> Be aware that FRAM wears on reads in addition to writes. And while the
> number of accesses can be quite high, it is finite.

Is there some valid explanation for this ? I have never heard of core
memory being 'worn out' before.

A nice learning PIC project idea imho: build a 16 bit non-volatile memory
using a 16F84 and 16 saturable cores in a 4x4 matrix on portb with a sense
wire on a pin on porta using a single window comparator... Saturable cores
can be made by using steel washers from the hardware store in a pinch <g>.
They should need no more than 3 turns each assuming capacitor discharge
scan pulsing.

On another line, is there anything like hall or mr-read saturable magnetic
material memory in use ? I mean like core memory, but with readout using
mr or hall elements instead of delete pulse sensing like in a proper core
memory.

Peter

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