Detecting display type (in assembler)

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3 total messages Started by NEASE Sun, 12 Aug 1990 19:03

#542

Author: NEASE
Date: Sun, 12 Aug 1990 19:03

11 lines
859 bytes

I'm looking for a clean, safe way to determine what kind of display is being
used on a PC or PS/2 type machine.  ie: I want to know if there is either no
display adapter, or monochrome, or cga, ega, vga colour, vga paperwhite, mcga,
pga.  I don't care which brand of card it is... I'm not worrying about whether
the Vga chip set is Tseng or CHIPS, or ...    I'm trying to do this in
assembler.  Any ideas out there?
 
thanks in advance
 
 
     Reid M. Pinchback

Re: Detecting display type (in assembler)

#544

Author: Frotz
Date: Mon, 13 Aug 1990 17:39

15 lines
1157 bytes

NEASE@MAINE.BITNET writes:

]I'm looking for a clean, safe way to determine what kind of display is being
]used on a PC or PS/2 type machine.  ie: I want to know if there is either no
]display adapter, or monochrome, or cga, ega, vga colour, vga paperwhite, mcga,
]pga.  I don't care which brand of card it is... I'm not worrying about whether
]the Vga chip set is Tseng or CHIPS, or ...    I'm trying to do this in
]assembler.  Any ideas out there?

Pick up the latest interrupt list on simtel20.  INTER490.ZIP is the
filename you are looking for.  It is what I detailed the current
PCcurses 1.5 beta release hardware detection (all in C) on.  

--
Frotz

Re: Detecting display type (in assembler)

#546

Author: Jeff A Anderson
Date: Thu, 16 Aug 1990 02:04

2 lines
622 bytes

If you want to discover what the display mode is, check memory location
0040h:0049h.  It is a byte that defines the current display mode.

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