3 ms·

Wow, how long did it take to Port Unix to run under VMS?

• Taniwha 7y ago
  It was a long time ago, probably ~ 6 months part time - bringing up the kernel at the same time as a compiler is never easy - it ran in supervisor/user modes in place of VMS's shell. Porting V6 was harder, it was very pdp-11ish, lots of stuff (especially context switch) depended a lot on knowledge of the structure pdp11 stack frames