Acorn A7000

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Acorn A7000
Developer Acorn Computers
Manufacturer Acorn Computers
Release date 1995 (1995)[1]
Operating system RISC OS
CPU 32 MHz ARM7500
Memory 4–132 MiB RAM
Dimensions 102 mm (4.0 in) (h)
357 mm (14.1 in) (w)
283 mm (11.1 in) (d)
Successor A7000+
Related articles RiscPC
Acorn A7000+
Developer Acorn Computers
Manufacturer Acorn Computers, Castle Technology[2]
Release date 1995 (1995)[3]
Operating system RISC OS
CPU 48–56 MHz ARM7500FE
Memory 8–136 MiB RAM
Dimensions 102 mm (4.0 in) (h)
357 mm (14.1 in) (w)
283 mm (11.1 in) (d)
Successor Phoebe, Iyonix PC, A9home
Related articles RiscPC

The A7000 and A7000+ were Acorn Computers' entry level computers based on the RiscPC architecture. Launched in 1995,[1] they replaced some of the models of the Acorn Archimedes range.[4] After the breakup of Acorn Computers in 1998, Castle Technology bought the rights to continue production of the A7000+.[5] The A7000 used the ARM7500 system on chip which combined the separate ARM CPU, MMU, VIDC20 video chip and IOMD IO controller of the RiscPC into a single chip.[1]

Specifications and technical details[6][7][edit]

  • CPU: A7000, ARM7500 clocked at 32 MHz. A7000+, ARM7500FE, with hardware floating point unit, clocked at 48 MHz or 56 MHz (Castle A7000+).
  • Memory type: 4 MiB FPM (8 MiB EDO A7000+) motherboard mounted and, 1 SIMM slot, supporting a maximum memory size of 132 MiB (136 MiB A7000+).
  • Video subsystem: VIDC20 controller integrated into ARM7500 core, display memory is shared with main memory.
  • Expansion: One Eurocard-sized Podule support in common with Archimedes-series machines. One internal network card socket.
  • Case: One 3.5 inch bay, with floppy drive, one 5.25 inch bay for a CD-ROM. Note, only one of a CD-ROM/DVD-ROM or a Eurocard Podule could be fitted.
  • Ports: RS-232 Serial, Parallel, PS/2 keyboard, PS/2 mouse, headphone audio out, DE15 VGA, network (optional).
  • Dimensions, HxWxD: 102 × 357 × 283 mm
  • Operating System: RISC OS 3.60 (A7000), RISC OS 3.71 (A7000+). RISC OS 4 is available as a replacement for the Acorn-implemented versions which came fitted as standard. Alternatively NetBSD[8] or ARM Linux (historically).[9]


A user modification (dubbed the A7KP) to rehouse an A7000+ as a portable weighing 5 lbs was seen in 2011.[10]


The A7000 was launched in 1995, featuring a 32 MHz ARM7500 processor.[1] The more advanced A7000+ was launched in 1997, featuring a 48 MHz ARM7500FE processor.[3] When Acorn Computers was broken up in 1998 Castle Technology bought the rights to continue A7000+ production.[5]


  1. ^ a b c d Chris's Acorns - Acorn A7000
  2. ^ "Acorn announces distribution deal with Castle Technology for RISC based products". Acorn Computers Ltd (Press release). Acorn Computers Ltd. 1998-10-12. Archived from the original on May 6, 1999. Retrieved 2011-01-06. (October 12th 1998), Cambridge, UK-Acorn announced today that it has completed negotiations with Castle Technology for them to distribute Acorn products. 
  3. ^ a b Chris's Acorns - Acorn A7000+
  4. ^ Enhancements and diversification - Online Media, Risc PC updates and handhelds (1994 to 1996) – Technical history of Acorn of RPC700 and A7000
  5. ^ a b Chris's Acorns - Castle A7000+
  6. ^ Acorn Risc Technologies - A7000 Factsheet
  7. ^ Acorn Clan Newsletter - A7000+
  8. ^ NetBSD acorn/32 project page
  9. ^ ARM Linux - Overview of Acorn Machines
  10. ^ Heater, Brian (June 23, 2011). "The Acorn A7000+ portable mod is what your MacBook looks like in an alternate universe". Engadget. Retrieved February 27, 2012. [Acorn's] late-period A7000+ desktop has now seen a successful second life at the hands of a British modder as the A7KP. The Acorn's innards have been stuffed into a five pound (relatively) portable setup. 

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