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VL bus ide problem

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First post, by balthazor4ever

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Hi everyone. After destroying my first 386/486dlc mobo, I found a 486/386 hybrid motherboard with 3 vl buses (MB-4D50L). I then installed the 486dlc-40 256kb of cache a cl-gd5428 vl bus vga and a holtek vl bus ide. The pc works and reads my 386 conner hdd from 1992 just fine. It runs dos 6.22 and windows 3.11 just fine. I run some benchmarks and everything seems fine in general. When I try to install any game from the cd-rom drive I get error messages and after running scandisk it reports corrupted directories. All the old data is ok but none of the newer files gets written correctly. Does anyone have any idea what might be the problem? Are 40Mhz to much for the vl bus?

Reply 1 of 3, by bjwil1991

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It doesn't matter how fast your machine is for the VL Bus. It depends on the speed that's set for the VL Bus in either the BIOS itself or the jumpers. Try putting the VL Bus in a lower speed and see what happens.

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Reply 2 of 3, by Zup

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Actually, VESA local bus is synced and locked to the FSB speed. And yes, maybe 40 MHz can be too fast for some cards (but not most). Going down to 33 MHz may help.

BTW... somebody made a stable VLB system with a 486DX/50?

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Reply 3 of 3, by balthazor4ever

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I finally found it! There are two jumpers on the card labeled speed. I tinkered with the settings. I found a combination of the two with which both floppy and HDD controllers are recognized and I have no data loss on the HDD!

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