Due to massive amounts of caffeine & sleep deprivation, Doug Spence said: Every PS/2 that I've ever seen (note: this does not mean All PS/2's... just the ones I've seen) didn't have a 5.25" port at all... not even their tower "servers". I suspect it was IBM (trying to) setting a new standard... again. IIRC, it's just straight thru with the last/first 3 pins unused... but I'd have to look at the cable or ring some pins to be sure (and yes, I'm a packrat...). I also believe that you can still get 37-pin D-sub connectors thru the Mouser Electronics catalog. Good people to work with... I had 3 distinct problems with my first order (totalling $40USD) and they took care of all of them at their expense (shipped some closeout SMD resistors *overnight* because they forgot them in the package... their expense... that's their policy, despite my not being in a rush for them!) Try http://www.mouser.com . All CoCo controllers take Shugart standard drives (now called IBM standard drives... IBM's taking over again!) altho RSDOS limits you to 35 tracks, SSDD, 156K disks (the original Shugart drives) without patches... which (of course) I have. RSDOS can handle a max of 2 DSDD 80 track drives with patches (more accurately... they look like 4 SSDD 80 track drives, with :2 the backside of :0 and :3 the backside of :1) but 1.44Meg storage thru RSDOS is really good! OS-9 can handle 3 DSDD 80trk drives! There are three ways to get into the case, only one of which I recommend. The first method involves a chainsaw and a 12lb (5.5kg) sledgehammer... If you have to ask, you don't want to know. ;^> The second method would require an appropriately sized Torx screwdriver and a Dremel tool with drill press attachment. You would need to drill a small hole in the end of the Torx driver to accommodate the post in the screw. While this method is the safest to the drive, it's also the most work. Method 3 (which is the one I used) requires a pointed instrument (like a leather awl) and a regular (flat-head or slotted) screwdriver that just fit's into 2 of the points of the Torx screw (the screwdriver tip of my tiny Swiss Army knife worked perfectly). Use the awl to bend the post over as much as you can, and this *should* (no guarantees, YMMV, yadda, yadda, yadda...) get you enough room to get enough of the slotted screwdriver into 2 of the star points and extract the screw. As the case is built like a Sherman Tank, once the screws are removed, deep six them. I've been running mine for 3 years without the special screws with no ill effects. Anyway, I hope this helps, and enjoy the drive! Roger "Merch" Merchberger -- Roger Merchberger | If at first you don't succeed, Programmer, NorthernWay | nuclear warhead disarmament should zmerch(a)northernway.net | *not* be your first career choice.