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Northstar Advantage Hard Drive Controller

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David Jones

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Dec 4, 2019, 3:13:43 PM12/4/19
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I was wondering if anyone out there has an Advantage hard drive controller card. Or has reversed engr'd it and has a cad drawing that can be used to get a board made? I have an Advantage I'd love to put a hard drive in.

Thanks
David

Evan Allen

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Mar 21, 2023, 9:44:37 PM3/21/23
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A few years on, but yes, I just finished my KiCAD of the hard drive controller. I've got one that's supposedly broken and an MFM drive emulator to test it with. I haven't validated my controller design will work, but if I can fix this official one then I'll have a gold standard to check against and I can validate my design.

Robert Stek

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Oct 11, 2023, 8:27:19 AM10/11/23
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Evan - Have you made any progress on the hard drive controller? My Advantage is working and I have a DREM HD emulator but no controller/

Evan Allen

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Oct 11, 2023, 12:42:50 PM10/11/23
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I validated that the controller I based the design off of works, but I have yet to build and test one of my custom boards. I can send you a blank one if you'd like or you can wait until I build one up to test. It has a couple of challenges being that it needs at least one delay line and bipolar prom (hard to find/need modern equivalent). I can do that substitution as well, but if you want to take that on go right ahead.

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