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File:Acorn 1MHz6502CPUC.jpg

Acorn_1MHz6502CPUC.jpg ‎(640 × 420 pixels, file size: 37 KB, MIME type: image/jpeg)

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English: Acorn 1MHZ 6502 CPU card (front).This Acorn 1MHz 6502 CPU card is from a System 4. The part no. is 200,000 Issue 3. The ROMs in IC5/6 are missing as the monitor is not needed and IC7 which can hold an OS ROM is empty. The second INS8154 RAM IO is not installed.The 6502 card is designed for use in the Acorn system 2, 3 and 4 and it plugs into the standard Acorn 8 or 14 slot backplanes. The 6502 microprocessor is run from a 1MHz crystal controlled clock and a TTL device provides address decoding.On the card is 1K of static RAM in 2114's and an 8154 I/O device provides 16 I/O lines, 8 of which connect to an ASCII keyboard via a 20-way ribbon cable connector. Other lines on the 8154 can connect to the cassette interface via the backplane.A second 8154 can be fitted giving a further 16 I/O lines on the 64-way connector and a ROM can be added to carry the Operating System software. (Alternatively this can be on a static RAM card).
Date between circa 2004 and circa 2011
date QS:P,+2050-00-00T00:00:00Z/7,P1319,+2004-00-00T00:00:00Z/9,P1326,+2011-00-00T00:00:00Z/9,P1480,Q5727902
Source Chris's Acorns: Acorn 1MHz 6502 CPU Direct
Author Chris Whytehead
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Chris's Acorns This photograph originates from Chris's Acorns, a collection of material relating to Acorn Computers. The photograph was created between ~2004 and 2011 by Chris Whytehead. Please use the photo while adhering to the license including the attribution to "Chris Whytehead, Chris's Acorns – CC-BY-SA-3.0".

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Information (including text and photos) presented on Chris's Acorns may be reused under the Creative Commons Attribution-Share Alike 3.0 Unported unless otherwise specified. Some information, in particular all the information in the documentation section (e.g. brochures, manuals and books) and the software section (e.g. programs and disc images) remain the copyright of their respective owners and may not be reused without their permission. Images may contain trademarks which remain the property of their respective owners.

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This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.
Attribution: Chris Whytehead, Chris's Acorns – CC-BY-SA-3.0
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Other versions
  • Acorn 1MHZ 6502 CPU card (front)
    Acorn 1MHZ 6502 CPU card (front)
  • Acorn 1MHz 6502 CPU card (back)
    Acorn 1MHz 6502 CPU card (back)
  • Acorn 1MHZ 6502 CPU card (front)
    Acorn 1MHZ 6502 CPU card (front)
  • Acorn 1MHZ 6502 CPU card (front)
    Acorn 1MHZ 6502 CPU card (front)

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current00:34, 23 November 2011Thumbnail for version as of 00:34, 23 November 2011640 × 420 (37 KB)Smallbot (talk | contribs)Commons:Bots/Requests/Smallbot Uploading images from http://acorn.chriswhy.co.uk/8bit_Upgrades/Acorn_1MHz6502CPU.html

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