Alternatives to the XT-IDE interface.

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Alternatives to the XT-IDE interface.

Postby Carcenomy on Sat Dec 11, 2010 6:19 pm

I'm definitely not the only one who wonders about this sometimes, so I'll throw it out there to the general populace to see if there's a real answer.

I got my goodies from YetiSeti today and have started having a play. The Amigas worked pretty good first pop - one's perfectly operational, the other seems a little flakey on the floppy drive front. The Ataris were both perfect. But the PC10-III... lord help me...

So the machine runs alright - it powers up sweet although had flickering characters broken video output when I started. Turns out the last owner had fitted a Microsoft InPort mouse card and an EGA graphics adapter. After removing these erroneous extras, the machine fires up great - except the hard disk wouldn't fire up correctly. It spins up but the head stepper sounds like there's interference. I've tried loads of tricks to get the drive responding, but no dice. I even tried the near identical WD drive out of my A590... it was even worse, it appears to have stuck heads and won't spin up.

Now the A590 that doesn't worry me, because it can use SCSI. But the PC10... it uses a fairly specific looking interface. It's early WD, what is branded by Commodore as 'XT-IDE'. It's some form of ancient 8-bit IDE interface that's incompatible with more traditional 16-bit IDE. Curses!

What I would like to know is, is there an effective replacement part that can be used in these scenarios? Clearly the 16-bit IDE units won't function as half the bus is missing, but is there anything else that could be used? Information seems sporadic at best...
Just the local Commodore hobo and middle-aged PC hoarder.
eisa on Trademe. A lasting reminder of a Compaq fetish when I was younger.
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Re: Alternatives to the XT-IDE interface.

Postby ZL2AOX on Sat Dec 11, 2010 8:04 pm

I've currently got three separate XT-IDE controller cards + HDDs that all work in my PC10; the one that originally came with it, plus two others (a SCSI and an IDE) which I pulled out of Sanyo MBC-675s.

From the PC10 manual, jumper JMP 208 should be in the A position if you're using an external controller (in an expansion slot). It should be in the B position if you're using the onboard controller and connecting a drive directly to the motherboard header (e.g. an A590). I understand you would also need to set a jumper (or switch) on the A590 itself to change it from SCSI to IDE.

However, as I already mentioned in a PM, I'm looking to upgrade to an XT-IDE card when more kits become available.

Also, from what I can gather, CF memory cards might work with the onboard controller since they're XT-IDE compatible.
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Re: Alternatives to the XT-IDE interface.

Postby Carcenomy on Sun Dec 12, 2010 6:35 pm

The best question is, "what can be connected to the 8-bit XT-IDE interface"? I mean sure I could stick in a controller card, but I really don't want to do that - there's a fine controller onboard that works. What options as far as 8-bit IDE drives were made available over the years, and did anyone ever build some form of adapter? Really, the ideal method would be some kind of neato adapter that allows a 32MB CF card attach to the 8-bit IDE interface...
Just the local Commodore hobo and middle-aged PC hoarder.
eisa on Trademe. A lasting reminder of a Compaq fetish when I was younger.
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Joined: Tue Aug 12, 2008 10:59 pm
Location: Invercargill


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