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- Path: usenet.ee.pdx.edu!not-for-mail
- From: crimson@cs.pdx.edu (bill m howland)
- Newsgroups: comp.sys.cbm
- Subject: Re: sfd-1001 questions
- Date: 5 Jan 1996 03:29:38 -0800
- Message-ID: <4cj232$5m7@sirius.cs.pdx.edu>
- References: <4cdgck$9tn@sirius.cs.pdx.edu> <4cgn3j$ak@wn1.sci.kun.nl>
- NNTP-Posting-Host: sirius.cs.pdx.edu
- Keywords: sfd-1001
- X-Newsreader: NN version 6.5.0 #4 (NOV)
-
- rhialto@mbfys.kun.nl (Olaf Seibert) writes:
-
- >In <4cdgck$9tn@sirius.cs.pdx.edu> crimson@cs.pdx.edu (bill m howland) writes:
- >> I recently got ahold of one of these, and without a manual, I don't know
- >>much about the thing. Can anyone present tell me a bit about the drive, as
- >>far as what makes it unusual? The disk format, and non-1541 commands, etc..
-
- >For disk commands it is pretty much the same as a 1541. I would like to
- >get a hold of a ROM dump though (perhaps you can send me one).
-
- >> What crazy method did they use to get so much capacity?
-
- >It uses 77 tracks (but I'm not sure if it is 2-sided, in which case it
- >would use 2 x 77 tracks) with about 1.5 the bit density. You should
- >use Double Density disks, suitable for use with 77 (or 80) tracks,
- >which is indicated by the "96 tpi" marking. Do not use High Density
- >disks.
-
- >This format is compatible with the 8050 (single sided, 0.5 megabyte)
- >and 8250 (double sided, 1.0 megabyte, well actually a bit more since it
- >is more than 4096 sectors per disk) drives.
-
- >>: Crimson Knight : "Lost in the wheels of confusion, :
- >>: crimson@sirius.cs.pdx.edu : running through valleys of tears...." :
- >>:---------------------------: :
- >>:/\/\/\/\/\/\/\/\/\/\/\/\/\/: -Black Sabbath 1972 :
-
- >-Olaf.
- >--
- >___ Copyright 1996 Olaf 'Rhialto' Seibert. All Rights Reserved.
- >\X/ You are not allowed to read this using any kind of Micro$oft product.
-
-
- I guess this answers the other guy's question on what disk to use.
- I do have some double density-double track (96 tpi) disks, is this the same
- as QUAD and are they the ones you are talking about?
-
-
- --
- : Crimson Knight : "Lost in the wheels of confusion, :
- : crimson@sirius.cs.pdx.edu : running through valleys of tears...." :
- :---------------------------: :
- :/\/\/\/\/\/\/\/\/\/\/\/\/\/: -Black Sabbath 1972 :
-