:10:55 PM

Moving up the 32-bit ladder, tried to compile 32-bit console application. I managed to build but it just crashes when run, do you see anything wrong?, appreciate in advance!

.686p

; include macros32.inc
; include exp32.inc

; experimental asm file to test out anything in this file.
; past tests can be de-activated using DISABLE_<TESTNAME> software switch in
; exp.inc

.model flat, stdcall ; windows is always 32-bit flat

option casemap:none

.STACK 100h

.DATA
msg db "Hello World!$"

.CODE

; M_EXTERNDEF

exp32 PROC
; mov ax, @DATA
; mov ds, ax

mov ah, 02h
mov dl, 31h
int 21h

mov ah, 4ch
int 21h
exp32 ENDP
END exp32

Make target:

#===32-bit programs===

LINK32FLAGS=/subsystem:CONSOLE
ASM32FLAGS=/c /coff /Fl /Zi /Zd
LINK32=link.exe
ASM32=ml

exp32: $(EXP32).exe stat

$(EXP32).exe: $(EXP32).obj
$(LINK32) $(LINK32FLAGS) $(EXP32).obj

$(EXP32).obj: $(EXP32).asm inc
$(ASM) $(ASM32FLAGS) $(EXP32).asm

Title: Re: newbie 32-bit program, it builds but crashes when run
Post by: jj2007 on January 12, 2016, 09:00:16 PM

Why don't you study \Masm32\examples\exampl01 instead of assuming (wrongly) that Windows will do you the favour to tolerate your 16-bit coding habits? This forum has a search function here (http://masm32.com/board/index.php?action=search;advanced;search=). Try int 21h to see that it works only for 16-bit code. If your computer is a recent model, you can't execute 16-bit code. Swallow that pill, you have to read the * manual.

Edit= Profanity.

Title: Re: newbie 32-bit program, it builds but crashes when run
Post by: Grincheux on January 12, 2016, 09:02:23 PM

It is not a console application but a ms-dos program.

Quote
Microsoft® MASM
Assembly-Language Development System
Version 6.1
For MS-DOS ® and Windows ™ Operating Systems

Code Select


.MODEL small, pascal
.STACK 200h

.DATA
msg BYTE "This writes to the screen$"
.CODE
.STARTUP
mov dx, offset msg ; DS:DX points to msg
mov ah, 09h ; Request Function 9
int 21h
mov ah,4c00h
int 21h
END

Title: Re: newbie 32-bit program, it builds but crashes when run
Post by: ggmasm32 on January 13, 2016, 08:04:31 PM

Quote from: Grincheux on January 12, 2016, 09:02:23 PM
It is not a console application but a ms-dos program.

Quote
Microsoft® MASM
Assembly-Language Development System
Version 6.1
For MS-DOS ® and Windows ™ Operating Systems

Code Select Expand
.MODEL small, pascal .STACK 200h .DATA msg BYTE "This writes to the screen$" .CODE .STARTUP mov dx, offset msg ; DS:DX points to msg mov ah, 09h ; Request Function 9 int 21h mov ah,4c00h int 21h END

thanks!

Title: Re: newbie 32-bit program, it builds but crashes when run
Post by: ggmasm32 on January 14, 2016, 06:12:46 PM

Quote from: jj2007 on January 12, 2016, 09:00:16 PMWhy don't you study \Masm32\examples\exampl01 instead of assuming (wrongly) that Windows will do you the favour to tolerate your 16-bit coding habits? This forum has a search function here (http://masm32.com/board/index.php?action=search;advanced;search=). Try int 21h to see that it works only for 16-bit code. If your computer is a recent model, you can't execute 16-bit code. Swallow that pill, you have to read the manual.

Hey thx for pointing out! Also take it easy too!!

Edit = Profanity in quoted text

Title: Re: newbie 32-bit program, it builds but crashes when run
Post by: Mikl__ on January 14, 2016, 06:57:06 PM

or make COM-file
bat-file

Code Select

cls
set filename=name_of_your_asm_file
ml /c /Cp %filename%.asm
link16 /t %filename%.obj,,,,,
del %filename%.obj

asm-file

Code Select

.MODEL tiny
.CODE
org 100h
start:mov dx, offset msg
mov ah,9
int 21h
mov ah,0
int 16h
ret
msg BYTE "This writes to the screen$"
end start

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General => The Campus => Topic started by: ggmasm32 on January 12, 2016, 08:10:55 PM