[Coco] On John Linnville's Color Computer Game Master Cartridge Design

[RETRO Innovations]

On 8/2/2017 11:02 PM, Darren A wrote:
> On Wed, Aug 2, 2017 at 9:13 PM, RETRO Innovations <go4retro at go4retro.com>
> wrote:
>
>> BTW, has the cart been tested as Coco3 1.7MHz?  I ask because it looks
>> like a !CE pulse smaller than 375nS will not trigger the operation, and the
>> E high period at 1.79MHz is 279nS, I think (if my late night math holds).
>>
>
> Are you sure about that?  The datasheet shows max time from *CE to READY as
> 150ns, with a typical time of 90ns.
>
>
> - Darren
>
I agree.  Empirical evidence here shows otherwise, but it could be the 
IC I have (I have found a few duds in the set I bought, or I ruined them 
while testing options).  I will test some more, just thought I would 
check to make sure it works.

Jim


-- 
RETRO Innovations, Contemporary Gear for Classic Systems
www.go4retro.com
store.go4retro.com