To run Don Wood's extended version of Colossal Cave Adventure, also known as 'ADVENT', on the SIMH PDP-8 emulator we need two items:

1) the SIMH emulator suite, which includes the DEC PDP-8 emulator, and
2) a bootable RK05 image, which includes the Colossal Cave Adventure game.

Below you will find the instructions that I found in several places on the Internet. The relevant links to the original information will be given as well.


1. Installing the PDP-8 emulator
--------------------------------

Go to https://github.com/simh and download the source code of the latest version of the SIMH emulator suite. Also visit http://simh.trailing-edge.com/ for more information.

Unpack the archive that you downloaded. For example:
$ unzip simh-master.zip

cd into the source tree.
$ cd simh-master

There is a makefile supplied, and we can simply do
$ make pdp8

If all goes well, there should be an executable named "pdp8" in the ./BIN subdirectory.

Alternatively, see if there is a pre-made version of SIMH offered in the repositories of your distro.


2. ADVENT on the PDP-8 emulator
-------------------------------

Following the instructions found on https://raymii.org/s/articles/Running_ADVENT-on-the-PDP-8-with-SIMH.html:

Download the image advent.rk05 using the link http://www.rickmurphy.net/advent/advent.rk05 and place the file in the same location as the pdp-8 executable.

Make a pdp8.ini file containing the following lines:

8< - - - 8< - - - 8< - - - 8< - - - 8< - - - 8< - - - 

set cpu 32K
set cpu idle
attach rk0 advent.rk05
boot rk0
exit

8< - - - 8< - - - 8< - - - 8< - - - 8< - - - 8< - - - 

Now we can start the emulator.

% ./pdp8

To arrive at a "dot" prompt. Continue with

.R FRTS

which gives us a "*" prompt. Now run

*ADVENT.LD

and hit the Escape key on your keyboard. You should now land in the game...

WELCOME TO ADVENTURE!!  WOULD YOU LIKE INSTRUCTIONS?

To leave the game, use the QUIT command, which returns you to the dot prompt. Some interesting information can be found by typing

.TYPE ADVENT.DC

To leave the emulator, use <CTRL>-E.


More information can be found at
https://www.rickmurphy.net/adventure.html
http://www.pdp8online.com/pdp8cgi/os8_html?act=dir;fn=images/os8/diag-games-kermit.rk05;sort=name
https://obsolescence.wixsite.com/obsolescence/pidp-software--documentation