To program vectrex using "C" you have to start a new project. To do this, following steps must be taken:
open vedi
start new project
(and also fill in some of the other stuff - never mind the "main asm file")
PeerC
From the templates a "C"-Frame will be copied to the project directory, which is already a runnable "C" program.
Vedi now looks somewhat like:
C-Main