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Old 18th Dec 2018, 1:17 am   #136
Slothie
Octode
 
Join Date: Apr 2018
Location: Newbury, Berkshire, UK.
Posts: 1,287
Default Re: MK14 schematic revisions

I spent a lot of time thinking about that because memory size is one of the biggest limitations of the MK14, especially if you go to the trouble of adding the VDU, and to do it I'd have to either remove support for 6561 memories or add another 74 series chip (which I suppose wouldn't be too bad if I could squeeze it in unobtrusively).

Since the 2111/ AM9111 memory availability is patchy I'd rather not drop 6251 support as it gives more options. The 2111 compatible memories are one of the hardest part to get if you don't want to pay £30+ each from a broker.

Unfortunately there aren't really any other memory alternatives, other than the MK14.5 approach of using something like a 6116 and logic to recreate the memory map...
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