Am 12. Juni 2018 5:05:42 PM schrieb Mia Magnusson <mia@plea.se>: > Den Sun, 10 Jun 2018 14:33:41 +0200 skrev Gerrit Heitsch > <gerrit@laosinh.s.bawue.de>: >> On 06/10/2018 01:59 PM, Michał Pleban > 6821's are even cheaper. Not sure if they would fit, but worth > investigating. > > Btw it could also be made using simple 74xx logic. Two 8-bit latches > with output enable could each latch written data from one CPU and gate > the outputs on read by the other CPU. Add the few extra parts needed to > handshake e.t.c. (maybe a 74**74 dual d-flip-flop could act as a kind > of interrupt controller, each half in each direction). Wow that reminds me..... http://www.6502.org/users/andre/csa/copro/index.html Shared control port with optmistic locking :-) AndréReceived on 2018-06-12 20:03:35
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