Patch GRAPHICS.COM (DOS 4.0) to run under DOS 3.3 ?

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4 total messages Started by Eric A. Raymond Tue, 14 Nov 1989 07:49

#245

Author: Eric A. Raymond
Date: Tue, 14 Nov 1989 07:49

16 lines
990 bytes

For obscure reasons, I need to run GRAPHICS.COM under DOS 3.3 (to get
VGA screen dumps).  Unfortunately it gives me the message:
 
    Incorrect DOS Version

when I run it under DOS 3.3. I just tried tracing through the binary,
made one obvious change, one less obvious change, but it still would't
work.

Any patches out there?



-- 
Eric A. Raymond  (raymond@ptolemy.arc.nasa.gov)
G7 C7 G7 G#7 G7 G+13 C7 GM7 Am7 Bm7 Bd7 Am7 C7 Do13 G7 C7 G7 D+13: Elmore James

EGA screen dump (Was: Patch GRAPHICS.COM ...)

#246

Author: Jeff Boone
Date: Tue, 14 Nov 1989 21:08

22 lines
1665 bytes

>For obscure reasons, I need to run GRAPHICS.COM under DOS 3.3 (to get

In a related vein, I need a program (preferably a function callable from
Microsoft C 5.1, but an assembly routine or even a TSR would work) to
perform a screen dump from an EGA system to an Epson dot-matrix printer.
We're running MS-DOS 3.2 and (if it matters) Phoenix 386 BIOS version 2.00.

DOS upgrades won't work for us because we're writing a package for our
customers that needs to run under any 3.x or later version of DOS.

Thanks in advance.

-------------------------------------------------------------------------------
Jeff Boone				Microwave & RF Instruments Division
jeffb@tekfdi.FDI.TEK.COM		Tektronix, Inc.   Beaverton, Oregon
-------------------------------------------------------------------------------
-- 
-------------------------------------------------------------------------------
Jeff Boone				Microwave & RF Instruments Division
jeffb@tekfdi.FDI.TEK.COM		Tektronix, Inc.   Beaverton, Oregon
-------------------------------------------------------------------------------

Re: Patch GRAPHICS.COM (DOS 4.0) to run under DOS 3.3 ?

#247

Author: Michael Schuster
Date: Wed, 15 Nov 1989 23:14

29 lines
1453 bytes

In article <2961@einstein.ptolemy.arc.nasa.gov> raymond@ptolemy.arc.nasa.gov (Eric A. Raymond) writes:
>For obscure reasons, I need to run GRAPHICS.COM under DOS 3.3 (to get
>VGA screen dumps).  Unfortunately it gives me the message:
> 
>    Incorrect DOS Version
>
>when I run it under DOS 3.3. I just tried tracing through the binary,
>made one obvious change, one less obvious change, but it still would't
>work.
>
>Any patches out there?


The version-check code in most of the DOS 4 external programs looks
like this:

B4 30		MOV AH,30
CD 91   	INT 21
3D 04 00	CMP AX,4
75 03		JNZ 176B

If you replace the last line of code (75 03) with NOP's the version test
will be ignored.


-- 
l\  /l'   _  Mike Schuster          ...!dasys1!schuster
l \/ lll/(_  Big Electric Cat       schuster@dasys1.UUCP   CIS:70346,1745
l    lll\(_  New York, NY USA       BIX,DELPHI,GEnie:MSCHUSTER

Re: Patch GRAPHICS.COM (DOS 4.0) to run under DOS 3.3 ?

#257

Author: Rick Hung
Date: Sat, 18 Nov 1989 05:57

7 lines
712 bytes

Does anyone out there have a program that will convert binary numbers to
decimal numbers?  I need one that will work in DOS.
If you have it, please send it.
Thanks.

Rick Hung

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