On 2012-09-12, at 21:18, Gerrit Heitsch wrote: >> Hmm.. ORing them "waits" for both going LO before selecting the chip. To me it makes some sense, if the _CAS is delayed through PLA propagation, to wait for it so that the timing remains more or less unchanged. > > The object of the OR is not waiting for the falling edge of _CAS but to go inactive at the rising edge of _RAS since that also unlatches the 74HCT573 while _CAS is still low due to the PLA delay. Right, that makes even more sense :-) Especially after explanations from the other message. -- SD! Message was sent through the cbm-hackers mailing listReceived on 2012-09-12 20:00:59
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