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- Newsgroups: comp.sys.apple2
- Path: sparky!uunet!munnari.oz.au!metro!socs.uts.edu.au!yak!posty
- From: posty@socs.uts.edu.au (Andrew Roughan)
- Subject: AE Flopticals...RamFAST & TAPE DRIVES
- Message-ID: <posty.715997845@yak>
- Sender: news@socs.uts.edu.au
- Organization: Computing Sciences, Uni of Technology, Sydney.
- Date: 9 Sep 92 00:17:25 GMT
- Lines: 68
-
-
- AE FLOPTICALS:
- --------------
-
- Four of my fellow Kansasfest travelling companions purchased the floptical
- drives offered by Applied Engineering through LRO at the show.
-
- The mechanism is the same as the Tulin drive that Todd mentioned (Insite
- I325VM).
-
- HOWEVER, Richard managed to fry one of the drives and another is currently
- very flaky..... the cause of this is unknown at this stage.
- Possible explanations are: the 240v to 110v step down transformer is doing
- nasty things to the power supply on the drive (They did buy the drives from
- the US afterall).
- OR, these drives may have the "active termination" feature which caused
- Todd to blow his PLI drive up.
- If someone can confirm/deny this last point it would be appreciated.
-
- Richard "SCSI Part, The Snail" Bennett has written a GS/OS SCSI driver for
- these drives. He is currently waiting on Insite to deliver the technical
- doco on the mechanism before he releases it.
-
- Just for your information:
- 1)There are currently 3 known drivers for floptical drives.
- -Tulin sells one with thier drives.
- -There apparently is a shareware driver available on Compuserve.
- -Richard's driver is FREEWARE.
-
- 2)The current floptical drives only use MFM encoding. This means that 800k
- GS disks (GCR encoding) can not be read by these drives.
-
- 3)The AE Floptical drive requires a "mode sense call" before either a "write"
- call or a "format" call.
-
- RamFAST & TAPE DRIVES:
- ----------------------
-
- Todd writes (about RamFAST and Tape drives):
- >1. order the RF programmers docs and write your own tape driver into your
- >program.
-
- Richard has done this and expects to make his tape backup program "The Snail"
- work with the RamFAST. He "may" look into writing a GS/OS SCSI driver for
- tape drives on a RamFAST.
-
- Todd writes (about OS's and peripherals):
- >The tricky part here
- >is that GS/OS supports two types of peripherals: block devices (which are
- >random access) and character devices (which aren't). The RF only provides a
- >block device driver, and to use the tape properly you need a character device
- >driver like Apple's SCSITAPE.
-
- BTW: According to Richard (so don't flame me) tape drives are actually
- block orientated devices. Apple's SCSITAPE is a character device driver only
- because it is more logical to think of a tape drive as a sequential medium.
-
- My feeling on this is that SCSITAPE will work with both character and block
- orientated tape drives (IF character orientated tape drives exist).
-
- Regards,
- Andrew Roughan
-
- --
- Andrew Roughan | Snail: PO Box 65 Wahroonga, NSW 2076 Australia
- Apple // Sub-editor | Net: posty@socs.uts.edu.au
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