Click Here to visit our Sponsor
The Latest News ! The History of Computing The Magazine Have Fun there ! Buy books and goodies
  Click here to loginLogin Click here to print the pagePrinter ViewClick here to send a link to this page to a friendTell a FriendTell us what you think about this pageRate this PageMistake ? You have mr info ? Click here !Add Info     Search     Click here use the advanced search engine
Browse console museumBrowse pong museum









 

C64 maze generator T-shirts!

see details
Ready prompt T-shirts!

see details
Spiral program T-shirts!

see details
Pixel Deer T-shirts!

see details
BASIC code T-shirts!

see details
Vector ship T-shirts!

see details
Pak Pak Monster T-shirts!

see details
Shooting gallery T-shirts!

see details
Pixel adventure T-shirts!

see details
Breakout T-shirts!

see details





A > ACORN COMPUTER  > Archimedes A4000   


Acorn Computer
Archimedes A4000

The Acorn A4000 was a slightly cheaper cut down A5000, with a shorter case, one expansion slot and an ARM250 processor.

Curiously, the machine had its floppy and hard drive fixed to the chassis with a wire clip which meant these could be quickly replaced without tools, whereas replacing the hard disk on the A5000 was a more fiddly operation requiring the expansion slot plane and the whole chassis holding the drives to be removed.

Many of the features (ARM250, VGA screen modes, RISC OS 3) of this model were implemented into the lower end A3010 and A3020 computers.

The keyboard was a much cheaper type more similar to a generic PC unit.

A rare 486 PC emulator on a card was available, similar cards became popular on the later RISC PC models.

Information supplied by Jonathan Hayward

Special thanks to Darren Mc Moran who donated us this computer !

ShareThis


 

Hi,
My old A4000 is sick, when it is booting there is a message "Internal error: undefined instruction at $03877AC8" does anyone have any clues about this ?? Is it corruption on hard drive or does this indicate hardware problems? or is the old machine on the way to the scrap yard?

          
Tuesday 1st February 2011
Chris (UK)

Hi Jamie,

Thank you for your post! Im pleased to report I got the A4000 up and running and it now has an A3000 to keep it company.

Cheers,

Dean

          
Saturday 27th November 2010
Dean Graham (Selby, UK)
CLANNET

Dean:-

You are probably not going to see this but yes it will work with a VGA monitor. PS2 Keyboard and mouse? I dont know

          
Monday 22nd November 2010
Jamie

 

NAME  Archimedes A4000
MANUFACTURER  Acorn Computer
TYPE  Professional Computer
ORIGIN  United Kingdom
YEAR  september 1992
BUILT IN LANGUAGE  BBC BASIC
KEYBOARD  Full-stroke PC 102 keys style
CPU  ARM 250 32 bit RISC
SPEED  12 MHz
CO-PROCESSOR  MEMC (memory), VIDC (Video and Sound), IOC (I/O)
RAM  2 to 4 MB
ROM  2 MB
TEXT MODES  Up to 132 columns x 32 rows
GRAPHIC MODES  VGA video output. Several graphic modes. Among them 640 x 256 or 512 pixels
COLORS  Palette of 4096 colours
SOUND  8 voices synthesizer
I/O PORTS  Centronics, RS423, VGA, 1 expansion slot (same as A3000, A3010 and A3020)
BUILT IN MEDIA  One 3.5'' FDD, 0 to 210 MB HDD
OS  RISC OS 3.11
POWER SUPPLY  Built-in power supply unit
PRICE  Approx. £800


retro computing t-shirts and goodies
3D Cubes
BASIC code
Breakout
C64 maze generator
Pak Pak Monster
Pixel adventure
Pixel Deer
Ready prompt
Shooting gallery
Spiral program
Vector ship

Related Ebay auctions in real time - click to buy yours







 
Click here to go to the top of the page   
Contact us | members | about old-computers.com | donate old-systems | FAQ
OLD-COMPUTERS.COM is hosted by - NYI (New York Internet) -