ID Number: Q42925
5.10
MS-DOS
buglist5.10 fixlist6.00
Summary:
Part 3 of the Microsoft C Optimizing Compiler version 5.10 README.DOC
states the following:
If you have both a Hercules monochrome card and a color video card,
you should invoke MSHERC.COM with the /H (/HALF) option. The /H
option causes the driver to use one instead of two graphics pages.
This prevents the two video cards from attempting to use the same
memory. You do not have to use the /H option if you have only a
Hercules card.
However, the /H option fails to work correctly on a system with two
video cards when one of the cards is a compatible Hercules card. This
is not a problem with MSHERC.COM. The source of the problem lies in
the graphics library provided with C version 5.10 and QuickC version
1.01.
You also must use the DOS MODE command to activate the monochrome card
prior to sending output to the Hercules display adapter.
Microsoft has confirmed this to be a problem in C version 5.10 and
QuickC version 1.01 (buglist1.01). This problem was corrected in C
version 6.00 and QuickC version 2.00 (fixlist2.00).