ID Number: Q73192
3.05
WINDOWS
buglist3.05
Summary:
Microsoft CodeView for Windows (CVW) version 3.05 may be incompatible
with some VGA video systems. The reported symptoms include screen
corruption and/or system hangs that may require a cold boot.
A possible workaround is to treat the system as if it has a
nonstandard VGA monitor.
More Information:
Single-monitor debugging of Windows applications was first made
possible with this version of CVW, and the majority of the reported
display problems have occurred when trying to access the application's
output screen while running on a single monitor. However, similar
problems may occur when using CVW version 3.05 in a dual-monitor
configuration.
Note: Some video problems in CVW may be the result of using special
VGA drivers. CVW is designed to work with the standard Windows VGA
driver (VGA.DRV). If you are experiencing CVW display problems, you
should first check that you have VGA.DRV installed.
If you are experiencing video problems while using VGA.DRV, you should
try working around them by setting up your system for non-VGA or
nonstandard VGA use by doing the following:
1. Place the following line in the [386enh] section of the SYSTEM.INI
file:
device=VCV.386
2. Place the VCV.386 driver in the WINDOWS directory (it is shipped
with CVW 3.05)
3. Always invoke CVW with /V. This is easily accomplished by placing
/V in the Command Line box of the File Properties for CVW.
This method is explained in the README.DOC that accompanies CVW
version 3.05 in a section referring to use of CVW with non-VGA
monitors.
The major disadvantage to using this method is that if the VCV.386
driver is used, the F4 key (view output screen) is not functional.
Whenever you return to Windows from CVW, all Windows applications
(including the one you are debugging) get a WM_PAINT message. This
makes debugging of paint code difficult (if not impossible) because
you cannot see what you are painting one step at a time. This is
usually accomplished by pressing F4 after executing the code being
tested to see if the output is correct. This also means that the paint
code must be relatively functional to debug at all.
The following VGA adapters are among those that have been reported to
have video problems with CVW version 3.05:
Diamond Speedstar version 3.23
Orchid Pro Designer 2 version 3.1
Vega VGA
ATI VGA Wonder
In some cases, it may help to obtain an updated video BIOS from the
video card manufacturer.
Microsoft has confirmed this to be a problem in CodeView for Windows
version 3.05. We are researching this problem and will post new
information here as it becomes available.