M H Stein wrote:
> ----------
> From: 	Jim Brain[SMTP:brain@jbrain.com]
> Sent: 	Sunday, May 03, 2009 7:01 PM
>
> <snip>
> So, for the DIY crowd, it seems worthwhile to offer a 2364 to JEDEC-std 
> adapter board with a header and a socket, at a nominal price.
> <snip>
>
> Any chance you could also put the two rows of pins for a 6540 replacement
> on there while you're at it, to use either a 2732 or 1/2 of a 2764?
>
> I've still got 68764/66s, but I could sure use something to plug into the old 
> 2001 ROM sockets if it were cheaper than what's out there now.
>
> mike
>
>
>        Message was sent through the cbm-hackers mailing list
>   
If I understood the IC, I'd be willing.  Notes:

* I have a pinout, but...
* This forum post by ghaytack: 
(http://forum.6502.org/viewtopic.php?p=4167&sid=d3417a3a329da7056c839997285c1686) 
notes that the CS lines could be ether active high or active low, 
depending on application.  Is that true?
* This adapter (available on eBay) makes it appear that the CS[3-5] are 
active low, while CS[1-2] are active high.
* I can;t find any documentation or datasheet that tells how O2 figures 
into the equation.
* Nicholas Welte has an adapter that might be what you need 
(http://freenet-homepage.de/x1541/hardware/adaptors.html), but the 
schematic does not appear to do anything with the CS lines.

Jim






-- 
Jim Brain, Brain Innovations                                      (X)
brain@jbrain.com 
Dabbling in WWW, Embedded Systems, Old CBM computers, and Good Times! 
Home: http://www.jbrain.com


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