On 11/03/2012 04:45 PM, Steven Hirsch wrote:
Very interesting. When I hotrodded my ZIP GSX I installed Cypress CY7C199 12nsec. 32kx8 parts for tag ram (changed sockets out for .3" width). After reading your comment, I swapped in a couple of UMC UM61256K-15s. So far, so good. These have a script "m" in the model number - is that possibly what you meant by "me" - or are some of these actually labeled with "me" (two letters)?
Almost forgot: The data ram on my board is ZMD U62256ADC-07LL 70ns 32kx8 .6" form factor. I'm wondering if that's fast enough.
Are you saying you used the same exact part number for tag and data? I wonder why the boards were equipped with different types for the two functions.
I'd have to do some further surgery to use .3" parts for the data ram. It was hairy enough removing the original tag ram sockets, I'm not anxious to go through this again.
Steve