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- Path: sparky!uunet!ogicse!uwm.edu!spool.mu.edu!caen!mtu.edu!abcd.Houghton.MI.US!Jim_Johnson
- From: Jim_Johnson@abcd.Houghton.MI.US (Jim Johnson)
- Newsgroups: comp.sys.ibm.pc.hardware
- Subject: Re: Using two video cards at once (EGA and VGA)
- Message-ID: <Jim_Johnson.089q@abcd.Houghton.MI.US>
- Date: 8 Sep 92 03:30:28 GMT
- Article-I.D.: abcd.Jim_Johnson.089q
- Distribution: world
- Organization: Amiga BitSwap Central Dispatch
- Lines: 21
-
- If your overhead display will accept monochrome (MDA or Hercules) output,
- you are in luck. You can run one color display card (address B800) and one
- monochrome display card (address B000) in a system at the same time. There
- is usually a jumper on the motherboard which tells the system which is the
- default device at boot time (and sometimes jumpers on the video boards).
- You can switch between them via DOS using the MODE MONO or MODE CO80
- commands. Some software will automatically support (or maybe even
- require!) both displays and send text to the mono and graphics to the color
- display.
-
- Without a special video card however, it is not possible to have two color
- display cards in the same system as both will try to use the same address.
-
- A possibility is to use an EGA card with one of the boxes that sends the
- video to two monitor ports - one port for your overhead projector, and the
- other port for your monitor.
-
- -- Via DLG Pro v0.995
-
- Jim Johnson-
- *** Remember, they're only tools - Not a way of life! ***
-