Xerox 900 series - 900 Series RAD MONARCH GENERATOR (SYSGEN)

* II • -1* , SCIENTIPIC DATA SYSTEMS
SDS PROGRAM LIBRARY
PROGRAM DESCRIPTION
Page 1 of Catalog No.
IDENTIFICATION: 900 Series RAD MONARCH GENERATOR (SYSGEN)
CONFIGURATION: Any SDS 900 Series computer with:
PROGRAMMED
OPERATORS:
STORAGE:
TIMING:
USE:
8K or more core memory
magnetic tape unit on W buffer
9367 RAD
consol e typewri ter or line pri nter
None
Requires 767 locations, including constants and a 256-word input buffer
N/A
SYSGEN is a MONARCH system routine, and is called by a 6SYSGEN
message. SYSGE N uses resident I/O hand I ers and overlays MO NARCH,
beginning with LDIOSR, in a manner similar to the UPDATE routine.
The generation of a RAD MONARCH system is accomplished in two steps:
1. The Tape MONARCH system is converted to a RAD MONARCH system by
an UPDATE operation (unnecessary when beginning from a tape - situ-
ated RAD MONARCH system).
2. The resultant NST (New System Tape) is input to a SYSGEN operation
that copies the RAD MONARCH system onto the RAD.
The SYSGE N
operati on is accompl ished by first bootstrapping the RAD
MONARCH tape, and issuing the following control messages:
MS51GN 5 = MTO, Xl = DFuc, 50 = X
6SYSGEN n
This
sequence of messages results in the system being read from magnetic tape 0
on channel A, and being written on RAD unit "u" on channel "C", beginning
with sector O. n is the number of RAD sectors to be allocated to RAD MON-
ARCH and its files. A "directory" of level 1 (61) files is maintained from
sector n downward.