There's a book on the computers used at NASA from the beginning through to when it was written - late 80s, I think. Whole thing is available online [1]
It has a chapter titled "Voyager - The Flying Computer Center". [2] It gives a high-level overview of the computers and software. Three different processors, each dual redundant. 18 and 16 bit machines. Comparable to early 1970s minicomputers.
There's a good talk about the computers on the Voyagers available online here. [3]
As far as I know, beyond what's available between those two sources, very little otherwise is available publicly on the computer hardware itself - no detailed architecture descriptions, instruction sets, electronics details, etc. And no software listings. Though if I had to guess the 18-bit machines are a lot like - but not the same as - the OBP/AOP/NSSC series [4].
A bit of Voyager trivia: the computers were reprogrammed in-flight to give new abilities the Voyagers didn't have at launch, such as new image compression algorithms to allow more images to be returned than originally anticipated.
It has a chapter titled "Voyager - The Flying Computer Center". [2] It gives a high-level overview of the computers and software. Three different processors, each dual redundant. 18 and 16 bit machines. Comparable to early 1970s minicomputers.
There's a good talk about the computers on the Voyagers available online here. [3]
As far as I know, beyond what's available between those two sources, very little otherwise is available publicly on the computer hardware itself - no detailed architecture descriptions, instruction sets, electronics details, etc. And no software listings. Though if I had to guess the 18-bit machines are a lot like - but not the same as - the OBP/AOP/NSSC series [4].
A bit of Voyager trivia: the computers were reprogrammed in-flight to give new abilities the Voyagers didn't have at launch, such as new image compression algorithms to allow more images to be returned than originally anticipated.
[1] https://history.nasa.gov/computers/contents.html
[2] https://history.nasa.gov/computers/Ch6-2.html
[3] https://www.youtube.com/watch?v=H62hZJVqs2o
[4] https://en.wikipedia.org/wiki/NSSC-1