Type ASSEMBLE
Source Lines : 1,017
Fixes Applied : 7
Most Recent Version : Tuesday, December 12, 1978
Last Fix ID : [HRC371DS]
Module
DMSINS (INITSUB)
Function
TO CONTROL INITIALIZATION OF THE CMS NUCLEUS.
Attributes
RESIDENT WITH NUCLEUS AT IPL TIME.
Operation
AFTER INITIAL PROGRAM LOAD (IPL) OF THE CMS NUCLEUS,
CONTROL PASSES TO THE ONE-TIME INITIALIZATION PROGRAM
INITSUB, WHICH IMMEDIATELY ESTABLISHES ADDRESSABILITY
AND PROCEEDS AS FOLLOWS:
1. SAVES THE IPL-ED DEVICE ADDRESS.
2. CALLS ADTLKP TO LOCATE THE ACTIVE DISK TABLE FOR
THE SYSTEM DISK.
3. SETS LOW-EXTEND TO X'40000'.
4. CALLS DMSFRES FOR FIRST-PASS STORAGE INITIALIZING.
5. CALLS DMSFREE TO RESERVE ALL NUCLEUS FREE STORAGE
6. CALLS READFST TO READ IN ALL S-DISK FST'S.
7. CALLS DMSFRET TO RETURN ALL NUCLEUS STORAGE
8. CALLS DMSFREE TO GET NUCLEUS FREE STORAGE FOR
SSTAT.
9. CREATES THE SSTAT FROM 'S2' FILES ON S-DISK
10. USES CP-DIAGNOSE TO DETERMINE CHARACTERISTICS
OF A DYNAMIC DISK (IF PRESENT).
11. CHECKS IF THE D-DISK HAS A VALID CMS-LABEL AND
DECIDES IF A FORMAT OR ACCESS IS REQUIRED.
12. CHECKS TO SEE IF A Z-DISK IS REQUIRED.
13. TYPES VERSION IDENTIFICATION MESSAGE.
14. READS THE FIRST COMMAND AND IF IT WAS
'SAVESYS, ISSUES A DIAGNOSE TO CP USING THE
INPUT LINE AS THE PARAMETER LIST. GOTO 10.
15. IF THE FIRST COMMAND WAS ANYTHING ELSE
A. ACCESS THE YDISK (IF PRESENT)
B. Load the GCC runtime library into high HRC371DS
memory and update a pointer in NUCON with HRC371DS
its address. HRC371DS
C. Load REXX into high memory and establish it HRC371DS
as a nucleus command. Now all EXECs can be HRC371DS
written in REXX. HRC371DS
D. Access the user's A disk. HRC371DS
E. Stack a plist LIFO for "PROFILE EXEC" HRC371DS
(if present and if "ACCESS ( NOPROFILE" was HRC371DS
not entered as the first command) HRC371DS
F. Stack a plist LIFO for "SYSPROF EXEC" HRC371DS
(if present and if "ACCESS ( NOPROFILE" was HRC371DS
not entered as the first command) HRC371DS
G. Access the D disk or, if not formatted, HRC371DS
stack a plist LIFO to format the D disk HRC371DS
(if present) HRC371DS
HRC371DS
Thus the command EXEC SYSPROF will be executed HRC371DS
before the PROFILE EXEC is executed. Eventually, HRC371DS
we may first stack a "RELEASE A" command so that HRC371DS
we can ensure that SYSPROF EXEC S is executed... HRC371DS
HRC371DS
16. SETS VALUE OF BLIP TIMER.
17. DETERMINES VIRTUAL MACHINE SIZE AND ALLOCATES
2 PAGES OF LOADER TABLES IF MACHINE SIZE IS
NOT OVER 320K. 3 PAGES ARE OTHERWISE ALLOCATED
But if the machine is 4MB or larger, allocate HRC371DS
64 pages of loader tables. HRC371DS
18. CALLS DMSFRES FOR FINAL STORAGE INITIALIZING
19. GOTO INIT.
Calls to Other Routines
DMSFRES, DMSFREE, DMSFRET, READFST, DMSINT,
DMSDIOR, DMSCAT