What are these old cards?

[brian-usenet2@enchanter.net (Brian Kendig)]

I've got a few Apple II cards, along with a IIe and a II+ which I'm working
on restoring to their original condition.  It's been a very long time since
I've worked with Apple II's; I'd appreciate some help identifying these
cards I've got!

- Three cards marked 'DISK][ INTERFACE CARD', which I know are for the
floppy drives, but they have different part numbers: '650-X104', '650- 104',
and '600-0037'.  All three are copyright 1978.  What's the difference
between these cards?

- One card labeled 'Microsoft Consumer Products SoftCard,' copyright 1981.
I'm presuming this is the BASIC language card?  The IIe doesn't need this,
only the II+ does, right?  There are four dip switches on the card in a
light blue box, and all four are off -- what do these switches do?

- Two identical cards labeled 'ROM CARD' with part number '600-_____-__'
(really!).  They're copyright 1978.  They both have a big red toggle switch
on the end.  What the heck *are* these?

- A card labelled 'Mountain Computer Incorporated', with what looks like a
speaker wire attached, and a socket for two AA batteries on the back.  Could
this be a time/date clock card?

- A single computer chip labeled '341-0036 8049' 'S(c) APPLE 79CHR'.  Any
clue as to what this is for?

- Bonus question: the Apple II+ has some cards in it which have cables which
plug directly into chip sockets on the motherboard; I'm loathe to take these
cards out for fear that I'd never remember how to put them back in
properly.  What cards typically come standard in an Apple II+?

-- 
  ____    |\/|                  Brian Kendig
  \  /\   / ..__.     brian at enchanter net    You are in a maze of twisty
   \/  \__\   _/    http://www.enchanter.net/   little passages, all alike.
    \__   __  \_       Be insatiably curious.
       \____\___\            Ask "why" a lot.