Path: utzoo!attcan!uunet!husc6!uwvax!rutgers!att!mtuxo!mtgzz!drutx!druhi!dlm
From: dlm@druhi.ATT.COM (Dan Moore)
Newsgroups: comp.sys.atari.8bit
Subject: Re: Was: Flight Sim II <=> XF551 incompatible forever
Message-ID: <3720@druhi.ATT.COM>
Date: 14 Nov 88 16:57:15 GMT
References: <1243@leah.Albany.Edu>
Organization: AT&T, Denver, CO
Lines: 25

in article <1243@leah.Albany.Edu>, jac423@leah.Albany.Edu (Julius A Cisek) says:
>  On a similiar note, does anyone know if it is
> possible to program the percom drive to handle enhanced format?  If it
> can handle ss/sd, ss/ds, ds/sd, ds/dd, then why not the enhanced density
> used by the 1050?  From what I understand the percom has a programable
> drive controler.

	The Percom controller will work with any disk format with sector
sizes less than 256 bytes.  Enhanced format will work, you just have to
reprogram the controller.  PERCOM drives have 2 or 3 special SIO
commands that allow you to set the number of sectors per track, the
sector size and the encoding method (FM or MFM).  The drives support
"any" number of sectors per track, limited only by how fast the drive is
spinning and sector sizes up to 1024 bytes, though only the first 256
bytes are actually readable.

	I don't have an 8 bit or my doc's on 8 bit hardware anymore or
I'd post the commands that were used by PERCOM.



				Dan Moore
				AT&T Bell Labs
				Denver
				dlm@druhi.ATT.COM