[cctalk] Re: IBM MPX OS info c. 1970

Hi Steve, Yes the IBM 1800 was the industrial version of the 1130 family. I recall meeting someone who had seen in person the 1800 which controlled/sequenced the traffic lights in Manhattan midtown area in NYC through the 1980s or later. So a real time controller. I had not heard of a real time OS for 1130 family, thanks for the info. Hope someone might find a distribution deck for it would be fun to add the instructions to the simulator at ibm1130.org I have a special fondness for those as my very first (in high school) assembler real time interrupt driven code was a standalone punch for the card reader. The A26-2918-3 Functional Characteristics is still a really nice read (available at archive.org). -Robert