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- Newsgroups: comp.sys.acorn
- Path: sparky!uunet!pipex!warwick!pavo.csi.cam.ac.uk!rjh21
- From: rjh21@cl.cam.ac.uk (Richard Hayton)
- Subject: [Summary]: A5000 .v. A540
- Message-ID: <1992Nov13.133517.25038@infodev.cam.ac.uk>
- Keywords: A540,Comparison
- Sender: news@infodev.cam.ac.uk (USENET news)
- Nntp-Posting-Host: ampton.cl.cam.ac.uk
- Organization: U of Cambridge Computer Lab, UK
- Date: Fri, 13 Nov 1992 13:35:17 GMT
- Lines: 124
-
-
-
- A5000 .v. A540
- ==============
-
- Many thanks to the following for replying. If I've missed you out, I appologise
- My mail system crashed a few days ago and I lost some messages:
-
- crj10@uk.ac.cam.phx
- mhardy@uk.co.acorn (Michael Hardy)
- C.D.Latham@uk.ac.ex.cen
- rsxdp@uk.ac.nott.unicorn (D.Pead)
- idg10@uk.ac.cam.phx
-
- Here are the combined sets of differences between the two machines:
-
- Hard Disc
- =========
-
- A5000: 80/120Mb IDE (can add 1 more on same controller)
- A540: 120Mb SCSI (can add 7 more on same controller)
-
- Roms
- ====
- A5000: Risc-OS 3.
- A540: Risc-OS 2 but will take the roms with no carrier board
-
- Podule Slots
- ============
- A540: 4 but one filled with SCSI controller
- A5000: 4
-
- crj10 adds:
- Firstly, it is in theory possible to put more than four podules in an
- A540, because the Chips&Technologies integrated controller doesn't
- occupy the bit of memory map which could otherwise accomodate up to
- twelve more podules. (Fanout and bus length are still issues, and
- nobody's ever actually made such an upgrade for the A540, though!)
-
- Serial Port
- ===========
- A5000: new
- A540 old (like A310)
-
- Parallel Port
- =============
- A5000: new bi-directional
- A540 old (like A310)
-
- Processor
- =========
- crj10:
- The A540 has a separate processor card, which could be later
- upgraded. Note that the VIDC20 will be with us in a year or two,
- and that uses a 64-bit data bus. It will be easier to change the video
- memory architecture on the A540, and it's basically the only machine
- in the range which could possibly be adapted to take the VIDC20.
- [Nobody suggests acorn will actually do this though...]
-
-
- Speed
- =====
- A540: (very) marignally faster than A5000
-
- Both use same processor and ram. However M.J.Hardy (from acorn) adds
-
- 'The ARM3 chips in the A540 are specially selected, and I believe are usually
- clocked faster than those on the A5000.'
-
- Monitor
- =======
- A5000: Can drive all but hi-rez mono. Comes with Multisync
- A540: Can drive all. Comes with out monitor.
-
- crj10:
- you might need a non-standard lead to attach some monitors (mono with BNC
- sync/signal pair, for example) to the A5000.
-
- Unix
- ====
- A540: Suported
- A5000: not (drivers hard!)
-
- Floppy
- ======
- A5000: new 2Mb
- A540: old 1MB would require a new controller to have a new drive (possibly
- using up an expansion slot).
-
-
- Memory
- ======
- A540: Offically upgrabable to 16MB an no dodgy 'cheeses'
- A5000: Unofficially upgradable to 8MB
-
- me:
- I've spend a lot of time fixing 8MB memory upgrades. In a lab environment
- these simply don't last. This is not the quality of the upgrades but the
- fact that they connect via a chip socket.
-
-
- Case
- ====
- A540: Old style (however more sturdy than A300/A400)
- A5000: New style
-
- Power Supply
- ============
-
- C.D.Latham:
- The A540 has got a stronger power supply I believe.
-
- Me:
- Note, the A540 has a much better power supply than in the A300/A400
- series (Complete with 2 internal fans). I don't know how it compares
- with the A5000.
-
-
- -------------------
-
- Right that's the lot. I still haven't decided, I'm waiting until I've sold
- my existing machine.
-
- Rich.
-