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flat assembler > DOS > B.S. : BlueScreen BSOD in DOS AKA AbortRetryFail INT $24

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DOS386



Joined: 08 Dec 2006
Posts: 1904
Code:
; ARFKILL.ASM - 116 Bytes FASM DOS TSR example
; B.S.: BlueScreenOfDeathEx (BSOD) in DOS AKA AbortRetryFailEx killer Very Happy
; http://board.flatassembler.net/topic.php?t=9740
; 2009-Mar-20 written: the smallest (116/48/32/0 Bytes) useful TSR ever !!!
; (CL) 2009 Public Domain - ABUSE at your own risk !!!

define pope  pop
define popef popf

format binary as "COM"
org $0100
use16

     mov   ax, $0240
     cmp   sp, ax
     jb    short no_memory
     mov   sp, ax             ; BOOM !!!
     mov   ah, $4A
     mov   bx, $28
     int   $21                ; Unhog
     jc    short no_memory
     mov   ah, $48
     mov   bx, 2
     int   $21                ; Hog it now Very Happy
     jc    short no_memory
     pushf
     cli
     cld
     dec   ax
     mov   es, ax
     inc   ax
     push  ax
     mov   si, junk_stuff
     mov   di, 1
     mov   cx, 38
     rep   movsb
     mov   ds, cx
     mov   si, $84
     movsw                    ; "off***"
     movsw                    ; "seg"
     mov   es, cx
     mov   di, $84
     mov   ax, 3
     stosw                    ; "off***"
     pope  ax
     stosw                    ; "seg"
     popef
     mov   dl, 79             ; "O"
     db    $B8      ; MOV AX, stuff
no_memory:
     mov   dl, 70             ; "F"
     mov   ah, 2
     int   $21
     mov   ah, $4C
     int   $21                ; Enjoy Very Happy
     ;--------

junk_stuff: db 8,0, 2,0, 0,0,0, "ARFSUCKS"

     mov   al, 3    ; $B0,3
     iret           ; $CF
     ;----
     pushf
     cli
     push  ax
     push  ds
     xor   ax, ax
     mov   ds, ax
     mov   [$90], ax          ; "off***"
     mov   ax, cs
     mov   [$92], ax          ; "seg"
     pope  ds
     pope  ax
     popef
     db    $EA      ; JMP FAR "seg":"off***"
     ;------------
    


This will permanently disable the annoying Abort Retry Fail "feature" of DOS (comparable to BlueScreening of Windoze) Smile

It's a TSR, and probably the smallest TSR ever (file size 116 Bytes, resident size 48/32/0 Bytes, depends how you measure).

Download now: http://board.flatassembler.net/download.php?id=4311 (4 KiB)

Image


Last edited by DOS386 on 06 May 2009, 02:55; edited 2 times in total
Post 30 Jan 2009, 07:32
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DOS386



Joined: 08 Dec 2006
Posts: 1904
It's about the criminal error handler INT $24 http://www.ctyme.com/intr/rb-4112.htm
Post 22 Mar 2009, 01:52
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GhostXoPCorp



Joined: 13 Dec 2008
Posts: 199
Location: 01F0:0100
Thats pretty cool Smile , what made you want to make this?

_________________
Oh that divide overflow. Just jumps out of the bushes every time to scare the day lights out of me.
Post 15 Jun 2009, 07:43
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DOS386



Joined: 08 Dec 2006
Posts: 1904
> Thats pretty cool

Wow, an answer after 3 moths Shocked

> what made you want to make this?

The annoying behaviour. BTW, this feature is now also present in my UI21DEB
Post 15 Jun 2009, 15:19
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TmX



Joined: 02 Mar 2006
Posts: 820
Location: Jakarta, Indonesia
DOS386, what kind of DOS you are running? FreeDOS?
I might try DOS once again...
Post 15 Jun 2009, 16:21
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GhostXoPCorp



Joined: 13 Dec 2008
Posts: 199
Location: 01F0:0100
DOS386: sorry, i just found this, it was interesting and didnt want to leave an interesting topic like this unreplied Very Happy

_________________
Oh that divide overflow. Just jumps out of the bushes every time to scare the day lights out of me.
Post 15 Jun 2009, 19:44
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DOS386



Joined: 08 Dec 2006
Posts: 1904
> what kind of DOS you are running? FreeDOS?

YES, and EDR-DOS (my own done in FASM will need some more time ...)

> I might try DOS once again...

Please do Smile
Post 16 Jun 2009, 10:52
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GhostXoPCorp



Joined: 13 Dec 2008
Posts: 199
Location: 01F0:0100
cool, your own dos? i have one but it isnt so great i dont have any drivers except for modifying the int vector, thats it. but i amaking my own interface to go with it Smile soon i wil make that interface a stand alone os. i am sensing a new thread Very Happy
Post 16 Jun 2009, 18:03
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