Core memory emulator using non volatile ram.

Jon Elson elson at
Sat Dec 15 14:51:35 CST 2018

On 12/15/2018 02:45 PM, Anders Nelson via cctalk wrote:
> Serial flash has an endurance between 10K-100K writes per cell so I think
> that would break down quickly. Wear-leveling on a serial device would be
> very slow...
If you intend to use it as main core memory on an old CPU, 
it will perform VERY poorly, as these memories need to erase 
a page at a time, and the erase takes milliseconds.  So, 
writing ONE SINGLE word at a time would invoke an erase 
cycle each time, slowing it to 1/1000 or worse the speed of 
the original core memory.  Also, most old CPUs have the 
memory timing built into the CPU, and can't handle a memory 
that says "wait".


More information about the cctech mailing list