Chips and Technologies, Inc.
655XX Display Driver Package
Windows 3.1/DOS
Revision: Version 3.2.3
Release Date: January 16, 1996
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NOTES - WINDOWS DRIVERS
1. These drivers support the linear frame buffer. Please note
the following points regarding the Windows 3.1 linear
drivers:
Continued improvement in features and performance.
One driver per color depth supports multi-spatial
resolutions.
Added pen compliance.
PC Video aware.
Supports DCI (primary surface).
Supports panning if driver resolution is more than the
display size of the panel.
Supports display switching using a Control Panel Applet
and/or with a hot key if the OEM BIOS meets the CHIPS
specification for display switching.
NOTE: Display switching is not allowed if Windowed VM
has focus.
WINMEM32.DLL needs to be present in the SYSTEM
directory.
These drivers cannot run in Windows standard mode
(WIN/S or WIN/2).
2. The following list describes the Windows 3.1 driver filenames
and resolutions:
LINEAR4.DRV: 16 Color Multi Res, Pan, Pen, Big
Cursor, Display Switch
LINEAR8.DRV: 256 Color Multi Res, Pan, Pen, Big
Cursor, Display Switch
LINEAR16.DRV: 32K/64K Color Multi Res, Pan, Pen, Big
Cursor, Display
(65535/540 only) Switch
LINEAR24.DRV: 16M Color Multi Res, Pan, Pen, Big
Cursor, Display Switch
(65540 only)
The following drivers function with the F65545 only
VIDGX4.DRV: 16 Color Multi Res, Pan, Pen, Big Cursor,
Display Switch
VIDGX8.DRV: 256 Color Multi Res, Pan, Pen, Big
Cursor, Display Switch
VIDGX16.DRV: 32K/64K Color Multi Res, Pan, Pen, Big
Cursor, Display
Switch
VIDGX24.DRV: 16M Color Multi Res, Pan, Pen, Big
Cursor, Display Switch
3. Some applications, such as CorelDraw, PhotoStyler and
Fotoman, assume 16 color drivers are VGA planar drivers and
renders the image in the planar format. These applications
do not correctly interpret Plane and BitsPixel information
returned by the driver, and are not displayed correctly in
our 4bpp packed pixel driver (LINEAR4.DRV).
The following table compares information returned by two
different formats for 16 color drivers:
VGA.DRV LINEAR4.DRV
(Planar) (Packed)
BitsPixel 1 4
Planes 4 1
Colors 16 16
4.
CHIPS' driver implementation of the Ellipse and Round
Rectangle function is different (one pixel off) from
Microsoft's driver implementation. CHIPS' RoundRect
driver implementation causes a problem where the bottom
line disappears in TCALC.EXE of the ESS Audio card. To
fix this problem, make the following change in the
[DISPLAY] section of the SYSTEM.INI file:
[DISPLAY]
. . .
RoundRect=0 ;disable round rectangle driver
implementation
Ellipse=0 ;disable ellipse driver implementation
By default, the driver implementation for the
Ellipse/RoundRect function is enabled. There will be some
impact on performance by disabling the Ellipse/RoundRect
driver implementation.
5. The following anomalies exist with drivers in the industry
other than CHIPS drivers:
Windows 3.1 MPLAYER.EXE has a problem when displaying
HELP with high color and true color drivers. This
problem is fixed in Windows 3.11 MPLAYER.EXE.
Windows 3.1 Paintbrush has a problem with a black box
appearing when pasting a DIB and immediately flipping
the object horizontally. This problem is in the GDI
and appears in most 256 color drivers.
Windows 3.1 Paintbrush has a problem with low memory
when printing a color image in high color drivers.
This image is successfully printed by doing a cut-and-
paste to Word for Windows.
Windows 3.1 HELP screen has a problem with text
appearing dark (black) instead of green in high color
drivers.
Windows 3.1 DCT ROP3 test has a problem with the 32k
color(15bpp) driver. This problem occurs with other 32k
color drivers.
The TDW(Turbo Debugger) in Turbo C++ for Japanese
Windows 3.1 causes an error which states "Illegal Video
Mode".
Quick Recorder (Video for Windows) has a problem
displaying small fonts in high & true color drivers.
The application does not allocate sufficient memory for
the small font, but it successfully displays large
fonts.
CHIPS CONFIDENTIAL INFORMATION
Download Driver Pack
After your driver has been downloaded, follow these simple steps to install it.
Expand the archive file (if the download file is in zip or rar format).
If the expanded file has an .exe extension, double click it and follow the installation instructions.
Otherwise, open Device Manager by right-clicking the Start menu and selecting Device Manager.
Find the device and model you want to update in the device list.
Double-click on it to open the Properties dialog box.
From the Properties dialog box, select the Driver tab.
Click the Update Driver button, then follow the instructions.
Very important: You must reboot your system to ensure that any driver updates have taken effect.
For more help, visit our Driver Support section for step-by-step videos on how to install drivers for every file type.