Path: utzoo!mnetor!uunet!husc6!ncar!gatech!mcnc!decvax!decwrl!hplabs!hp-pcd!hplsla!tomb From: tomb@hplsla.HP.COM ( Tom Bruhns) Newsgroups: comp.sys.amiga Subject: Re: what sort of 3.5" disk drives? Message-ID: <5160010@hplsla.HP.COM> Date: 22 Mar 88 01:31:14 GMT References: <8621@g.ms.uky.edu> Organization: HP Lake Stevens, WA Lines: 23 Anyway, I just took a look in the Hardware Reference Manual (HRM?) and found out that there is *one* difference -- the drive is supposed to remember the state of it's motor. It didn't talk about any other . . . -- <---- David Herron -- The E-Mail guy ---------- I think this just refers to the interface ckt between amy and the drive. It basically is a latch, and a circuit to echo back the hex FFFFFFFF that the hw manual also mentions (or 55555555 in the case of a 5-1/4" drive). I built the intfc ckt for a 5-1/4 and found it worked fine, except that I had to latch the (step) direction line; my particular Fujitsu drive wanted it held for longer than the hundred or so microseconds amy held it after a step command. So -- the Sony drive should be fine if it's like the one I have a manual for. My comments refer to external drives for an A1000 -- don't know just what they put in an A2000, and how much the drive+intfc is supposed to supply in that case. Tom Bruhns ...!hplabs!hplsla!tomb