> From: Pop <[EMAIL PROTECTED]> > Subject: Re: More Pigs in spaaace... > Amazing! I was thinking like about washing machine sized for 32k... > I dont quite understand how the X and Y wires work. For the 1024x1 core plane, that could be 64 rows, 64 columns. Five decoded bits addressing one-of-64 x, five decoded bits addressing one-of-64 y.. > What speed can it run at? How much heat might the AT motherboard > sized setup give off? By comparison to today's RAM, they were quite slow. It was not unusual for a 2 full AMPERE current jolt to be sent down the "write" wires, perhaps a millisecond long. Heat was not usually a problem - though there always was a hefty wire-wound resistor or two ( as thick as a cigarette ) used for current limiting in the write wires. ..Lots of inductance to overcome in a core plane. B Core RAM was used a little differently than the way we use RAM today; it's most important use was as data RAM, rather than entire programs. I guess it could be used for an automobile controller; these need not be fast at all. In airborne use, the continuously-running program was in ROM, with things like target az and el position, speed, altitude, etc. temporarily stored in core RAM. > Can the sense wires be made of gold? The wires looked like standard enamelled copper magnet wire, the kind found in countless small transformers. - John T. -- Arachne V1.49;beta, NON-COMMERCIAL copy, http://home.arachne.cz/ To unsubscribe from SURVPC send a message to [EMAIL PROTECTED] with unsubscribe SURVPC in the body of the message. Also, trim this footer from any quoted replies.
