Q51870: Dual-Monitor Requires 8-Bit Data Paths for Both Monitors

Article: Q51870
Product(s): Microsoft Programming Utilities
Version(s): 2.2,3.0,3.05,3.06,3.07,3.11,3.14,4.0,4.01,4.05,4.1
Operating System(s): 
Keyword(s): kb16bitonly kbCodeView kbDebug kbVC
Last Modified: 26-JUN-2001

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The information in this article applies to:

- Microsoft CodeView for MS-DOS, versions 2.2, 3.0, 3.11, 3.14, 4.0, 4.01, 4.05, 4.1 
- Microsoft CodeView for Windows, versions 3.0, 3.05, 3.06, 3.07, 4.0, 4.01, 4.1 
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SUMMARY
=======

When you configure a system for dual-monitor debugging, verify that both the
monochrome monitor and the color monitor use an 8-bit data path. Any
dual-monitor write scheme requires a common data path to each display card
(either both 8-bit or both 16-bit). Monochrome adapters available today use an
8-bit path exclusively.

Many display cards that support 16-bit mode automatically sense that they are
addressed in a dual-monitor mode. However, some cards, such as the ATI VGA
Wonder card, do not sense this situation. You must manually configure these
cards to use an 8-bit data path.

MORE INFORMATION
================

If you use dual monitors and experience strange behavior, such as random or
blinking characters on the monochrome screen, verify that your 16-bit color
video card is running in 8-bit mode.

The most common use for a dual-monitor setup is to debug a graphics application
with CodeView.

Additional query words: kbinf 2.20 2.30 3.00 3.50 4.00 4.10 no32bit

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Keywords          : kb16bitonly kbCodeView kbDebug kbVC 
Technology        : kbAudDeveloper kbCodeView kbZNotKeyword3 kbCodeView220DOS kbCodeView300DOS kbCodeView311DOS kbCodeView314DOS kbCodeView400DOS kbCodeView401DOS kbCodeView405DOS kbCodeView410DOS kbCodeView300 kbCodeView305 kbCodeView306 kbCodeView307 kbCodeView400 kbCodeView401 kbCodeView410
Version           : :2.2,3.0,3.05,3.06,3.07,3.11,3.14,4.0,4.01,4.05,4.1

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