Category : Printer Utilities
Archive   : DOSGRAPH.ZIP

Output of file : GRAPHICS.TXT contained in archive : DOSGRAPH.ZIP
SUMMARY: A way to use DOS 4.01's GRAPHICS.COM is DOS 3.3 machines
to obtain EGA & VGA screen dumps.
22 Jan 1991

Versions of MS-DOS before 4.xx do not support EGA & VGA Screen dumps
with DOS's

Versions of in MS-DOS 4.01 do, but cannot be run on a machine
with MS-DOS 3.xx, as they detect the DOS version and will not load into
those machines.

HOWEVER: If the DOS version detection is "PATCHED OUT", it would seem
that a DOS 4.01 will run correctly in a DOS 3.3 machine.

Other Machines (Dos versions) may also work with the modified GRAPHICS.COM,
but I have only tried MS-DOS 3.30


Here is a way to patch GRAPHICS.COM:

Assuming GRAPHICS.COM MS-DOS Ver 4.01 date 10-6-88 length 16,693

{using DEBUG}


E1764 ; Edit offset 1764

{ensure that 1764=04 & 1765=00} ; (check that it's the right version !!!)
{then edit 1766=75 to 90 (NOP)} ; ( THE PATCH : NOP out the jump if not)
{ edit 1767=03 to 90 (NOP)} ; ( DOS 4.0x )

W ; write the file back
Q ; quit DEBUG

Note: If you don't understand this... don't attempt it !!!!

Ensure that GRAPHICS.PRO is also present with GRAPHICS.COM


This works for me, and the GRAPHIC DUMPS are a lot faster than many of the
Public Domain & Shareware programs currently around.

BTW: I would point out that I bought DOS 4.01 to upgrade from 3.30, but
found that I needed to stay with 3.30 for other software reasons.
Seeing that 4.01's GRAPHICS.COM supported EGA & VGA led to this
course of action.

It works for me ...... I hope it works as well for you.

Dos 4.01 is MUCH more powerful than previous versions, supporting
most printers with a user configurable GRAPHICS.PRO (profile) data file.

In order to make full use of its options & power, you need the DOCUMENTATION !!

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  3 Responses to “Category : Printer Utilities
Archive   : DOSGRAPH.ZIP

  1. Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!

  2. This is so awesome! 😀 I’d be cool if you could download an entire archive of this at once, though.

  3. But one thing that puzzles me is the “mtswslnkmcjklsdlsbdmMICROSOFT” string. There is an article about it here. It is definitely worth a read: