The M8 bus design allows using the most advanced ICs that were available at the time, without regard to brand and fully supports DMA with the 6809 as well.

Note: The board decodes two bus select signals BSEL0 and BSEL1, only BSEL0 is routed to the M8 bus.

The additional decode could be routed to circuits on peripheral cards, using fly wire jumpers, for development purposes.

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