On Wednesday 27 October 2004 12:26 pm, Robert A. Rawlinson wrote:
James Knott wrote:
Randall R Schulz wrote:
James,
On Monday 25 October 2004 18:52, James Knott wrote:
...
Take a look at the IMSAI 8080. That was my first computer, which I bought in Nov 1976.
Lucky you! All I could do was read the article in Electronics Illustrated ... Or was it Popular Electronics? Yeah, I think it was Popular Electronics. I was hooked on both of 'em when I was a kid.
<snip>
I built one that was before the altar and imsai. It used the 8008 chip. I had 2k memory and tiny basic. Could still do a lot with it. Other wise it was the same. Bob
Just curious if any of you have every worked with a machine that used core memory. If I remember correctly you basically had a cage of "boards". Each board was an x-y grid of fine wire and around each intersection of the wires was a ring of some ferrous oxide material. A current was applied to a certain x-y coordinate to charge the ring thus representing a binary 1. This was a system that had a destructive read which required you to write back what you just read. I have never used one myself but one of my college instructors had one of these cages of core memory modules from a machine he had used in his youth. Quite interesting. Darrell C.