[2 'Interface and Timing M7706 cards in an RK07] > The existence of two separate wire list pages in the schematic, and a > quick look at the M7706 diagram output signals suggests that this would > *not* work - that the output lines of the two M7706 cards are wired > together on a single-port drive and driven by ordinary TTL, and that a > dual-port drive had different wiring on the backplane, even though the > card cages are the same and the backplane itself is the same.
I am pretty sure you're rignt, this won't work and may damage the M7706 boards due to TTL outputs being linked together. A quick look at the printset shows that the multiplexers to select between the 2 M7706 boards in a dual ported drive are on the dual port logic PCB, -tony
