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Old 05 April 2017, 10:44   #125
plasmab
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Quote:
Originally Posted by majsta View Post
You have 2-wire or 3-wire bus arbitration used there. You don't need to use 3-wire bus arbitration at all, so BGACK is not needed. If you remove CPU there is no need to do bus arbitration at all so no need to implement those signals.
Erm... you do need bus arbitration. You can plug a CPU into the A500 sidecar socket. This is exactly what I am talking about. You effectively have a zorro slot on the A500 that can become a bus master by itself. You also need bus arb if you want this to work on any Atari hardware because they all use the bus arb for DMA cycles.
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