本ページは公開が終了したページの複製であり、掲載時点での情報です。本ページに記載されている内容について各所に問い合わせることはご遠慮下さい。

Video Chipset FAQ


(Frequently Asked Questions)

Last updated April 1996

1.0 Purpose

The purpose of this document is to impart to the customer/user of Oak video chipsets, the common knowledge that others have gathered after seven years of technical support efforts. Included will be discussions of the technology as it is today, and its impact on Oak's video chipsets. This FAQ will be updated on an as needed basis to reflect the impact of the latest technical developments on Oak video chipsets. It will also cover technical issues brought up by Oak customers as they relate to our video chipset products.

2.0 Frequently Asked Questions

2.1 What video products does Oak Technology make?

Oak Technology manufactures video chipsets, video BIOS, and base software drivers. Contrary to popular belief, we DO NOT manufacture video cards except for a very small, limited number of design reference cards. This means that, except for a few rare cases, we will not know what the jumper settings are, or what the settings mean on your video card that has an Oak video chip installed on it.
(The following hyperlinks allow you to download text files containing dipswitch setting information for some OTI-037/067 based cards: 037dip.txt and 067dip.txt )

As you have already seen on our Web page, there have been several Oak chipsets:

OTI-037: This chipset is almost nine years old. It was designed when VESA and SVGA were not yet invented. Do not expect this chipset to perform 256 color density in Windows. It will support 256 colors in DOS apps such as Doom and Descent, if those games run at 320 X 200 resolution. There are no drivers available for the OTI-037.

OTI-067/077: These chipsets are now also obsolete, as they are seven and six years old respectively and no longer can respond to today's software demands. You'll find the best performance from these chipsets at the 640X480X256 level. There is a driver in Windows 95 (part of the Install disk set) that will run these chipsets at that level. There are no drivers available for these products to support 64K colors in Windows 95.

These chipsets only are adequate for 16-bit operating systems, and are very slow at 32-bit operating system levels of software performance. Oak Technology NO LONGER provides drivers for these products. However, there are several archive sites on the Web such as ftp.winsite.com that host drivers for these chipsets. You can also try websearch engines such as www.shareware.com (keywords: oak drivers).

OTI-087B/ OTI-087x: These chips are currently being supported with drivers and driver installation help. (Software support has been suspended because of age, so the drivers are those last updated in 1994) . This chipset is five years old. The drivers for this chipset are available via our Web site (technical support page) as well as BBS (Phone #: 408-774-5307).

There are two sets of drivers, one for the -87B chipset and one for the -87X chipset. There are several significant enhancements to the -87X chipset that necessitate a completely different driver set. The method for discriminating between these two is easy. Simply run MSD( Microsoft Diagnostics) from a DOS prompt, and do a video inquiry. Read the resulting info, paying attention to the Video BIOS Revision (Version) Number. If the BIOS Version number is 1.0X, it's an 87B. If the revision number is 2.0X, it's an 87X. A Windows 95 driver exists already for these chipsets and is embedded in the Windows 95 Install disk set. It is also, like the 67/77 chipset, limited to 256 colors.

These chipsets were optimized for operation in a 16-bit operating system, but are not the speediest in 32-bit applications in Windows 95. THERE ARE NO FURTHER PLANS TO DEVELOP SOFTWARE FOR THIS CHIPSET.

OTI-107: This current chipset is Oak's first PCI-compliant chipset, and runs well in Win'95. It was dubbed the OTI-64107 "Spitfire", and is the first generation of the current series by that name. Drivers are available on our Web site and the BBS and are updated as new versions and updates are released.The cards that come with this chipset are largely available with a TV tuner & Vidcap functions. The maximum video memory that can be installed with this chipset is 2 MB.

OTI-64111: This chipset is the latest in Oak's Spitfire line. It supports PCI Bus Mastering, which optimizes video capture performance, and supports software software Codecs by reducing CPU overhead. It has an on-chip EEprom that supports the Plug 'N'Play Standard. There are several speed and resolution enhancements developed in this chipset above and beyond the 107. A digital video camera interface is integrated into the design and there is support designed into the chip for Microsoft's Direct Draw. It supports three types of video memory:hyperpage, fast page, and EDO burst cache RAM. Up to 4 MB can be designed on to the PC board design using this chip. A full complement of drivers for all available operating systems have already been designed for this chipset, adding to its versatility and flexibility. They are currently available only via our BBS line.

2.2 I have just loaded a piece of software that says I must change my Windows video driver to 256 colors. What do I do?

If you already do not have them, you must first obtain the latest revision VGA drivers for your video card. If you have a current product from Oak, these may be obtained from our Web site or our BBS line (you must have a communications package that can call up BBS). All drivers are available for download as zipped files, so you must first obtain the PKUNZIP utility, PKZ204G.EXE, which is available at no cost on the Web (try www.shareware.com ) and is also provided on our BBS. Once these files have been obtained and decompressed, follow the instructions on the readme files that come with the drivers. Once loaded, open the MAIN window, select Windows Setup, select options, change system settings, and select display driver by clicking on the right arrow button. Select 640X480X256 as the nominal driver for use with games, multimedia, etc.

2.3 The game I just loaded into my computer runs slow, and the sound and video are never in sync. My audio/video is choppy. What's wrong?

You are a prime candidate for a video upgrade, as your video card is not responding to the requirements of today's multimedia software. Check the system requirements on the application packaging, and see if it requires a video accelerator. If you have an Oak -037, -067, or -077 chipset on your video card, you need to upgrade to an accelerated video card. You may also have to consider upgrading your computer to a faster processor.

inserted by FC2 system