Re: Copy of: Apple //c questions.

[fishern3485@cobra.uni.edu]

> (1)  How can I connect a 20-pin disk drive to the 19-pin connector on the
> back of my //c?

that's a good question.  I've never seen it done, but I bet it's
possible.

> (2)  How can I tell I have a memory-upgradable //c?

they all are.  I have a Super Expander C.  It does not use the
memory plug only present in later versions of the c.  Instead,
you unplug the CPU and MMU (two of the "big three" on the motherboard)
and plug this card into the chip sockets.  Then plug the chips onto
the top of the card.  Nifty setup, but has two problems:

(1) the keyboard barely fits back on top.  You cannot get the
    keyboard back into the case if you have a Zip Chip. (which is
    like 1/8" higher than the 65C02)  My keyboard is currently
    outside the case. (working on a extension cable for the
    keyboard)

(2) if you leave it in for a while, you can no longer remove it.  The
    pins on the card (that plug into the chip sockets) are MUCH larger
    than the pins on the chips, and they pry the prongs apart.  You
    can't get good contact anymore with the chips. (but why would you
    want to remove the memory??)

-- 
Nathan Fisher
  FISHERN3485@COBRA.UNI.EDU