SITS tutorial

Logging in

On a TV keyboard, press ESC. 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.

System Sphere

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

File System

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.

DDT

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
*:LOGOUT
BYE

Switches

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

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.