Yes. It was a custom macro assembly language developed at JSC. PITA to be honest.
Assembly language is the most efficient programming language to date. I worked on the Modcomp computers (not for NASA) that helped to put the Man on the Moon. It ran mostly assembly compiled code and a good many programs were both Assembly and Fortran.
Yep, those were the days, core memory and washing machine size hardrives with platters the size of a dinner plate.
It could have been worse. Like weaving Code for Apollo ?
Thank You for doing Your part in Our Space Program.
I used to install car alarms years ago. One customer brought me a ‘67 or so Mustang and wanted every add on We had available put on the bottom line Alarm CPU that was on Sale. He wasn’t happy with the way it all worked and after several weeks I finally got Him on the phone with the Manufacturer Tech guy. I’m standing there listening to one side of the conversation and suddenly the Customer says “Well I would have done it this way” and then continues on with “I was a Design Engineer for the Redundancy Systems on the Saturn V Rocket and you should redesign this Alarm CPU”.
I just went back to the shop and removed all of the Alarm System and refunded His money. He said he would make it at home. I said OK.
If I’d known in the beginning I would have never even started the installation. Was a very clean and proper Mustang though.