Anyone remember ide bus master probs in win95?

[TheBigZ]

A friend just dropped his pc off to me. His cdrom drive stopped working a couple weeks ago. The bios sees it fine and the drive is confirmed functional. But device manager shows that the primary & secondary bus master ide controllers are the culprit. Now I vaguely remember goin thru this with several other older win95 boxes... somethin about realmode drivers? But I could sure use a quick reminder from the folks here as opposed to tryin root thru my old notes or the MS KB. Fwiw, the cdrom is an old 8x Mitsumi & the pc is a non-brand clone. He "claims" he didn't install anything that might have triggered this.

Thanks in advance.

 

[Basse]

Whats the spec of the mainboard chipset?

/B

 

[DaveJ]

Run Regedit and do a quick search for NOIDE, delete any references you find... Also, check the Performance tab under System in the Control Panel, and see if the drives are listed as MS-DOS Compatibility mode, if so, the NOIDE trick should work...

[edit] Also, make sure you're not loading any realmode CD drivers in your config.sys or autoexec.bat, they'll show up usually as device=mtmcdai.sys /d:mscd001, or something like that.

Dave

 

[klod]

This may help. I also remember something about missing .vxd files on the Win95 install. If the above doesn't help, you might try looking for these on your Win95 disk.:
configmg.vxd
ios.vxd
ntkern.vxd
vcomm.vxd
vdd.vxd
vdmad.vxd
vmouse.vxd

 

[bacillus]

if the noide entry is present, look for it in
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\VxD\IOS
You should see a value named "NoIDE". Delete it, close regedit and reboot!

 

[TheBigZ]

It is running in compatability mode, but there were no noide instances in the registry. It's an old VXPro chipset... some off brand board, don't remember the brand name, but I had a couple myself & remember that I hated them.
I'll check the vxd list.

 

[bacillus]

it's possible that you may have a "bad" master boot record.
the master boot record may not be really bad but if Win doesn't like it then your stuck in DOS Mode and no CD-rom support. suggest you try to do a quick FDISK /MBR from a good boot floppy if no other solutions are forthcoming!

 

[TheBigZ]

Hmm... that rings a bell Bacillus. Will a boot disk from a ME or 2K box work, or does it hafta be a 95 boot disk?

 

[HayZeus 2000]

Another thing to consider is the possibility that he picked up a virus like Anti-CMOS. I've seen that particular little ah heck take out CD-ROM functionality many a time, and since you've already checked the registry for the NOIDE key, I'd think it would be worth a scan.

 

[bacillus]

TheBigZ, hope this helps. forgot you were using win 95 here so it'll probably have to be a 95 boot disk but try the command prompt avenue!

 

[TheBigZ]

Well, my friend SWEARS he tried fdisk /mbr at least twice, but when I ran it, everything snapped back into place instantly. It's back in 32bit mode, and the cdrom is back. You;d think by now I'd have learned not to take anything the user tells me seriously. Again, thanks guys, you've saved me some headaches, and I'll make some notes on this for nest time.