On 2006-01-14 04:18:41 -0400, myemail@fattimi.ei (Andrea) said:
Brian A. Davis <apple2@deleteme.rogers.com> wrote:Which socket was your card connected to?No socket, I received it as a loose spare part... so now the problem is proper connection.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.htmlYes, it looks the same. Mine is missing one rom...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.htmlBookmarked for future reference :) Bye Andrea
The single wire goes on the video connector near the back of the A2 motherboard. There are four pins near the back right of the board. This wire slips on the third pin from the left. These pins are the auxillary video output connector. Some early A2 motherboards also had an auxillary video pin just forward from the auxillary video output connector. This pin could also be used. It was mostly used for connecting Eurapple PAL/SECAM encoder boards.
Of course the RCA connector goes to the monitor cable.This just leaves the ribbon cable. On the German clone boards I have, at location F14, there is a 74LS259 chip. This chip goes on the 80-column card and the ribbon cable plugs into the resulting empty socket on the motherboard. On all of my A2 motherboards there is a 9334 chip. After I did some searching, I found reference that the 9334 is an 8-bit addressable latch. This is the same description as the 74LS259. Apple obviously just used a different part that does the same job. I would place the 9334 on the 80-column card as you would for an 74LS259 chip. Pay attention to the chip orientation for pin 1.
That should do it. Have fun, Brian