I found a VTech UDC card today in some equipment that a mate swapped with me.
Can anyone with experience with this card verify that the SONY 51W drives work with it, and does anyone have a pinout for using Chinon drives? The VTech manual states that it support CHinon, but not what model numbers. I have a few Chinon mechs, including some high densitey mechs, in the spares.
It also states something about smart port HDDs, but IDK which drives it allows. Does it work with the Apple HD20?
I have a couple of those. They will work with most 3.5" drives, but I have mostly used the ones that VTech/CPS sold. Do not plug an Apple UniDisk 3.5 into them though.
Do you have any details on what Chinon mechs they use, and what the drive pinout is to use them on the DA-19 connector?
I can make cables, should my Chion mechs work, but I lack any form of schematic for wiring them, or what specific Chinon drives the card supports.
Did VTech happen to build HD20 support into this card?
there were at least two different UDCs; long card and short card.
Long card purportedly works with UniDisk 3.5, but short card does not.
There have been reports of short card working with UniDisk 3.5 when fitted with ROM from the long card, but I've not personally verified it.
HD20 is very different beast. nothing works with it except old compact Mac floppy port.
Details? None other than I have a few Chinon drives, but I'd have to open one up to tell you more than that.
As for UniDisk 3.5, I would not try it myself, long or short card. I can tell you from experience that you can exchange the ROMs between the long and short version as one of my cards is long and one is short and one of them the ROM went bad, but a copy from the other card was made and it still works. I don't remember which one was the one that went bad off the top of my head, that was like 30 years ago.
I do not own a UniDisk 3.5, so, that is a non-issue. If you have a VT 3.5 drive and can open it to photograph it, that would be a start. Knowing what hinon models they use, and how they are wired is what I need to know. I'm not entirely sure that I need to use this card, but it might be handy in a pinch.