Re: Name the card, please

[Brian A. Davis <apple2@deleteme.rogers.com>]

On 2006-01-13 08:57:06 -0400, myemail@fattimi.ei (Andrea) said:

> Hi, I found this card, I think it comes from a Apple II europlus, can
> anyone tell me what's its use and how to connect it porperly to the
> computer?
> The picture (220K but still all IC data is visible) can be seen here:
>
> <http://myretrocomputing.altervista.org/unk_a2_card.jpg>
>
> Thanks in advance!
>
> Andrea

Hi Andrea;

The card pictured is a clone of the IBS Computertechnik AP16 80-column 
interface. This was a slightly improved version of the Videx card. On 
some A2 clone motherboards, the ribbon cable plugged into the 
motherboard where the 74LS259 chip was located on the right edge. The 
displaced chip plugged into the open socket above the ribbon cable. 
This allowed software control of when the card switched between 40 and 
80 column mode.

I am not sure where the ribbon cable plugged into on a real Apple II. 
Which socket was your card connected to?

You can see a photo of the IBS card in my A2 Expansion Card photo gallery.

http://apple2.cometdust.ca/a2_cards/pages/page_77.html

The pages in my gallery get renamed when I add card photos, so the 
above link will eventually point to another card. It's best to just 
start at the index page and scan through.

http://apple2.cometdust.ca/a2_cards/index.html

When the photo was taken, I did not have the ribbon cable attached. It 
was still in my Space 84 A2 clone. You can see that the 74LS259 chip is 
filling the empty socket.

Cheers,

Brian
---
Brian A. Davis
http://apple2.cometdust.ca/