Microsoft KB Archive/87282

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VESA Local Bus Diamond Stealth May Cause Hardware Conflict

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Q87282

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The information in this article applies to:


 * Microsoft Windows versions 3.1, 3.11

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SUMMARY
The VESA Local Bus Diamond Stealth video card may conflict with other hardware devices because of the hardware I/O address or IRQ.

NOTE: This information may also apply to other video cards using the S3 video chip set, such as the Orchid Fahrenheit card, or other graphics coprocessor cards, such as the ATI Ultra series.

Hardware I/O Address
The Diamond Stealth S3-based video card has a hardware I/O address of 02E8, which cannot be changed. This may cause a conflict with other hardware devices using this same address. By default, many serial cards and internal modems use this address for COM4. Some ARCnet cards also use this address.


 * If there is a conflict, it may result in garbled TrueType font output when printing.
 * If the conflict is with a network card, then you may not be able to run in 386 enhanced mode.

To correct these problems, change the I/O address of the device conflicting with the Stealth video card.

Hardware IRQ
By default, the Diamond Stealth comes configured to use IRQ2. This is the cascading IRQ to the second Intel 8259 Programmable Interrupt Chip (PIC).


 * If another device is also using this IRQ, you may receive garbled TrueType fonts when printing.
 * If there is a conflict, you may be prevented from running in 386 enhanced mode in Windows 3.0 and 3.1.
 * If there is no conflict, you still may not be able to run in 386 enhanced mode from Windows 3.0.

To correct this problem, you can disable the Stealth's use of IRQ2 by removing a jumper from the video card. Please refer to your Diamond Stealth user's guide for the procedure.

Additional query words: 3.10 1280 8514 stelth windrvr ATIPRO VESA Local Bus card video accelerator cards

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Issue type :

Technology : kbWin3xSearch kbWin310 kbWin311