Re: FLASH ROM replacement

Re: FLASH ROM replacement

From: Jim Brain <>
Date: Tue, 05 May 2009 12:00:09 -0500
Message-ID: <>
M H Stein wrote:
> ----------
> From: 	Jim Brain[]
> 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: 
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 
(, but the 
schematic does not appear to do anything with the CS lines.


Jim Brain, Brain Innovations                                      (X) 
Dabbling in WWW, Embedded Systems, Old CBM computers, and Good Times! 

       Message was sent through the cbm-hackers mailing list
Received on 2009-05-05 19:18:25

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