Hi, I assume you are running the PiDP-1 simulator. There is a short cut which mounts a tape when the system starts so all you have to do is push the READ IN switch.
For Spacewar! set Sense Switches to 6 octal (000 110) and start the system.
You can change what programs load by changing the config files in the
/opt/pidp1/bootcfg/ directory. Each switch setting can have a config file.
Octal Sense switch Type Program
1 000 001 Game BLINKY-1_V2_WITH_HELP.rim
2 000 010 Game spacewar48.rim (Spacewar! 48)
3 000 011 Game pong.rim (Pong)
4 000 100 Game icss_1_3.rim (Ironic Space Simulator)
6 000 110 Game spacewar2B_5.rim (Spacewar! 2B)
7 000 111 Game spacewar_dual_screen_4_4g.rim
(dual screen Spacewar!)
10 001 000 Graphics dpys5-demo.rim (Similar to Snowflake)
20 010 000 Graphics minskytron.rim (Minsky Tron)
30 011 000 Graphics snowflake_sa-100.bin (Snowflake)
40 100 000 Graphics munch.rim (Munch)
50 101 000 Graphics mapes.rim (Mapes)
60 110 000 Graphics circle.rim (Circle)
70 111 000 Utilities ribbonIII-bin_12-nov-84.bin (Ribbon)
41 100 001 Utilities et.rim (Expensive typewriter)
42 100 010 Utilities macro.rim (Macro assembler)
43 100 011 Utilities ddt.rim (DEC Debugging Tape)
44 100 100 Language lisp.rim (Lisp programming language)
Cheers AndrewB