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- Newsgroups: comp.sys.handhelds
- Path: sparky!uunet!pipex!warwick!dcs.warwick.ac.uk!maths.warwick.ac.uk!steve
- From: steve@maths.warwick.ac.uk (Steve Rumsby)
- Subject: Re: Psion 3
- Message-ID: <1992Sep15.103742.11628@dcs.warwick.ac.uk>
- Sender: news@dcs.warwick.ac.uk (Network News)
- Nntp-Posting-Host: avon
- Organization: Geometry Group, Maths Institute, Warwick University, UK.
- Date: Tue, 15 Sep 1992 10:37:42 GMT
- Lines: 69
-
-
- In article <JIL.92Sep14174040@mozart.linus.mitre.org>, jil@linus.mitre.org (Jon Leivent) writes:
- > In article <Ieg_Yb600WB3F_fmQa@andrew.cmu.edu> Greg Howard Rhodes <gr1c+@andrew.cmu.edu> writes:
- >
- > In general, a short review of the Psion 3 would be great.
- >
- > Greg,
- >
- A generally pretty good review follows. I have a couple of corrections
- and some more detail.
-
- > It is a MS-DOS-compatible machine running an 8086 processor.
- >
- Not true. It uses a DOS compatible file system, but the OS is not
- DOS, and it won't run DOS programs.
-
- > This OS is also process-based, so you can have multiple
- > things running simultaneously.
- >
- And they really do all run simultaneously. The background tasks don't
- just get suspended, they carry on running. Real multi-tasking. I had
- a Mandelbrot program running in the background for a while on mine. I
- had to kill it off eventually because the machine got too slow!!
-
- > There are indications that Psion
- > also has a C compiler for it, but I have no info on this (wish I did!).
- >
- They have a C development system that runs on a PC, and presumably
- generated code that you download to the '3 as a pre-compiled OPL
- program. I've never investigated this since I don't own a PC, but
- it would be a nice way of developing code if you do.
-
- > Word-processor files can be converted into and
- > out of RTF format for transfer to and from MS-Word and other WPs.
- >
- There is also a PostScript driver for the WP. The set of fonts it
- knows about is pretty limited (Times, Courier, Helvetica, and Symbol)
- but you probably aren't going to be typing serious documents on it anyway.
-
- > RAM cards range up to
- > 2Meg, so a completely populated Psion can have 4.256Meg available.
- >
- The biggest RAM card is currently 1MB, I think. The biggest flash card
- is 2MB.
-
- > The flash-cards must be bulk-erased, and so cannot be used to extend
- > the OS/application dynamic memory space - they're for files only.
- >
- RAM cards are also for files only. The OS will use only the internal
- 256K of RAM for running applications.
-
- > The machine runs on 2 AA batteries, and a lithium hearing-aid battery
- > for emergency backup. After 2 months of everyday use, I just replaced
- > the AA cells (it tells you when they're getting low). It can also
- > take a 9v external power source. Mine cost me $350.
- >
- The manuals claims 80 hours of continuous use from a set of batteries.
- In practice I seem to get more than that, but I go through phases of
- using it quite heavily and so generally don't get 2 months from a set.
- I've also now switched to Nicads, which don't last anywhere near so
- long.
-
- Steve.
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