[Coco] EPROMS

[Dave Philipsen]

Another reason to use 27256 is that the 27128 EPROMs were not that popular and thus will be harder to find. You should be able to find OTPs for around a buck apiece.  Also, with 27256s you probably won't even find one that's slower than 200ns so pretty much any 27256 will work for you.

Dave

> On Aug 3, 2017, at 8:20 AM, Carlos Camacho <idevgames at gmail.com> wrote:
> 
> The advice on my question of buying modern low-voltage EPROMS to burn
> Extended BASIC for old CoCos was...
> 
> "2764 or 27C64 for the older CoCos (8K) and 27C256 for the CoCo 3 (32K)."
> 
> The 2764 is 8KB right, so that can handle the CoCos that have Color BASIC
> and Extended BASIC in different chips. How about for the CoCos that used a
> single chip which had both Color BASIC and Extended BASIC together?
> Wouldn't that need a 16K EPROM? If so, what is the recommendation?
> 
> Cheers,
> 
> Carlos
> 
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