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- From: jamesb@apple.com (James Blair)
- Newsgroups: comp.sys.mac.hardware,comp.sys.mac.misc,comp.sys.mac.system
- Subject: Re: Powerbook Duos?
- Message-ID: <34101@goofy.apple.COM>
- Date: 23 Dec 92 00:24:47 GMT
- References: <1992Dec1.095449.27880@hellgate.utah.edu> <41914@sdcc12.ucsd.edu> <STEVE.92Dec4080751@elvis.intellection.com> <ibhan.723533393@husc10>
- Sender: usenet@goofy.apple.COM
- Followup-To: comp.sys.mac.hardware
- Organization: Apple Computer, Inc.
- Lines: 28
-
- Subject: Re: Powerbook Duos?
- From: Nick C De Mello, nick+@pitt.edu
- Date: 2 Dec 92 04:51:20 GMT
- In article <10432@blue.cis.pitt.edu.UUCP> Nick C De Mello, nick+@pitt.edu
- writes:
- > The above works with the mini, otherwise you're kind of out of
- >luck. Valid question though, seems like it should be pretty simple
- >to make a cable that fits the PDS and maps the appropriate connections
- >to you desktop's SCSI...
- >
- The PDS connector does not contain any SCSI signals so it is not possible
- to map a cable directly to the PDS connector (let alone the physical
- aspects!)
-
- The MiniDock actually contains a SCSI controller that the SCSI DiskMode
- software talks to when the software is running (thru the MiniDock decoder
- ASIC.)
- SCSI DiskMode software for the Duo transfers bytes between the internal
- SCSI
- bus and the external SCSI buses using the functionality of the 53c80
- internal
- and MiniDock SCSI controllers. If a developer wanted to implement a
- smaller (but SCSI DiskMode capable) version of the MiniDock they would
- have to
- provide some decoding hardware and a ROM that conformed to the Docking
- development specs.
-
- I hope this helps some. James
-