Voyager 1 FDS Computer Emulator (zaneham.github.io)

92 points by rahen 1mo ago ↗ HN

10 comments

[ 0.26 ms ] story [ 17.3 ms ] thread

rahen 1mo ago ↗

The author has also published a Setun-70 emulator (a Soviet ternary computer rather than a binary one):

https://github.com/Zaneham/setun70-emulator

spicybright 1mo ago ↗

Is it possible to hook this up to some kind of satellite space simulator to control a virtual voyager?

vivzkestrel 1mo ago ↗

- stupid question: what is the program about? what are we trying to achieve?

asah 1mo ago ↗

it would be amazing to include a few example programs!

iberator 1mo ago ↗

Wow. Only 10 instruction set? Looks like father of RISC cpu design

mek6800d2 29d ago ↗

The FDS CPU is very RISCy in nature, but it actually has close to 40 instructions! https://forum.nasaspaceflight.com/index.php?topic=9476.msg26...

And it has been compared to the PDP-8 like rahen suggests, although the Voyager computers are built from medium-scale ICs!

tpoindex 1mo ago ↗

Are the distance and signal delay numbers supposed to be accurate? NASA's page has them substantially different. Nice work, however!

https://science.nasa.gov/mission/voyager/where-are-voyager-1...

bennett_dev 1mo ago ↗

Next add realistic signal delay so you have to wait a day to get the result

brandonpelfrey 1mo ago ↗

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.

mek6800d2 29d ago ↗

Voyager 1 and Voyager 2 are identical, as are their computers. JPL's Voyager documentation is the property of Caltech, not NASA, and are thus not available via FOIA. People have gotten copies of selected documentation by requesting them from libraries that have copies of the original documents on file.