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68000 co-pro for BBC micro http://anycpu.org/forum/viewtopic.php?f=17&t=177 |
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Author: | BigEd [ Sun Dec 21, 2014 8:09 am ] |
Post subject: | 68000 co-pro for BBC micro |
This might be of interest: a thread about bringup of a 68000 co-processor for a BBC micro. The co-pro will be a standalone SBC, with CPU, RAM and boot ROM, and an 8-bit port to the host machine from where it receives filesystem and i/o services. The relevant files seem to have been archived. Looks like there were at least two 68000 copros at the time: a Torch one and this Caspar one. See http://stardot.org.uk/forums/viewtopic.php?f=3&t=2920 Seems the Torch board ran a Unix. See http://chrisacorns.computinghistory.org ... 68000.html The thing about Acorn's Tube interface is that physically it's just a small area of the host's (6502) address space. So any 8-bit hardware can be placed on the other end - it need not be Acorn's own Tube chip. If it's not the Tube chip, then some hardware specific support code will be needed on the host side, either as a ROM or loaded from disk. |
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