home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!sybus.sybus.com!myrddin!tct!psycho!f20.n3603.z1.FIDONET.ORG!brianh
- From: brianh@f20.n3603.z1.FIDONET.ORG (Brian Heyboer)
- Sender: ufgate@psycho.fidonet.org (newsout1.24)
- Newsgroups: comp.sys.amiga.misc
- Subject: Re: Correct, Not Correct,
- Message-ID: <26285.2AA48199@psycho.fidonet.org>
- Date: Tue, 01 Sep 92 23:15:11 EDT
- Organization: FidoNet node 1:3603/20 - Mercury Opus NEC360, St Petersburg FL
- Lines: 35
-
- In a previous message, bdonison@cookie.UVic.CA (Only AMIGA!) writes:
-
- OA> PC HD drives are great. The speed is controled via software so they can
- OA> even read/write Mac floppies. At least the ones that actually folow the
- OA> standard and not just faking it with their own BIOS. And they are cheep!
- OA> It would have been nice if the new Amiga HD drives were PC HD drives
- OA> with different controlers set at the correct speeds for 880K and 1.76K,
- OA> then someone could write a DOS driver for them.
-
- PC high density floppies spin at a fixed 300 RPM. Most I've looked
- at use the same Hitachi HA13432 motor control chip. Perhaps it is the
- transfer speed you are referring to (not that I've actually seen
- anything other than the standard 250/500/1000 KBaud)? The max data
- transfer speed of the Denise is 250 KBaud. Thus, the drive spin speed
- must be slowed to do twice the density. This is NOT how the IBM/clones
- accomplish the task -- they change the transfer rate.
-
- Please tell me a program on the IBM which will read any Mac format other
- than the SuperDrive HD format. With the SuperDrive in HD mode, the Mac
- no longer uses multiple speeds. But for all other drives/modes, they
- use multiple speeds and I have yet to see anything on any other platform
- that can read the disks without special interfacing hardware (such as
- Sybil and AMAX-II+).
-
- You are right that it would be nice if the Amiga drives were standard
- HD drives -- but that's just not possible with the current hardware.
- A lot of folks have been trying to tell you these facts, but you
- continue to ignore them.
- * SLMR 2.1 *
-
- --
- Internet: brianh@f20.n3603.z1.FIDONET.ORG
- UUCP: ...!myrddin!tct!psycho!20!brianh
- Note:psycho is a free gateway between Usenet & Fidonet. For info write to
- root@psycho.fidonet.org.
-