Frequently Asked Questions regarding my PDP-11 emulator
Q: What OS is this thing running?
It's running UNIX Sixth Edition, a.k.a. V6. Yes, that's the one John Lions commented in his famous book.
cd does not work!
chdir on V6.
Q: Backspace does not work!
You're running a (pseudo-)hardcopy teletypewriter. There ain't no such thing as backspace!
You can use
# to overwrite the last character, e.g.
Hello Wol#rld will be read as
@ works in the same way deleting the whole line, e.g.
Q: WHY IS EVERYTHING IN UPPER CASE?
YOU'RE RUNNING IN COMPATIBILITY MODE WITH UPPER CASE ONLY TERMINALS LIKE THE ASR-33.
STTY -LCASE TO TURN IT OFF.
Q: How do I interrupt programs / kill programs / send EOF?
DEL is the interrupt key (
^C on modern *nix), Pause the quit key (
^L) and PrtScr is EOF (
Q: Your shit is broken, I get all kind of weird traps and stuff.
Don't worry, most of those are part of normal operation, e.g.
trap 000004 occured: read from invalid address 760000 R0 007600 R1 000000 R2 001151 R3 000000 R4 007600 R5 141774 R6 141754 R7 002232 [uK ] instr 002230: 006511 MFPI (R1)
Q: xyz crashes the machine!
See list of known problems. If it's not listed there, feel free to contact me.
Q: Are the man pages available somewhere?
Yes, see cat-v.org.
Q: Can I compile programs?
Yes, see programming.