NAME

unixboot − UNIX startup and boot procedures

DESCRIPTION

How to start UNIX. UNIX is started by placing it in core at location zero and transferring to zero.  Since the system is not reenterable, it is necessary to read it in from disk or tape.  See diskboot(8) or tapeboot(8).

The switches. On systems with console switches, the switches are examined 60 times per second, and the contents of the address specified by the switches are displayed in the display register. If the switch address is even, the address is interpreted in kernel (system) space; if odd, the rounded-down address is interpreted in the current user space.

Init. The operating system invokes init(8) as process number 1. It comes up in state one which is conventionally single-user.

FILES

/unixUNIX code

SEE ALSO

70boot(8), diskboot(8), init(8), romboot(8), tapeboot(8). 

May 16, 1980  —  PDP-11 only