Cards

Andre' DeHon (andre@ai.mit.edu)
Sat, 3 Aug 91 21:05:46 EDT

I happen to have OEM style literature for Mitsubishi ROM/RAM
memories. Comparing the two leads me to conclude:

-- The ul is not the compatible w/ Mitsubishi 60 pin series cards

-- CD may simply be "card detect" -- the mitsubish cards have a pin
labelled CD which is named "Card Detector" --> Detector for card insertion
or removal. CD is connected to GND for CE type....

The mitsubishi cards also have:

-- a write-protect signal
-- a 3 bit card ID

Does NEC specify the polarity on the CE/WE/OE lines? I would
assume they are negative asserted since almost all memories are that way.

Andre'