Hi Michau, Looking at your expression for the latch CLK: > 74LS273.CLK = /EXRAM & 74LS273.Q7 > > So as long as we write values to the latch with it 7 set to 0, the latch > still operates. But if we set bit 7 to 1, the latch becomes inactive. In > such case, the RAM will become active, because: As the latch latches (?) on the rising edge and /EXRAM is active low, don't you want a NOR gate here? Rob Message was sent through the cbm-hackers mailing listReceived on 2013-10-22 21:00:09
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