Bill Richman wrote:
>
> Right off, let me say that I know next to nothing about the realities of
> using core memory. I only know that it looks like pretty cool stuff to
> play with. Would I be completely off my tree to try to build a core
> memory interface from scratch, assuming I had a pre-strung core frame with
> all the cores and wires intact? When I say "interface", I mean basically
> something that will let me talk to the core from a PC or from my
> recently-completed Mark-8 using TTL or CMOS levels. If I have a 64x64
> frame, would I just need something on the order of 256 driver transistors
> (one to drive each of the X and Y wires in either direction) plus some
> kind of op-amp or comparator circuit to monitor the sense wire (is there
> just one of these per frame?) and determine whether or not a bit has
> flipped during a read pulse? Or are there all sorts of ghosts and goblins
> lurking in core memory that I don't want to confront?
At one time they made CORE memory driver IC's for driving the lines.
If you can find any of the old guys they would be handy.
--
Ben Franchuk - Dawn * 12/24 bit cpu *
www.jetnet.ab.ca/users/bfranchuk/index.html
Received on Wed Apr 03 2002 - 13:02:56 BST