23 Oct
2025
23 Oct
'25
6:46 p.m.
On Oct 23, 2025, at 5:01 PM, Doc Shipley via cctalk
<cctalk(a)classiccmp.org> wrote:
On 10/22/25 18:04, Mike Katz via cctalk wrote:
I thought I sent Dave my results for the Pro. I've used it to read RD51 and RD52 (the
one from Quantum). I've emulated those and RD50 and I think also RD53. Don't
remember if I tried emulating any of the other drive models the Pro supports, such as the
other two RD52 flavors. It isn't hard to do that so long as you know the geometry.
BTW, on the Pro all drives have 16 sector tracks, even if they can and do have more
sectors using other controllers.
paul
I just purchased an old Gimix computer (now if
only I can get it from Orlando to Chicago before my friend goes down there for Christmas).
It has an OMTI 20C-1 MFM hard disk controller with a IMI 5018 19MB hard disk drive in it.
I am thinking of trying to upgrade the hard drive. The Gimix System that I worked on had
a half high 20MB drive and a Syquest removable 5MB drive.
Does anyone have an old MFM drive laying around (half high or full height but larger than
18MB) and/or an MFM removable cartridge drive with cartridges?
Pretty sure Mr Gesswein is on this list but I don't see him post often. Anyway, he
designed a very handy MFM drive emulator:
https://www.pdp8online.com/mfm/mfm.shtml