You don't need no fancy OpenGL to intepret a VM from the 70's.
You need ncurses for this.
$ git clone https://github.com/daedreth/emu8.git
$ cd em8
$ gcc emu8.c -o emu8 -lncurses
$ ./emu8 <path to rom>
Similarly to the original, use the keys from 1 to 4, QWER for the second row, ASDF for the third and YXCV for the last.
Occasional segfaults for some reason.
If you happen to find an issue, PR.