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- Path: news.db.erau.edu!byrnee
- From: byrnee@news.db.erau.edu (Sketch)
- Newsgroups: comp.sys.cbm
- Subject: Re: 1571
- Date: 12 Feb 1996 21:54:06 GMT
- Organization: Embry-Riddle Aeronautical University
- Distribution: world
- Message-ID: <4foctv$hlh@deadbird.db.erau.edu>
- References: <313762717@f0.n4.z97.ftn>
- NNTP-Posting-Host: 155.31.7.105
- NNTP-Posting-User: byrnee
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-
- MICHAEL AURELIO (MICHAEL.AURELIO@eastside.igate.net) wrote:
- : DF>OK, another dumb question. Does the 1571 read both sides without
- : DF>flopping a disk?? know some PC's do that, and yes i read my 'book', but
- : DF>do not know what it is tlling me, I guess. Have only used 1541's before,
- : DF>and just realized from stuff I read here that the 1571 has 2 heads? The
- : DF>better to read you with (my dear9 to paraphrase???Or just to go bonkers?
- : DF>told you it was a dumb question...but do need an answer.
- : ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~`
- : The 1571 does read both sides of the disk without flipping it over...
- : Keep in mind that the double sided mode is commonly used in the
- : Commodore 128 Burst mode.....
-
- The 1571 does have two heads, one for each side, but the second head is only
- used for reading double-sided (1571-formatted) disks. There is no way to read
- the second side of a 1541 "flippy" disk without physically flipping the disk
- over. There IS a command to tell the drive to use head 1 rather than head 0,
- which will let you format the second side of a disk individually, but it is not
- compatible with 1541 disks. (The files could only be read on a 1571)
-
- You can format disks in double sided mode, and the second side will be used
- automatically. If you boot on a 128 in 128 mode, it will default to double
- sided mode unless there is a single-sided disk in the drive. If you boot in
- 64 mode it will default to single-sided mode, for compatibility with a 1541.
-
- : However, I have been told that you can access double sided mode on the
- : C64 ( nobody has told me how to do this yet )
-
- Send the disk command U0>M1. IE:
-
- OPEN 15,8,15,"U0>M1":CLOSE 15
-
- The drive will then be in double sided mode. Format a disk, and it will have
- over 1300 blocks free. It just won't be as fast as it would in 128 mode.
-
- --
- C'ya // Amiga 500/2000 Atari 2600 PONG! //
- Sketch \X/ Commodore 128 Intellivision ColecoVision \X/ byrnee@db.erau.edu
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