website/content/museum/acorn-computer-abc-310.md

title, categories, types, origins, years, cpus, params

title	categories	types	origins	years	cpus	params
Acorn Computer ABC 310	Computers	Professional Computer	United Kingdom	1984	PLCC 80286	name company company_name specs tabs photos links comments related oc_id source ABC 310 /companies/acorn-computer Acorn Computer label value NAME ABC 310 label value MANUFACTURER Acorn Computer label value TYPE Professional Computer label value ORIGIN United Kingdom label value YEAR October 1984 label value END OF PRODUCTION 1984, never mass produced label value BUILT IN LANGUAGE BBC Basic?, DR-DOS (Richard Kilpatrick's model appears to have no language) label value KEYBOARD Standard QWERTY, 10 function keys + arrows, plus numeric keypad and Tube switch label value CPU PLCC 80286 label value SPEED Unknown label value CO-PROCESSOR MOS 65C02 (I/O board, essentially a BBC B+) label value RAM 1Mb 286, 64K I/O Board label value VRAM Taken from main RAM, up to 44K? label value ROM 32K, expandable label value TEXT MODES 80 x 32/25 (2 colors) / 40 x 32/25 (2 or 4 colors) / 20 x 32 (16 colors) / 40 x 25 (Teletext display) label value GRAPHIC MODES 640 x 256 (2 colors) / 320 x 256 (4 colors) / 160 x 256 (16 colors) label value COLORS 16 (8 colors + flashing option) label value SOUND 3 channels + noise & envelope control, 7 octaves, optional TMS5220 speech label value SIZE / WEIGHT A little larger than a 17'' monitor! label value I/O PORTS 1MHz BUS, Analogue, RGB, Disk, RS423, Mouse (option), BT Link (option; modem?), User port, Econet, internally SCSI may be available label value BUILT IN MEDIA 10Mb SCSI-MFM HD subsystem, 5.25'' FD label value OS DR-DOS, BBC MOS, GEM-86 label value POWER SUPPLY Built-in PSU, 240V AC - split to monitor power and a switch mode PSU to supply power to the computer and expansion boards. label value PERIPHERALS Most BBC accessories are suitable label value PRICE Unknown photos links title subtitle text image 80286 2ND PROCESSOR BOARD Thanks to Richard Kilpatrick for this picture null title subtitle text image OPENED SYSTEM Thanks to Richard Kilpatrick for this picture null title url text Web Wiz CAPTCHA http://www.webwizcaptcha.com author date text David Wheeldon (United Kingdom) Sunday 7th March 2021 I recently had the opportunity to collect and own and large collection of BBC equipment which included a number of 2nd processors including a working 80286 Issue 0 board also a 30Mb acorn hard drive unit full of master 512 type files and applications author date text Tim Boyd Saturday 3rd July 2010 Acorn came very close to releasing an 80286 Second Processor$ I''ve seen one in the traditional 2P case, complete with correct labelling, which surfaced during one of Acorn''s clear-outs. /museum/acorn-computer-abc-110 /museum/acorn-computer-abc-210-cambridge-workstation 990 url date https://web.archive.org/web/20221203213819/http://www.old-computers.com/museum/computer.asp?c=990 2022-12-03

Acorn's ABC-310 was to be the flagship of the Acorn business computer range. As far as I can tell, the 310 is the rarest variant, and it is the only one to have no direct equivalent available via a 2nd Processor card.

When the ABC range was dissolved, Acorn already had 2nd Processors (a method of adding a new CPU to the BBC, similar to adding a Z80 on a card to an Apple II, but very different in execution and with far more applications) - the 65C02, the Z80, the Acorn Scientific 16032 (1MB RAM, compared to 4MB in the Cambridge Workstation/ABC-210).

However, the 80286 board in the 310 would never surface outside of these prototype machines. Acorn would indulge in Intel-based co-processors later, the 80186 in the BBC Master 512, and various 486/586 based cards for the Archimedes (3rd party, perhaps?) and the RiscPC.

Technically speaking, the 286 had more direct application support, was potentially faster, and was a smaller package than the ageing 16032. It was also more easily obtained. Why it was never released is beyond me - except that the 286 was a very new CPU at the time, and may have been expensive.

Running ABC-310s seem to be very hard to find, and information on them is scarce. They look identical, from the outside, to the ABC-110 and any other of the Cambridge Workstations.

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Text and info by Richard Kilpatrick. Thanks a LOT !

Jules Richardson comments:
I'm told by an ex-Acorn engineer that only a handful of boards were commissioned - but that not all of these were assembled into complete machines. The design and code for the 80286 board fed into the later Master 512 coprocessor.

I'm only aware of two surviving machines - the one pictured here and one other in private hands, although one or two of the coprocessor boards themselves are known to have survived.

I *assume* that it just wasn't cost-effective to market the 310 machines - and that the 80286 board was never released as a separate coprocessor because Acorn wanted to protect their Master 512 interests, and a faster rival board that wasn't internal to the Master would not have helped this.

We need more info about this computer ! If you designed, used, or have more info about this system, please send us pictures or anything you might find useful.