12 replies to this topic

[candle]

Hi!

Could someone sum up RAM-SLOT 3 expansion modules for Atari 400/800?
I know there is some kind of graphics card (80 column text-only display i belive), but there might be others i don't know about
It essencial for my work on new personality board, and since i'm finnishing with routing of the later one, it would be nice to have it served rather than digged out

Sebastian

[rdea6]

http://www.atariage....ost__p__1891934

Austin Franklin 80 column card info is on the thread.

[candle]

Thanks Roy
I've found Austin-Franklin 80 colum card, Bit-3 equivalet, and some memory cards
thats all i found
what i need is any information if above two can work with slots 1 & 2 unpopulated (some daisychaining involved)

[rdea6]

The orignator of this thread should be able to help you out. ' ClausB '

http://www.atariage....ost__p__2220617

Edited by rdea6, Sat Jan 28, 2012 7:18 PM.

[ClausB]

candle, on Sat Jan 28, 2012 6:03 PM, said:

what i need is any information if above two can work with slots 1 & 2 unpopulated (some daisychaining involved)

I very much doubt that that the 80-column cards used the "daisy-chain" RAM select signals on slot 3, because most 32K cards (especially the Axlon) for slot 2 did not pass a RAM select signal to slot 3.

[Rybags]

I think candle wants to know if any configs work with only a card in slot 3.

Given the way the RAM expansion works, I'd probably think not since the passthru signals won't be present.

[candle]

exacly

[ClausB]

AFAIK, no RAM card will work alone in slot 3 without loopbacks or jumpers.

I think an 80-column card in slot 3 will work without RAM cards in slots 1 and 2 because I don't think it uses the RAM select signals. I think an 80 column card uses the I/O page select signals -Y5 and -Y6, and possibly -EXSEL. But I am not absolutely sure, because I don't have one.

[candle]

from what Warerat wrote in Austin-Franklin 80 column card thread it seems so (Y5,Y6 and possibly EXTSEL for character rom)

[sup8pdct]

I do recall in an early antic, an add for some storage soulation (i think) replaced the whole top. what and how is unknown. any one remember it?

james

[David_P]

I recall reading an article by David Small where he mentionned a disk system he sold that connected through the OS board - could that be what you're remembering?

[BillC]

David_P, on Sun Jan 29, 2012 10:01 PM, said:

I recall reading an article by David Small where he mentionned a disk system he sold that connected through the OS board - could that be what you're remembering?

I believe you are referring to the ADS Integrater board, mentioned in the thread below.

http://www.atariage....ost__p__2281268

[sup8pdct]

no. It was a box that sat on top replacing the lid. No one has said any thing about it so am assuming it is rare.

James