Re: AII Memory Expanison card

[Wayne Stewart <waynes@intergate.ca>]

"ground.ecn AppleII Librarian" wrote:
> 
> I am trying to determine the viability of a used AII Memory Expansion card
> (slinky).  It has 8 4256 chips installed in columns 4, 8, 12, 16 in rows A
> and C.  Ie, chips in A4 A8 A12 A16 C4 C8 C12 and C16.  This doesn't seem
> correct and the board is not recogonized in Prodos via in# or pr#,
> although the c400 space is read correctly (slot 4).

They have a wierd way of populating the board but that is correct.
I can email you a scan of that page of the manual which includes a
diagram 
if you wish.

You can try the cards self test
CALL-151 return
Cn0AG return
n is the slot number the card is in

> 
>   1)  What is the chip order for populating the board 256K to 1Mb?
>       Where should I place the first 8 chips?

To go to 512K insert chips in 3,7, 11, 15 in  both to and bottom rows
To go from 512K to 768K insert a set of chips in rows 2, 6, 10, 14 in
both 
top and bottom rows

> 
>   2)  Are the 256K chips on the AII compatible with the chips on a Apple
>       IIGS memory expansion card?  Can I use one board to test chips from
>       the other board?

Yes they are compatible as long as the chips are fast enough for the
IIgs 
card. I could be wrong but I think the IIgs card needed 150ns or faster
while the Apple II card only needed 200ns or faster.

> 
> Thanks for help.  Is there a PDF manual for the board available online?

Not to my knowledge. I have the pertanent parts scanned as jpegs but
it's 
still a few mb. If you want it let me know, I can email it or pop a copy 
in the mail

	Wayne