Core Memory Interfacing?

From: Ben Franchuk <>
Date: Wed Apr 3 16:43:51 2002

Joe wrote:
> Bill,
> You're a man after my own heart! I've been thinking about this for some time. I once had some NICE small core planes (16k I think) out of a HP communications analyzer and I think they would have been just about perfect for this. I had too many other projects at the time so I sold them but I know where there are some more analyzers so I may grab them and swipe the core from them. I found the service manual for the analyzer so I had the pin out for the entire machine including the core. (I still have it). IIRC the core module was about 5 inches square and had all the drivers and sense amps on it so that might make things easier. However there are some things that you have to do with core and I don't know if they handled in hardware or if the OS had to take care of it. For example, reading core is destructive, that is it erases the contents so you have to store the contents back into it before you do anything else (unless you don't care if it's lost). That seems like it wou!
> ld be easy enough to do in HW but I don't know if that's what they did.

Writing back to memory was a hardware function. Clear memory and
Incriment/Decriment memory were often implimented as memory write back

Ben Franchuk - Dawn * 12/24 bit cpu *
Received on Wed Apr 03 2002 - 16:43:51 BST

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