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SITS tutorial
On a TV keyboard, press ESC (labelled DO IT on the original keyboards). On a teletype or 2500, type ^Z to get the LOGIN: prompt.
If the system doesn't have any users, type enter to bypass login and go to the SYSSPR # prompt. From there you can start DDT or LOGO.
These are the System Sphere commands:
?
CO
CONTINUE
D
DDT
GUN
HELP
KILL
L
LO
LOAD
LOGO
LOGOUT
GOODBYE
ONLINE
PEEK
PERMIT
RS
RSTART
SEND
SYSKILL
SYSSPR
Unlike ITS, the file system is fully hierarchical and names can be any length.
Each disk pack has its own root directory, i.e. 0; for disk 0. Paths consists of names separated by whitespaces. If the root directory is included, it's an absolute path; otherwise it's relative.
To list files, use the DDT command :LISTF. To navigate the file system, use :SETD to set the current directory.
These are the DDT commands:
PUNCH
SYMADD
NEWSPH
LISTF
DELETE
PRINT
YANK
PDUMP
LOAD
BINLOAD
SSTAT
FONT
CAPMODE
MAPMODE
SYSMODE
CLEARSCREEN
REVERSE
ISPACE
?
SETD
LOGOUT
DSPACE
COPY
ERROR
LSI
SITS
Logo can be started by typing 0; . SLOGO.
Useful commands in Logo include CLEARSCREEN to start turtle graphics, and GOODBYE to log out. The 1974 AI memo 313 documents a slightly older version.
There are several different displays available:
- To use a TV display, log in on a TV and type
CS. - To use a vector display, log in on TTY 1 and type
CS. - To use the 2500, log in on the 2500 TV display and type
GTLDIS.
Some of the console data switches have functions:
| Switch | Sensed by | Usage |
|---|---|---|
| 15 | SITS | Go to RUG. |
| 14 | SITS | Page fault breakpoint. |
| 13 | SITS | Stop/start. |
| 3 | SYSSPR | System being debugged. |
| 2 | SYSSPR | Allow SYSKILL. |
| 0 | SITS | Ignore switches. |
Shutting down must be done from TTY 0, and switch 2 must be up.
Get to DDT and type ^Z to go to the SYSSPR command line. Type SYSKILL to shut down. SITS will exit to RUG.