Creating new CP-M disks - Progress on IMSAI  Andrew Lynch
lynchaj at Sat Jan 12 17:45:35 CST 2008  Date: Sat, 12 Jan 2008
09:37:06 -0800 From: "Chuck Guzis" <cclist at <> > Subject: Re:
Creating new CP/M disks - Progress on IMSAI  > Date: Fri, 11 Jan
2008 23:50:27 -0500 > From: "Richard A. Cini" <rcini at <> > >
Anyway, one of the issues I have with the Teac FD-55GFR (1.2mb >
high-density; no schematic) drives Im using is that the motor
runs all of > the time (just like an 8 drive) but these late-
model Teac drives dont > have head relays, so the heads are
engaged all of the time.  Since the 8272/765 does drive
"polling", you have to connect DRIVE  SELECT/ to DRIVE SELECT/.
Connecting it to MOTOR ON/ would likely  have some odd effects.
Recall also, that the 765 can do overlapped  seeks on multiple
drives, which requires that the DRIVE SELECT/ line  be what it
says it is.  Which leaves you with connecting HEAD LOAD/ to
MOTOR ON/; not a good  solution if you do a lot of multiple-
drive operation (as CP/M f