CompuPro floppy controller differences

The board has all sorts of jumpers which is good. So I can pick and choose which ones to change with no problem. When reading the book it seems that if you want to use a "minifloppy" drive, there are several components you need to change -- a bunch of resistors, a crystal and a coil. I presume this is to change the recording frequency and spindle speed for 5.25" disks. I'm going to try it without modifications first, but since the HD drive is equivalent to an 8" drive for recording purposes, I don't think I have to change them. As much as I dislike PeeCees, at least they have the benefit of standardization. Rich Rich Cini Collector of classic computers Lead engineer, Altair32 Emulator Web site: http://highgate.comm.sfu.ca/~rcini/classiccmp/ Web site: http://www.altair32.com/ /***************************************************/ -----Original Message----- From: cctech-bounces at classiccmp.org [mailto:cctech-bounces at classiccmp.org] On Behalf Of Chuck Guzis Sent: Saturday, September 16, 2006 1:47 AM To: cctalk at classiccmp.org Subject: RE: CompuPro floppy controller differences On 9/15/2006 at 9:37 PM Richard A. Cini wrote: What Dave said, but a few reminders. First, make sure that the drive is jumpered for high density by default, since the density select line won't be active on the 8" connector. Most 1.2MB 5.25" drives are jumpered to provide DISK CHANGED/ status on pin 34; I believe the Disk 1 requires READY/, so change your jumpers accordingly. Cheers, Chuck