I was just looking at this yesterday. Apparently Voyager 1 architecture, ISA, etc are well known but Voyager 2 is still denied via FOIA on grounds of copyright.
This was common back then. The PDP-8 had eight primary instructions, although one of them was multi-purpose. This helped keep the hardware simple when we didn't have ICs.
RISC isn't about having a small ISA but about a regular, orthogonal instruction set.
https://github.com/Zaneham/setun70-emulator
https://science.nasa.gov/mission/voyager/where-are-voyager-1...
RISC isn't about having a small ISA but about a regular, orthogonal instruction set.
I'm not sure I understand the question.