[Coco] 128K/256K EEPROM Cartridge board

[Chad H]

I have the OE# and CE# tied to the cartridge CTS.  This is the same we did for the 2764 and 27128's, etc.

Does this need to changed for writing to the chip?

-----Original Message-----
From: Coco [mailto:coco-bounces at maltedmedia.com] On Behalf Of Tormod Volden
Sent: Sunday, January 25, 2015 4:27 PM
To: CoCoList for Color Computer Enthusiasts
Subject: Re: [Coco] 128K/256K EEPROM Cartridge board

On Sun, Jan 25, 2015 at 11:20 PM, Chad H wrote:
> I had to make separate 'models', one for the PDIP and another for the PLCC as there was insufficient room on the board without making it larger.  The 32-pin PDIP  BARELY FITS!  For those that are interested I just put up animations of the prototype designs on YouTub..
>
> 32-pin PDIP >> http://tinyurl.com/lhpy9xt
>
> 32-pin PLCC >> http://tinyurl.com/m3b7b3d
>
> I added a jumper for "Write Enable" that connects the WE# pin to the Cart R/W pin when jumpered, else it pulls high by pullup resistor (10K I'm figuring).  This of course will be to experiment if we can flash the chips from the CoCo.  If anyone sees a issue here please advise me before I order the first batch!  Thanks!

What about the OE input?

Tormod

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