Re: "Primos, was based upon Honeywell's development of Multics for super-minis."
Prime's first OS was called RTOS, for Real-Time Operating System. It was written by Prime's founder, Bill Poduska, who wrote the first assembler for Multics. DOS came next, and then later, DOS was used as the bootloder for PRIMOS. Beginning with Revision 17 of PRIMOS, most of the OS was re-written in a subset of PL/I, and the Primos Analyst Training Class notes included pages photocopied from the Multics Systems Programmers Manual.
RTOS is lost to time. I have the DOS source code, the source code for PRIMOS Rev 18.1 and Rev 19.2. As Bill Poduska himself described, it's "Multics in a Matchbox".
Biting the hand that feeds IT
