[Coco] Extended Basic Upgrade Options

[Al Hartman]

One would guess Tandy did this because that kind of masked ROM was 
cheaper, and it made it less likely the average user would pirate a ROM 
rather than taking their Coco to a Computer Center to purchase a real 
one.


-[ Al ]-


On Tue, Apr 07, 2015 at 01:21 PM, Dave Philipsen wrote:

> Yes, but that's only a 32k-bit EPROM which means it's 4K-byte and not 
> large enough for the BASIC ROM in a CoCo.
>
> The problem is that whoever designed the CoCo decided to use the 68764 
> pinout for the ROMs which is different from the defacto industry 
> standard 2764.  Apparently Commodore used this ROM in the C64 as well.
>
> Dave Philipsen