Re: Apple II+ Mystery Card

[dg04@ns1.cc.lehigh.edu (DAVID GRUMBINE)]

In article <IRIE.93Aug15161658@husc11.harvard.edu>, irie@husc11.harvard.edu (Rob
ert E. Irie) writes:
>In article <4D7a9B2w165w@seanews.akita.com> flodin@seanews.akita.com (Joe Flodi
n) writes:
>
>   There are 7 smaller chips with 14 pins, one slightly larger chip with 20
>   pins, and one large chip with 24 pins.  This last has a sticker on it
>
>It might help if you state what numbers are on the chips.

It would help muchly, but I'd guess they mostly have numbers beginning with
74 or 74LS.  The 20 pin is probably a 74LS244?  Just a guess.

>   New Info; perhaps this is a CP/M card?  I peeled up the sticker on the
>   large chip, and there is this little 1/4 inch glass circle.  I can see
>   into the chip.  And on the chip, I can just barely make out some numbers.
>   My best guess for these numbers are: D271*-7  (the asterisk could be a G
>   or C).  Then, 112D3DC5.  These are the only numbers I can see on the main
>   chip.  If this is a CP/M card, what would I do with it?
>
>does the card have a large chip that says "Z80" on it? if so, its probably
>a cpm card. the chip you mention is an eprom, and the asterisk is probably
>a '6', meaning its a 2K eprom. If this is the largest chip on the board,
>then I doubt it is a cpm card.

That would be a 2716.  I think that 2K is all the ROM space the Apple ][, ][+,
//e gave to cards.  So unless the card had it's own bank-switching hardware,
it wouldn't be able to use more than 2k EPROM.  If it is a CP/M card, it might
also have NEC chips instead of the Z80 mentioned above.  I think mine has
a NEC processor (maybe a V20 or V30?)  These would be large and have 40 pins.
And no little window.  My CP/M card also has an LED on it that lights when the
card is doing something.

What to do with CP/M?  Run Borland Turbo Pascal 3.0 maybe (what I used it
for) or maybe some other Microsoft languages, like C or FORTRAN.  Or
Wordstar.
-- 

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The oppinions expressed above may or may not be my own.  But I'm not telling.

Physics is fun! ....  Honest.
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Dave Grumbine, Jr.       dg04@Lehigh.EDU