[Coco] 128K EEPROM Cartridge board

[Chad H]

Wouldn't that be awesome?  I suspected that when I was reading the data sheet on how there are no separate WRITE/ERASE modes.  It does the ERASE transparently to the user during the WRITE operation.  Not how I would go into WRITE mode via software though.. Might have to look at the jumper stuff more on that.

Sent from my Transformer Infinity

-------- Original Message --------
From: "Mark J. Blair" <nf6x at nf6x.net>
Sent: Sunday, January 25, 2015 10:57 AM
To: CoCoList Computer Enthusiasts <coco at maltedmedia.com>
Subject: Re: [Coco] 128K EEPROM Cartridge board


> On Jan 25, 2015, at 08:28, Chad H <chadbh74 at hotmail.com> wrote:
> I have the idea of revamping the 2764-27512 EPROM boards I've been building, removing the existing DIP layouts and adding the option to mount either the DIP or PLCC version of the 29EE010.  I would also need to add one additional jumper for the A16 address line.  This would give more capacity for roms , each selectable by jumpers...

These EEPROMs should also be writable in place in the CoCo, without needing any external programmer at all, if I'm not mistaken! I'd include a jumper and pull-up resistor on the write enable line in order to write-protect the memory.


--
Mark J. Blair, NF6X <nf6x at nf6x.net>
http://www.nf6x.net/


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