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Torch 68000 second processor by Lee Davison
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The Torch 68000 second processor.

This is a second processor board for the BBC Micro. This board is incomplete and while I can guess some of the components I am missing the ROM and one or two other chips I can't identify.

Apart from the board itself I have no information on this board and I would like at least to complete the board and get the circuit diagram for it. So, if you have further information, or know where such can be found, please e-mail me [e-mail].

A couple of larger image versions.

  • A 640 x 480 jpeg image.
  • A 1024 x 768 jpeg image.

    Found out that IC10 is a PROM so here's what's inside as both binary and hex.

  • Download the PROM as a Motorola S record file.
  • Download the PROM as a binary dump.

    • The Torch Atlas 68000/Z80 second processor.

    This is another version of the 68000 second processor board for the BBC Micro. This board appears to be a later version of the board above and is also is incomplete. While I can guess that the components missing are the 68000, RAM and ROM I don't know what was in the ROMs.

    I would like at least to complete the board and get the circuit diagram for it. So, if you have further information, or know where such can be found, please e-mail me [e-mail].

    Here are some larger image versions.

  • A 640 x 480 jpeg image.
  • A 1024 x 768 jpeg image.
  • A 1200 x 900 jpeg image.

    ICs 4, 24 and 35 are PAL16L8 and IC25 is a PAL16R8 so here's what's inside them as jdec files.

  • Download the IC04 as a jdec file.
  • Download the IC24 as a jdec file.
  • Download the IC25 as a jdec file.
  • Download the IC35 as a jdec file.
    • e-mail me [e-mail]
    Last page update: 4th May, 2002.