On Monday, November 21, 2016 at 11:56:36 AM UTC-5, gregebert wrote: > > Were these multiplexed, or direct-drive units ? Anyone know what the MUX > ratio was ? I doubt it was 24:1 or 48:1 > > I could pull out one of the boards, but I believe the display board just had drive transistors. The Lectrascan systems came in whatever size was needed for a particular installation, so there was probably some sort of bank addressing for each 48-tube section. Since these date from the mid to late 60's and the design was likely done a year or two before the units appeared, it is almost certainly built out of discrete components. I'm not even sure what they would have used for a character generator, but it could have been a diode matrix. I doubt they used any of the more esoteric storage methods (IBM CROS, Bell Twistor, etc.) but magnetic core (either R/O or R/W) is a possibility. I wonder if the patent applications for the Lectrascan disclose anything about the drive mechanism?
Terry Kennedy https://www.glaver.org -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/3b55eebe-cd42-4de9-8761-b6a702c52d36%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
