3.5" floppy drive in IBM XT?

----- Original Message ----- From: "Joe" <rigdonj(a)cfl.rr.com> To: <cctech(a)classiccmp.org> Sent: Monday, April 07, 2003 6:12 PM Subject: 3.5" floppy drive in IBM XT? it (and it works!) Anybody ever heard of this? The drive has it's own controller card and both it and the drive appear to be IBM parts. )I haven't pulled everything apart to be sure.) FWIW the computer also has a FH 5 1/4" floppy drive and a HH 5 1/4" 10 Mb hard drive with a Seagate logo on the front of it. Anybody know if this is an original XT hard drive or a replacement drive? It's been so long since I've seen an original XT with the 10 Mb drive that I don't remember much about it. I have a highly original late production XT, with the 640k system board, 720k hh floppy, 360k hh floppy, and full height IBM 20mb hard drive. Interesting features include a Y cable to power both floppy drives from the PSU connector (Y cable has black wires, and a cloth tag with IBM part number 6480173). Also, the 720k drive has a plain blue eject button. The 3.5" drives from the PS/2 series were labelled 1.44m or 2.88m as appropriate. The 360k drive has an asterisk on it, just like on the optional AT 360k drive. Apparently the IBM convention for 5.25" drives was that if it was a full height floppy, drive then it was 360k, if it was a half height drive it was assumed to be 1.2M, unless it had an asterisk, then it was 360k. Mueller's book says that the 640k system board, XT 20M hd, half height 360k drive, and 720k drive were introduced in April, 1986. Hope this helps solve the mystery.... -- Jim Visit the Selectric Typewriter Museum! http://www.mindspring.com/~jforbes2