1. pt75.exe Driver
2. Manual.txt File Contents

Manual.txt Driver File Contents (pt75.exe)

Table of Contents
1. Introduction	1
1.1 OPERATING SYSTEM AND SOFTWARE SUPPORTED	1
1.2 VIDEO MODES	1
2. PT75 Windows 95 Driver Installation	2
PT75 Windows 3.1.x and Windows for Workgroups Driver	3
3.1 DCI SUPPORT	3
3.2 INSTALLATION INSTRUCTIONS	3
4. PT75 OS/2 2.1 and 3.0 Driver	4
4.1 INSTALLATION CONSIDERATIONS	4
4.2 INSTALLATION INSTRUCTIONS	4







1. Introduction
This installation document describes the video modes and drivers available for different operating systems, utilities 
and applications. For each driver, a list of switches (if any) and the installation procedures are discussed.
The AOpen PT75 integrates the S3 ViRGE video accelerator.  The S3 ViRGE supports the following features:
? S3 ViRGE based 64-bits 2D/3D graphics / video chip, integrated 135 MHz True-color RAMDAC and dual-clock synthesizer.
? Extended graphics modes providing 640640x480,800x600,1024x768,1152x864,1280x1024,and1600x1200 High Resolution.
? Extended text modes providing 132x25,132x28,132x44,100x40,and 80x60 resolutions.
? True Color graphics modes providing up to 1024x768 resolutions.
? Hi-Color (16 bit/pixel ) graphics modes providing up to 1280x1024 resolutions.
? Up to 85 Hz vertical scan refresh rate.
? DDC ( Display Data Channel ) monitor communications support.
? Full hardware and BIOS support for VESA Display Power Management Signaling ( DPMS ) monitor power saving modes.
? Multimedia supports S3 Scenic Highway , 8-bit bi-directional feature connector.
? Register and BIOS level compatibility with IBM VGA adapter.
? S3d Graphics Engine providing functions such as flat and gouraud shading, perspective correction, alpha blending, Z-buffering, depth 
cueing and fogging. MIP-mapping, bi-linear and tri-linear texture filtering, vertical interpolation for video playback.
? Support for indeo, Cinepak, and software MPEG-1 full-motion video playback.
? S3 streams processor providing high-quality hardware-assisted video playback with horizontal interpolation.


1.1 Operating System and Software Supported
This document describes the driver and utility installation procedures for use under Microsoft Windows  95, 
Microsoft Windows 3.1, and OS/2.
1.2 Video Resolutions Supported
All of the video modes available to your monitor, when using the AOpen PT75, are listed in Table 1.
Table 1: Video Resolutions Supported
Resolution
2 MBs DRAM
4 MBs 
DRAM
640X480X4
YES
YES
640X480X8
YES
YES
640X480X16
YES
YES
640X480X24
YES
YES
800X600X4
YES
YES
800X600X8
YES
YES
800X600X16
YES
YES
800X600X24
YES
YES
1024X768X4
YES
YES
1024X768X8
YES
YES
1024X768X16
YES
YES
1024X768X24
NO
YES
1152X864X8
YES
YES
1280X1024X4(IL)
YES
YES
1280X1024X8
YES
YES
1280X1024X16(IL)
NO
YES
1600X1024X4
YES
YES
1600X1024X8(IL)
YES
YES

2. PT75 Windows 95 Driver Installation
The Windows setup program installs and modifies all of the necessary files. Follow these steps to install the 
Windows 95 driver.
Step 1 Insert the installation CD-ROM.  The installation program will automatically start.
Step 2 Click the Display Drivers button.
Step 3 If the installation is successful, you will be asked to reboot your computer.  Click Yes to reboot and 
activate your new display driver settings.
The Windows 95 AOpen PT75 driver installation is now complete.

3. PT75 Windows 3.1.x and Windows for Workgroups Driver
The section provides instructions for using the installation CD. The following installation procedure loads drivers 
and related files onto your PC.
3.1 DCI Support
With ViRGE hardware, DCI-compatible applications can use the DCI Provider and by-pass GDI. The DCI Provider 
uses the off-screen video memory as a cache for color space conversion, hardware stretching, and filtering of 
video data. The S3 DCI driver enhances performance by improving direct screen access, color-space conversion, 
and filtering.
3.2 Installation Instructions
The Windows setup program installs and modifies all of the necessary files. Follow these steps to install the 
AOpen PT75 Windows 3.1, Windows 3.11, and Windows for WorkgroupsT driver.
Step 1 Exit from Windows.
Step 2 From the DOS prompt, change to the directory D:/PT75/WIN31/DRV.
Step 3 Type INSTALL.
Step 4 Follow the instructions on the screen for your system configuration.
Step 5 Restart Windows.
The AOpen PT75 driver for Windows 3.1, Windows 3.11 or Windows for Workgroups installation is now complete.

4. PT75 OS/2 2.1 and 3.0 Driver
This section describes AOpen PT75 OS/2 driver and installation instructions.
4.1 Installation Considerations
1) You must know the maximum vertical refresh rate as well as the maximum resolution supported by the 
monitor.
2) When installing the S3 driver to replace a non-S3 driver (e.g., SVGA), the standard IBM VGA driver must be 
installed first. This is not required if you are replacing an S3 driver.
3) An S3 chip-based card must be installed in the computer before you install the driver. (The driver reads 
information from the accelerator chip.)
4.2 Installation Instructions
The OS/2 setup program installs and modifies all of the necessary files. Follow these steps to install the OS/2 
driver.
Step 1 Boot up OS/2 in the VGA mode.
Step 2 Save all open data files before continuing the S3 driver installation.
Step 3 Close the Win-OS/2 session and all Seamless Windows applications. (Seamless applications are 
Windows applications that run on top of the PM Desktop.)
Step 4 Open an OS/2 command prompt (windowed or full screen).
Step 5 Insert the CD into the diskette drive D.
Step 6 Type D.
Step 7 Double click on the OS/2 System icon.
Step 8 Double click on the System Setup icon.
Step 9 Double click on the Display Driver Install icon. 
 A Display Driver Install dialog appears.
Step 10 When prompted by the Display Driver Install dialog, select Primary Display and click the OK button.
Step 11 Select the S3 ViRGE option from the Primary Display Adapter Type dialog and select the OK button.
Step 12 Select the appropriate option from the Monitor Configuration/Selection Utility dialog, and click the OK 
button.
 The Source Directory dialog appears.
Step 13 Select Install.
 The Installation Program may pause and display prompts to overwrite certain files.
Step 14 Answer YES for each file.
 A shut down message appears.
Step 15 Click the OK button.
Step 16 Shut down and reboot system.
 After you reboot, the system comes up using the newly installed driver.
 Also refer to the README.TXT file for updata information under directory "/PT75/OS2".

AOpen PT75 
S3 ViRGE
Software Installation Manual


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