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1996-01-18
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1-19-96
GDS7548 WIN95 Driver Release 1.20
----------------------------------
Changes from 1.10 to 1.20
=========================
Note: Only use this driver with GD7548 rev.CE and PCI/VLB bus. Don't use
it if you have GD7548 rev.BD and PCI bus.
-Fix problems. See Problem Solved below.
-Copy DVIDEO.DLL to system directory and change 754x.inf to include this
file so MVA can be enabled while performing video playback.
-Add memory map support for the display driver.
-Add VPM support.
-Add hot-key display switching without using power.drv.
-Display driver name is changed from CIRL.DRV to CIRLMM.DRV.
-Added Direct Draw support.
-Added Far East character support (Traditional Chinese, Simple Chinese
Korean & Japanese)
Resolutions & Colors supported
===============================
640x480 256 colors (CRT/Panel/SimulSCAN display & all panels)
800x600 256 colors (CRT display and all 8x6 panels)
1024x768 256 colors (CRT display only)
1280x1024 256 colors (CRT display and 2M video memory)
640x480 64K colors (CRT/Panel/SimulSCAN display except 8x6 DSTN panels)
800x600 64K colors (CRT display & 8x6 TFT panel only)
1024x768 64K colors (CRT display and 2M video memory)
640x480 16Mil colors (CRT display and 6x4 TFT panel only)
QA Notes
========
-QA cannot verify any features that require interaction between the system
BIOS and the VGA system. A full functional notebook system is required
to complete beta/production level testing.
-VPM is being tested using Pixel's TV-Tap as a client, attaching a tv indoor
antenna, & a video camcorder/player as sources of video input. Another VPM
client, Margi's MPEG decoder, is also being used to test mpeg video playback.
The following resolutions, color depths & vertical refresh rates are
supported by the VPM Provider:
RESOLUTION COLOR DEPTH VERTICAL REFRESH RATE
---------- ----------- ---------------------
640x480 256 colors 60 Hz
800x600 256 colors 60 Hz
1024x768 64K colors 60 Hz
640x480 64K colors 60 Hz
800x600 64K colors 60 Hz (2M video memory only)
Problems Solved
===============
-In some APM implementation, hot-key switching display may cause a blank
panel screen.
-In 800x600 64k colors, user is able to set new monitor refresh but the
new refresh does not take effect.
-Open DOS full screen, switching to SimulSCAN via CL Win95 Refresh utility,
Alt-Tab to go to DOS full screen and Alt-Tab to go back to Windows Desktop,
the display is corrupted. PDR#3580
-Run DCT smoke (VFW AVI) test in SimulSCAN and it causes lcd to go blank
and CRT displays garbage. PDR#3582
-Winbench 96 video test hangs the system when configured for 3volts.
PDR#3677
-Corruption occurs when toggling between the PM desktop & a full-screen
dos prompt. PDR#3580
-An "illegal operation..." error occurs when running Win95 DCT. PDR#3731
Known Problems
==============
-Bandwidth corruption occurs when performing a video playback using
Compcore's or Mediamatics' mpeg player. PDR#3783
-The video clip from Cinemania 95 will move out of its video window
after moving the application around the desktop. PDR#3764
-Winbench 96 causes the Panel display to blank out. PDR#3612
-If a windowed DOS prompt is open in any non-TV display mode, switching to
TV causes a display corrruption.
-In some notebook systems, use hot-key to switch display when a DOS screen
is opened would blacken bottom part of screen.
-Running the Win95 DCT Smoke All test causes the panel display to blank
out. PDR#3776
-Toggling between a windowed-DOS prompt & the desktop while performing a
video playback causes an illegeal operation. PDR#3777
-CRT display shrinks & panel display blanks out when running Winstone 96.
PDR#3793
-Bandwidth corruption occurs when moving the TV-Tap video window around the
screen. PDR#3670
-Downscaling the video window during video playback causes color corruption
16 million color depth. PDR#3797
-Zooming the video window in TV-Tap causes a GPF. PDR#3688
-Video image freezes after transferring the video to the TV-Tap remote
control then moving it around the desktop. PDR#3671
-Performing a res-on-the-fly causes TV-Tap to stall. PDR#3672
-System shutdown will hang when TV-Tap is still active. PDR#3679
-Video corruption occurs when performing a video playback in simulscan
display & expansion mode is on. PDR#3476
-Video display turns black when maximizing the video window in TV-Tap.
PDR#3666
Win95 Driver limitation
=======================
-In TV mode, open any application shows that bottom of the application is
chopped off because TV uses 640x400 resolution mode.
-Switching from any non-TV display type to TV requires Win95 to restart.
This is by design.
-In TV mode, the Win95 logo screen got shifted down because TV uses 640x400
resolution mode.
How to Install 754X Win95 Driver
================================
1. Click on the Start box in the lower left corner and proceed to Settings,
Control Panel.
2. Inside the Control Panel group, click on the Display icon to open the
Display Properties folder and select the Settings tab (right most tab).
3. Choose the "Change Display Type..." button and click the "Change..."
button in the Adapter Type group.
4. Select the "Have Disk..." button and then insert the 754X WIN95 Driver
Installation diskette into the floppy drive A: or B: and proceed with
OK button.
5. "Cirrus Logic 754X (Cirrus)" will be highlighted for a VLB system or
select "Cirrus Logic 754X PCI (Cirrus)" for PCI system.
6. Press OK and files are being copied from the diskette to your computer.
7. If a "Version Conflict" dialog box pops up and asks "Do you want to keep
this file?", answer "No".
8. Press Close again to exit Display Properties folder.
9. Select Yes to restart computer before the new driver will take effect.
How to change colordepth
========================
1. Make sure you have installed the Cirrus Logic 754X Win 95' driver (see
How to Install 754X Win95 Driver section above).
2. Click on the Start box in the lower left corner and proceed to Settings,
Control Panel.
3. Inside the Control Panel group, click on the Display icon to open the
Display Properties folder and select the Settings tab.
4. Click on the pull-down arrow from the Color palette area to select color
depth.
5. Choose OK to restart Win95.
How to change resolution
========================
1. Make sure you have installed the Cirrus Logic 754X Win 95' driver (see
How to Install 754X Win95 Driver section above).
2. Click on the Start box in the lower left corner and proceed to Settings,
Control Panel.
3. Inside the Control Panel group, click on the Display icon to open the
Display Properties folder and select the Settings tab.
4. Ajust the sliding bar either to Less or More from the Desktop area.
5. Choose OK and new resolution will take effect.
How to change monitor refresh rate and display type
===================================================
1. Make sure you have installed the Cirrus Logic 754X Win 95' driver (see
How to Install 754X Win95 Driver section above).
2. Click on the Start box in the lower left corner and proceed to Settings,
Control Panel.
3. Inside the Control Panel group, click on the Display icon to open the
Display Properties folder and select the Refresh tab.
4. You can change to different refresh rates for different resolution and/or
switching to different display type in the Active display area.