[Coco] 28pin AT29c256 in a coco2?

[chris]

OK james thanks.

The pinouts must be the same because I drop an old style 27c256 (286  
ROMs) uv eprom chip in the burner and it reads it fine.

Now here is a wacky idea. If im using bigger flash chips then the  
stock 16K one could I then just flash in cartridge images at the  
expansion port address? I know it would make the real port useless but  
would be cool if I only cared about running a single program. Or is  
the coco's rom socket hardwired in a way that thats not possible?



thanks.
=chris



On Oct 15, 2012, at 9:27 AM, jdaggett at gate.net wrote:

> On 14 Oct 2012 at 22:43, chris wrote:
>
>> The Atmel AT29c256-90PI chips are all over ebay for cheap. Can I use
>> these in a CoCo2 with out doing any hardware hacking?
>
> Be careful of pinouts is about the only thing that I can offer. The  
> 29C256 is a 32Kx8 Flash.
> Once programmed the CPU sees it as a memory and is not particular as  
> to what type it is.
> The speed grade is 90nS so it is far faster than needed on any COCO.
>
> IF the pinouts match what is currently on board then you should have  
> little or no problems.
> The voltage ratings are the same so have at it.
>
> james
>
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