Re: Another mystery card (to me at least)

[Robert Flossmann <rfka01@gmx.de>]

Brian,
thanks, though Bill Garber might like it as the card is going to him.

Robert

In article <ef95678d.0408242114.6e1be540@posting.google.com>, brian-
list-member@rogers.com says...
> Robert Flossmann <rfka01@gmx.de> wrote in message news:<MPG.1b9561f6a3d28e9a989680@news.individual.de>...
> > Hi all,
> > I got one obscure apple II card off modern day's dump heap (ebay):
> > 
> > The link to the picture is is: 
> > http://www.speedsurf.to/bertl/mystery.html
> > 
> > The bigger ICs (of which two are missing) have the number: hm6116LP.3
> > 
> > Do you know this card? What do the DIP switches select? Do I have to add 
> > the two missing chips before using the card?
> > 
> > Thanks Robert
> 
> 
> Hi Robert;
> 
> The card you have is a 16k EPROM/CMOS memory expansion card. It was 
> manufactured by IBS Computertechnik in 1984. The catalog product number 
> was AP8.
> 
> The card can use the CMOS memory chips that are installed on your card, 
> or EPROM chips for user programs. The three batteries allowed the CMOS 
> to be used as permanent (as long as the charge lasted) storage.
> 
> The 16k is in parallel to the ROM and I/O area and is overlayable with 
> the use of bank select softswitches. The address space is divided into 
> four areas that can be individually selected. There is also an autostart 
> function so you could boot from the card on power up.
> 
> I think I have the schematic for the card in my A2 archives. If you 
> would like, I can check.
> 
> Cheers,
> 
> Brian
> 
> <badavis@no.spam.rogers.com>
>