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Resource Issue - Mobo problem?

By maggyver ·
OK, gang, I'm stumped. Replaced mobo on system and I suspect an incompatability issue somewhere. Abit VT6X4 (Via 133a chipset), BIOS rev. TG. PIII 500, 128MB PC100 SDRAM. 9.1GB Wide Ultra 2 SCSI HDD on Adaptec 2940-UW Pro adapter. ATI All-in-Wonder 128 Pro PCI, Soundblaster PCI 512, 3Com 3C905-TX NIC.

Reformatted & reinstalled Win98SE. IRQ 14 conflict with IDE controller (needed for ATAPI CD-ROM) and ACPI Holder for PCI IRQ Steering. Tried Via's Bus Mastering driver, then switched to MS DualPCI IDE Controller, still a resource conflict. By disabling onboard Serial, onboard USB & 2 ACPI Holders, I was able to get IDE controller enabled properly, but when introducing the sound & NIC I had to manually assign free IRQ's to ACPI Holders andenable them, which sent the display adapter to IRQ 14, thereby disabling the IDE controller again. All further attempts to reassign IRQ's failed.

I saw someone suggest in the forums to set IRQ's 14 & 15 to manual (not PnP) in the BIOS. Anyone know if this would make a big difference, or is there an inherent incompatability between Via chipset & ACPI? (I've seen messages elsewhere to this effect) Many thanks to anyone with feedback.

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Resource Issue - Mobo problem?

by mphoffar In reply to Resource Issue - Mobo pro ...

My first suspect would be the scsi controller. I'd remove that and before rebooting, make sure all my bios settings for the HD were set for IDE and see where it rolls from there.

Also, one of the VIA boards I've worked on had a miniport driver that needed to be installed for certain IRQ assignments to work correctly, so this may be a though.

I'm assuming you're getting the updated drivers from abit and not via. Although one would think, get them from VIA, not all the updates will work with all the motherboards.

Good luck to you

Mark

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Resource Issue - Mobo problem?

by maggyver In reply to Resource Issue - Mobo pro ...

It turned out to be the need for manually assigning IRQs to everything in the BIOS. SCSI controller was the only thing that DID work from the beginning. Thanks for responding though!

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Resource Issue - Mobo problem?

by Paul D. Masley In reply to Resource Issue - Mobo pro ...

The via 133a chipset is a PITA to set up. Remove all cards except the scsi and your video. Boot from your ERD or startup. Set your bios to find the scsi and place your Periphels to auto. Disable your com ports. Let the system set your SCSI IRQ. Fdisk your harddrive to your liking. The system should place your cd on either IRQ 14 or 15. Reboot system to CDROM support, and install SE. Do a complete install, including the 133a drivers. Then install the video drivers. Install the NIC, reboot, then the printer, reboot, then sound card. This should put the NIC on IRQ3 or IRQ4, Sound on IRQ5, Printer on IRQ7, The SCSI on IRQ10, PS/2 mouse on IRQ12, Video on IRQ13 and the cd on IRQ15. I hpe this helps.

Paul.

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Resource Issue - Mobo problem?

by maggyver In reply to Resource Issue - Mobo pro ...

You were on the right track with IRQ assignments, but I used manual assignments instead of allowing the BIOS and the OS to assign them. Now it's working beautifully - but if I wasn't familiar with IRQs, I would have gone crazy with this! :)

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Resource Issue - Mobo problem?

by maggyver In reply to Resource Issue - Mobo pro ...

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