Ah yes, you're correct. The Z80 ran the program and the 6502 then handled I/O.
https://en.wikipedia.org/wiki/Tube_%28BBC_Micro%29?wprov=sfla1
On Fri, 21 Oct 2016, 18:40 , <Valdis.Kletnieks@xxxxxx> wrote:
On Fri, 21 Oct 2016 17:04:50 -0000, Laurence Rochfort said:
> The BBC Micro which was 6502 based had an add on that let you connect a Z80
> straight onto the same bus.
If I remember correctly, that one was basically an either/or - you could
boot the 6502, or the Z80, but you couldn't run both at the same time....
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