Xerox 900 series User Manual

MEMORY
REQUIREMENTS: Approximately 60
S
or 48
10
memory locations.
SUBROUTINES
USED:
MTYIO
COMMENTS: This routine is used by the MONARCH Control Routine to type out or print
control messages obtained from media other than typewriter 1 (on the W
buffer for 900 Seri es Computers, or on Channe I A for 9300 Computers). It is
used by
the MONARCH Control Routine and MONARCH Action Subroutines
(processors) to type or print error messages and to communicate other informa-
tion to the consol e operator. ...__--
IDENTIFICATION: STANDARD ACTION SUBROUTINE FOR SYSTEM ROUTINES (::;SYSP)
PURPOSE:
To provide a standard subroutine for controlling the loading of standard system
routines (e.g., assemblers and compilers) from a MONARCH system tape.
ACTION: The following actions are performed in the order indicated:
1. The MONARCH Loader's symbol table is "purged" so that the only entries
in the symbol table are all the external labels defined within the Loader
itself, which includes the following:
a. Ali external definitions for MONARCH Unit Assignment Table (UAT)
entries and, for 900 Series Computers only, the external definitions
for the Business Assignment Table (BAT).
b. An external definition for the Processor Error Switch (QPESW).
c. An external definition for the entry point to the Monitor Bootstrap
Routine
(QBOOT).
d. An external definition for the entry point to the MONARCH Loader
(QSYLDR).
e. An external definition for the entry point to the octal dump routine
(QDUMP).
2. Selective loading of standard input/output subroutines. The contents of
IORELC (bits 0 through 8) are examined to see if any standard I/O sub-
routines are to be loaded to handle input/output functions for the system
routine. If this is the case, LDIOSR is called to load the indicated I/O
subroutines. Bits 9 through 23 of IORELC provide the load relocation
bias for the first I/O subroutine to be loaded.
3. Locating the standard system routine. The system tape "search
'
! sub-
routine (QSRCH) is coiled with instructions to position the system tape
in the record gop following the level 1 MONARCH ID record for that
5

Xerox 900 series Specifications

General

Brand	Xerox
Model	900 series
Category	Copier
Language	English