34030Re: [midatlanticretro] Mission accomplished
- Jan 19, 2014Evan;Thanks for the pictures.The unit you are calling control is a mark 75 Signal Data Converter. It was used to convert various analog inputs to digital and digital outputs to analog.Types: of analog signals Synchro, scaled-voltage and Logic (think on-off relay signals)Examples:Synchro:INPUTS1) ships gyroscope: pitch , roll and heading2) Missile Director: train (azimuth) and elevation), target range3 )Missile Launcher: train, and elevation4) wind speed and directionOUTPUTS1)Director train and elevation orders2) launcher position orders3) Missile ordersAnd many othersLooks like a list of the signals and their SDC channels might be still taped to the front (keep that). I used to have little pocket cards with that information.Looks like the only door left on the 1219B’s is the one with nothing behind it. I think that the only reason they were put on was to meet EMI specifications. Some of the guys used to tune a FM radio about mid-band and listen to the “tune” it played when running the diagnostic program.It’s like the pattern if the pitch rollers slapping during the 1540 diagnostic. I can still hear it in my mind.I don’t remember the teletypes on 1532’s leaning like that. I suspect that they took out the front shock mount to make it easier for short people to read.Sometime when you get a chance; check the middle bottom drawer of the 1219’s for a metal box on the right side (control memory). this was a faster than main memory and used for index registers, interrupt vectors and I/O buffer control words. It would occupy 0-377 (octal) in the memory map. I guess if you ever engineer a replacement for the main memory, it would be fast enough that these addresses could be re-mapped to main memory. would need prints for that.TTFNDuane
The UNIVAC is moved. Nobody injured. :)
Details and pictures later...
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