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PDP-10 Archives
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BB-BT99T-BB_1990
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10,7/galaxy/nebula/nebprm.mac
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UNIVERSAL NEBPRM - GALAXY-10 Network Queue Controller parameter file
SUBTTL D. P. Mastrovito & Joseph A. Dziedzic /DPM/JAD
;
;
; COPYRIGHT (c) DIGITAL EQUIPMENT CORPORATION
; 1986,1987.
; ALL RIGHTS RESERVED.
;
;
; THIS SOFTWARE IS FURNISHED UNDER A LICENSE AND MAY BE USED
; AND COPIED ONLY IN ACCORDANCE WITH THE TERMS OF SUCH LICENSE
; AND WITH THE INCLUSION OF THE ABOVE COPYRIGHT NOTICE. THIS
; SOFTWARE OR ANY OTHER COPIES THEREOF MAY NOT BE PROVIDED OR
; OTHERWISE MADE AVAILABLE TO ANY OTHER PERSON. NO TITLE TO
; AND OWNERSHIP OF THE SOFTWARE IS HEREBY TRANSFERRED.
;
; THE INFORMATION IN THIS SOFTWARE IS SUBJECT TO CHANGE
; WITHOUT NOTICE AND SHOULD NOT BE CONSTRUED AS A COMMITMENT
; BY DIGITAL EQUIPMENT CORPORATION.
;
; DIGITAL ASSUMES NO RESPONSIBILITY FOR THE USE OR RELIABILITY
; OF ITS SOFTWARE ON EQUIPMENT WHICH IS NOT SUPPLIED BY
; DIGITAL.
NEBVER==1 ;MAJOR VERSION
NEBMIN==0 ;MINOR VERSION
NEBWHO==0 ;WHO LAST PATCHED
NEBEDT==22 ;EDIT LEVEL
SUBTTL Revision history
COMMENT \
1 Conception.
17-Jun-86 GCO 10418 /DPM/JAD
2 Add revision history, zero relative file number when starting to
process remote create, accept remote queue name from QUEUE when
doing a remote queue list.
18-Jun-86 GCO 10422 /JAD
3 Fix bug in NEBDCN which prevents us from releasing stale channels
after we're done with them.
27-Jun-86 GCO 10427 /JAD
4 Fix lower case conversion of /CHARACTERISTICS
27-Jun-86 GCO 10428 /TL
5 Implement an output "fairness counter" which prevents a transfer
request stream from running "forever" if it never gets blocked
due to flow control, filling all available buffers, etc.
30-Jun-86 GCO 10430 /JAD
6 Check ITN rather than object block on a QUASAR ABORT message.
30-Jun-86 GCO 10431 /JAD
7 Handle remote DJM indigestion and either cancel or requeue the
job depending on the error level.
10-Jul-86 GCO 10436 /JAD
10 Move characteristics/forms handling routines into a module
called "CHRFRM" so it can be loaded by QUASAR to check the
arguments on a CREATE and clunk the user then.
10-Jul-86 GCO 10438 /JAD
11 Add run log stuff. Since DQS isn't smart enough to do pretty
things with the "error text" blocks, make the run log look
like just another file transfered.
24-Jul-86 GCO 10452 /DPM
12 GETITM croaks when presented with a length of zero. Handle
zero "transparently" and return a zero to the caller.
30-Nov-86 GCO 10472 /JAD
13 Fix error in LLST.7 which clobbers error text pointer.
5-Jan-86 GCO 10483 /JAD
14 If QUASAR slips and sends a NEXTJOB msg and we have no free
streams, send a REQUEUE msg instead of forgetting we saw
the msg. Hopefully this may fix QUASAR RUJ crashes. Also
change $STOPs to STOPCDs.
1-Jul-87 GCO 10519 /LWS
15 Add SETU.1 + some, isolate stream number from AOBJN pointer
before determining stream type.
17-Jul-87 GCO 10535 /LWS
16 Teach NEBULA to return attributes in "response to setup"
message. In NXTJOB, if call to SELDRV fails, send "response
to setup" msg to QUASAR with %RSUNA (not available) code so
QUASAR will "ignore" the stream for a while.
26-Jul-87 GCO 10547 /LWS
17 Add rudimentary support for the DQS corporate standard.
10-Aug-87 GCO 10552 /KDO
20 Add FTFBST and FTFTRL to control file burst pages and file
trailer pages (respectively).
18-Aug-87 GCO 10555 /KDO
21 Make ABORT work. Implement STOP/CONTINUE and REQUEUE.
20-Jul-89 GCO 10673 /DPM
22 Do not default a characteristic if none specified by the user.
This can cause problems when queueing to a remote queue which is
a generic VMS queue.
18-Apr-90 GCO 10687 /LWS
\; END OF COMMENT
SUBTTL Module initialization macro
;MACRO TO INITIALIZE A MODULE
DEFINE MODULE (NAM),<
XLIST ;;SUPPRESS LISTING
SALL ;;FOR CLEAN LISTINGS
.DIREC FLBLST ;;FOR CLEANER LISTINGS
SEARCH JOBDAT ;;TOPS-10 JOB DATA SYMBOLS
SEARCH GLXMAC ;;GENERAL GALAXY SYMBOLS
SEARCH QSRMAC ;;QUASAR SYMBOLS
SEARCH ORNMAC ;;OPERATOR SYMBOLS
IFIDN <NAM><NEBPRM>,< ;;SPECIAL CHECK FOR PARAMETER MODULE
SEARCH UUOSYM ;;NEED TOPS-10 SYMBOLS
>
IFDIF <NAM><NEBPRM>,< ;;SPECIAL CHECK FOR OTHER MODULES
PROLOG ('NAM) ;;KEEP GLXLIB HAPPY
GLOB <G$PGM,G$NAM> ;;FOR $TEXT
>
RELOC 0 ;;START LOADING HERE
LIST ;;TURN ON LISTING
%%.NEB==:<VRSN.(NEB)> ;;ASSEMBLE VERSION NUMBER
> ;END MODULE MACRO
MODULE (NEBPRM)
SUBTTL Assembly parameters
ND PRCN,^D20 ;MAXIMUM NUMBER OF PROCESSING STREAMS
ND LSTN,^D10 ;MAXIMUM NUMBER OF LISTING STREAMS
ND PDLMSZ,^D200 ;PDL SIZE FOR MAIN TOP LEVEL SCHEDULER
ND PDLSSZ,^D200 ;PDL SIZE FOR STREAM
ND GLBPSV,^D4 ;NUMBER OF SPARE GLOBAL PSI VECTORS
ND JOBPSV,^D2 ;NUMBER OF PSI VECTORS PER STREAM
ND ZZTIME,0 ;WAKE ONLY ON INTERRUPTS
ND UPDTIM,^D60*3 ;NUMBER OF SECONDS BETWEEN STATUS UPDATES
ND REQTIM,^D5 ;NUMBER OF MINUTES TO REQUEUE JOBS
ND OUTFCT,^D2 ;MAXIMUM NUMBER OF CONCURRENT OUTPUT BUFFERS
; FILLED BEFORE DESCHEDULING A STREAM
ND BFSBYT,^D512 ;BUFFER SIZE IN BYTES
XP BFSWRD,<<BFSBYT+3>/4> ;BUFFER SIZE IN WORDS
ND RLGBSZ,^D200 ;RUN LOG BUFFER SIZE
ND OLDDQS,^D170 ;OLD DQS OBJECT NUMBER (ZERO IF NONE)
SUBTTL Feature test switches
ND FTFBST,0 ;REQUEST FILE BURST PAGES
ND FTFTRL,0 ;REQUEST FILE TRAILER PAGES
SUBTTL Parameters not easily changed
JOBN==PRCN+LSTN ;TOTAL NUMBER OF STREAMS
TIMLVL==0 ;TIMER INTERRUPT PRIORITY LEVEL
;ACCUMULATOR DEFINITIONS
S==14 ;STATUS FLAGS
R==15 ;STREAM RELOCATION
M==16 ;IPCF MESSAGE
SUBTTL I/O dispatch vector definitions
IOLNK==1 ;LINKED LIST FOR I/O VECTORS
.ORG 0
.IOLNK:! BLOCK 1 ;LINK TO NEXT VECTOR
.IOABV:! BLOCK 1 ;SIXBIT ABBREVIATION
.IONAM:! BLOCK 1 ;DRIVER NAME
.IONTY:! BLOCK 1 ;NETWORK TYPE CODE
.IOINI:! BLOCK 1 ;INITIALIZE
.IOINF:! BLOCK 1 ;RETURN INFORMATION ABOUT NODE
.IOOPN:! BLOCK 1 ;OPEN
.IOCLS:! BLOCK 1 ;CLOSE
.IOINP:! BLOCK 1 ;BUFFER INPUT
.IOOUT:! BLOCK 1 ;BUFFER OUTPUT
.IOABO:! BLOCK 1 ;ABORT LINK
.IOSIA:! BLOCK 1 ;SKIP IF INPUT AVAILABLE
.IOUUE:! BLOCK 1 ;UUO TRANSLATION TABLE
.IOLEN::! ;LENGTH OF BLOCK
.ORG
;MACRO TO GENERATE VECTOR
DEFINE IOVEC (ABV,NAM),<
ABV:: XWD 0,0 ;;LINK TO NEXT DISPATCH DEVTOR
.LINK IOLNK,'ABV
SIXBIT / 'ABV/ ;;SIXBIT ABBREVIATION
IFIW [ASCIZ |'NAM|] ;;NAME
XWD 0,ST.'ABV ;;NETWORK TYPE CODE
IFIW ABV'INI ;;INITIALIZE
IFIW ABV'INF ;;RETURN INFORMATION ABOUT NODE
IFIW ABV'OPN ;;OPEN
IFIW ABV'CLS ;;CLOSE
IFIW ABV'INP ;;BUFFER INPUT
IFIW ABV'OUT ;;BUFFER OUTPUT
IFIW ABV'ABO ;;ABORT LINK
IFIW ABV'SIA ;;SKIP IF INPUT AVAILABLE
IFIW ABV'UUE ;;UUO ERROR TRANSLATION TABLE
> ;END IOVEC MACRO
SUBTTL UUO error translation
;MACRO TO GENERATE A TABLE OF OPCODES AND TRANSLATION TABLE POINTERS
DEFINE UUO (OPC,LEN,TAB),<
OPC 0,0 ;;OPCODE
SIXBIT /OPC/ ;;OPCODE NAME
XWD -LEN,TAB ;;TRANSLATION TABEL
> ;END DEFINE UUO
SUBTTL Job data base
.ORG 0
;QUASAR DATA
;*** THE EQ PAGE MUST BE FIRST ***
.JQEQP:! BLOCK PAGSIZ ;EQ PAGE
;*** OTHER DATA FOLLOWS IN ANY ORDER ***
.JQOBJ:! BLOCK OBJ.SZ ;OBJECT BLOCK
.JQCHK:! BLOCK 1 ;JOB CHECKPOINT FLAG
.JQCRQ:! BLOCK EQCKSZ ;CHECKPOINT/REQUEUE INFORMATION
.JQRQF:! BLOCK 1 ;REQUEUE FLAGS
.JQTRS:! BLOCK 1 ;TIME REQUEST STARTED PROCESSING
.JQLUT:! BLOCK 1 ;LAST STATUS UPDATE TIME
.JQRFN:! BLOCK 1 ;RELATIVE FILE NUMBER BEING PROCESSED
.JQCFD:! BLOCK 1 ;ADDRESS OF CURRENT FD BEING PROCESSED
.JQBYT:! BLOCK 1 ;NUMBER OF BYTES TRANSFERRED
;JOB DATA
.JBWSC:! BLOCK 1 ;WAIT STATE CODE
.JBFLG:! BLOCK 1 ;JOB FLAGS
JB.INP==1B0 ;INPUT STREAM
JB.SPR==1B1 ;RUN TIMER QUEUED SUBROUTINE IN SCHEDULER
JB.KIL==1B2 ;KILL JOB
JB.ABO==1B3 ;ABORT LINK IN PROGRESS
JB.RLE==1B4 ;RUN LOG ERROR
JB.OLD==1B5 ;OLD VERSION OF DQS
JB.PAU==1B6 ;STREAM PAUSED (BY OPR)
JB.REQ==1B7 ;REQUEUE IN PROGRESS
JB.HLD==1B8 ;SET HOLD, NO SLEEP TIME ON REQUEUE
.JBACS:! BLOCK 20 ;JOB PROCESSOR ACS
.JBPDL:! BLOCK PDLSSZ ;JOB PROCESSOR PDL
.JBIDN:! BLOCK 21 ;IDENTIFYING TEXT
.JBTIM:! BLOCK 1 ;TIMER IN SECONDS
.JBTQS:! BLOCK 1 ;TIMER QUEUED SUBROUTINE ADDRESS
.JBNOD:! BLOCK 1 ;REMOTE NODE NAME/NUMBER
.JBPSI:! BLOCK 1 ;PSI VECTOR BLOCK ADDRESS
.JBPSR:! BLOCK 3 ;PSI INTERRUPT TO HERE
.JBFCT:! BLOCK 1 ;FAIRNESS COUNTER
.JBRSN:! BLOCK STSSIZ ;REASON TEXT ON CANCELS OR ABORTS
;NETWORK I/O DATA
.JNIOV:! BLOCK .IOLEN ;NETWORK I/O DISPATCH VECTOR
.JNIOC:! BLOCK 1 ;NETWORK CHANNEL FOR I/O
.JNIOS:! BLOCK 1 ;I/O STATUS
.JNARG:! BLOCK .NSAMX ;NSP. UUO ARGUMENT BLOCK
;FILE STUFF
.JFFOB:! BLOCK FOB.SZ ;FILE OPEN BLOCK
.JFIFN:! BLOCK 1 ;IFN OF CURRENT FILE
;I/O DATA AND BUFFERS
.JIIBR:! ;INPUT BUFFER RING HEADER
.JIIBA:! BLOCK 1 ;INPUT BUFFER ADDRESS
.JIIBP:! BLOCK 1 ;INPUT BUFFER BYTE POINTER
.JIIBC:! BLOCK 1 ;INPUT BUFFER BYTE COUNT
.JIIBF:! BLOCK BFSWRD ;INPUT BUFFER
.JIOBR:! ;OUTPUT BUFFER RING HEADER
.JIOBA:! BLOCK 1 ;OUTPUT BUFFER ADDRESS
.JIOBP:! BLOCK 1 ;OUTPUT BUFFER BYTE POINTER
.JIOBC:! BLOCK 1 ;OUTPUT BUFFER BYTE COUNT
.JIOBF:! BLOCK BFSWRD ;OUTPUT BUFFER
;LISTING ROUTINE VARIABLES
.JLPID:! BLOCK 1 ;PID OF LIST REQUEST ORIGINATOR
.JLCOD:! BLOCK 1 ;ACK CODE FOR MESSAGE ORIGINATOR
.JLTYP:! BLOCK 1 ;REQUEST TYPE (0 = USER, -1 = OPR)
.JLQNM:! BLOCK QNMLEN ;QUEUE NAME TO LIST (ZERO IF ALL)
.JLPAG:! BLOCK 1 ;ADDRESS OF LISTING PAGE
.JLMPT:! BLOCK 1 ;ZERO IF QUEUE EMPTY
.JLNJL:! BLOCK 1 ;NUMBER OF JOBS LISTED
.JLNAJ:! BLOCK 1 ;NUMBER OF ACTIVE JOBS LISTED
.JLNRM:! BLOCK 1 ;NO ROOM LEFT IN OUTPUT PAGE FLAG
.JLCRF:! BLOCK 1 ;LAST OUTPUT WAS CRLF FLAG
.JLBPT:! BLOCK 1 ;BYTE POINTER INTO OUTPUT PAGE
.JLBCT:! BLOCK 1 ;BYTE COUNT REMAINING IN OUTPUT PAGE
.JLDAA:! BLOCK 1 ;ADDRESS OF DATA AREA IN OUTPUT PAGE
;RUN LOG DATA
.JRLNK:! BLOCK 1 ;LINKED LIST HANDLE
.JRPTR:! BLOCK 1 ;BYTE POINTER TO STORAGE
.JRCNT:! BLOCK 1 ;BYTE COUNT
.JWRDS:! ;LENGTH OF DATA BASE IN WORDS
.JPAGS==1+<<.JWRDS-1>/PAGSIZ> ;LENGTH OF DATA BASE IN PAGES
.ORG
SUBTTL Job states
;*** NOTE ***
;WAIT STATE 'RUN' MUST BE FIRST IN LIST
DEFINE WSTATE,<
X RUN,<Running>
X WCC,<Waiting for connect confirm>
X WRC,<Waiting for remote connect>
X WDC,<Waiting for disconnect confirm>
X OUT,<Output data request queued>
X INP,<Input data request queued>
X IDL,<Idle>
X PAU,<Stopped by the operator>
> ;END DEFINE WSTATE
ZZ==-1
DEFINE X (NAM,TXT),<.WS'NAM==<ZZ==ZZ+1>>
WSTATE
PURGE ZZ
SUBTTL Job control macros
;MACRO TO RESCHEDULE A STREAM
;ARGUMENTS: WSC = OPTIONAL WAIT STATE CODE
; TIM = OPTIONAL TIME IN SECONDS
;
;IF COD = -1, WAIT STATE WILL NOT BE SET
;IF TIM = -1, TIMER WILL NOT BE SET
DEFINE SCDSET (COD,TIM),<
GLOB <SSCHED>
PUSHJ P,SSCHED
<300>B8+<COD&777>B17+<TIM&777777>B35
> ;END DEFINE SCDSET
SUBTTL Listing Control Macros
DEFINE $ASCII(MSG),<
PUSHJ P,ASCOUI ;;CALL IN-LINE ASCII TEXT PROCESSOR
CAI [ASCIZ |MSG|] ;;ADDRESS OF THE TEXT
>; END DEFINE $ASCII
SUBTTL Byte pointer macros
;MACRO TO CREATE A BYTE POINTER TO A BYTE IN A MESSAGE.
;ARGUMENTS: OFS - BYTE OFFSET INTO MESSAGE
; ADR - ADDRESS OF MESSAGE
DEFINE BYTPNT (OFS,ADR),<
$$$WRD==OFS/4 ;;WORD OFFSET
$$$POS==<<<OFS&3>+1>*8>-1 ;;POSITION OF RIGHT-MOST BIT
POINT 8,$$$WRD+ADR,$$$POS
>; END DEFINE BYTPNT
SUBTTL DJS Protocol Definitions
RADIX 5+5
;Message types
.MTCRE==2 ;CREATE
.MTPAR==3 ;PARAMETER
.MTFSP==4 ;FILE SPEC
.MTFDT==5 ;FILE DATA
.MTEOF==6 ;END OF FILE
.MTEOR==7 ;END OF REQUEST
.MTCOM==8 ;COMMIT
.MTWIT==9 ;WITHDRAW
.MTCAN==10 ;CANCEL
.MTDIS==11 ;DISPLAY
.MTMOD==12 ;MODIFY
.MTSUM==13 ;SUMMARY
.MTERR==15 ;ERROR
.MTEND==16 ;END
;Block types for the ENVIRONMENT message (not used)
; .BTPVN==1 ;PROTOCOL VERSION
; .BTBFS==3 ;BUFFER SIZE
; .BTSUP==4 ;SUPPORTED FEATURES
; .BTOST==5 ;OPERATING SYSTEM TYPE
;Block types for the CREATE, MODIFY, CANCEL, DISPLAY, and SUMMARY
;messages - note that each message does not necessarily support
;all of the block types listed
.BTJNB==1 ;JOB NUMBER
.BTJNA==3 ;JOB NAME
.BTJOW==4 ;JOB OWNER
.BTQUE==5 ;QUEUE NAME
.BTJBS==6 ;JOB STATE
.BTRJN==9 ;REQUESTOR JOB NUMBER
.BTTXT==10 ;TEXT
.BTJCT==11 ;JOB COUNT
.BTPGL==12 ;PAGE LIMIT
.BTPRI==13 ;PRIORITY
.BTAFT==14 ;AFTER TIME
.BTNOA==16 ;NOTIFY ACTION
.BTPVN==18 ;PROTOCOL VERSION NUMBER
.BTACT==19 ;ACCOUNT NAME
.BTJID==20 ;JOBID LIST
.BTCAS==21 ;CASE TYPE
.BTFRM==22 ;FORMS TYPE
.BTCHR==23 ;CHARACTERISTICS
.LNCHR==^D16 ;LENGTH OF CHARACTERISTICS BYTE STRING
.BTAJB==24 ;ALL JOBS
.BTNON==29 ;NOTIFY NAME
.BTFNT==30 ;FONT NAME
.BTP01==31 ;PARAMETER 1
.BTP02==32 ;PARAMETER 2
.BTP03==33 ;PARAMETER 3
.BTP04==34 ;PARAMETER 4
.BTP05==35 ;PARAMETER 5
.BTP06==36 ;PARAMETER 6
.BTP07==37 ;PARAMETER 7
.BTP08==38 ;PARAMETER 8
.BTNOT==39 ;NOTE
.BTTMQ==40 ;TIME QUEUED
;Block types for the FILE SPEC message
.BTFNM==6 ;FILE NAME
.BTFTY==8 ;FILE DATA TYPE
.BTFCC==11 ;COPIES
.BTFSE==12 ;SEPARATOR
SE.HDR==1 ;FILE HEADERS
SE.BST==4 ;FILE BURST PAGES
SE.TRL==8 ;FILE TRAILERS
.BTFEP==14 ;END PAGE
.BTFBL==15 ;BLANK LINES
.BTFPO==17 ;PAGE OPTION
PO.PAG==1 ;PAGINATE
PO.LFS==2 ;LISTFILESPEC (NOT SUPPORTED)
.BTFOR==18 ;FAB ORG
.BTFAT==19 ;FAB RAT
.BTFRS==20 ;FAB MRS
.BTFRN==21 ;FAB MRN
.BTFFM==22 ;FAB RFM
.BTFSZ==23 ;FAB FSZ
.BTFBK==24 ;FAB BKS
.BTFGB==25 ;FAB GBC
.BTFOP==26 ;FAB FOP
.BTFAL==27 ;FAB ALQ
.BTFSP==28 ;START PAGE
.BTFST==29 ;FILE SETUP
;Block types for the FILE DATA message
.BTDAT==1 ;DATA TRANSFER
;Block types for the ERROR message
.BTEEL==1 ;ERROR LEVEL
.BTEEC==2 ;ERROR CLASS
.BTECD==3 ;ERROR CODE
.BTEID==7 ;MESSAGE ID
.BTETX==10 ;TEXT
;Status values
.STHDJ==1 ;HOLD WAITING FOR COMMIT
.STHUS==2 ;HOLD BY USER
.STHOP==3 ;HOLD BY OPERATOR
.STHTI==4 ;HOLD UNTIL DESIGNATED TIME
.STHFT==5 ;HOLD WAITING FOR FILE TRANSFER
.STHRW==6 ;HOLD WAITING FOR RESOURCES
.STSCH==7 ;SCHEDULED FOR EXECUTION
.STEXC==8 ;EXECUTION IN PROGRESS
.STSUS==9 ;EXECUTION SUSPENDED BY USER
.STSOP==10 ;EXECUTION SUSPENDED BY OPERATOR
.STSRQ==11 ;EXECUTION SUSPENDED BY JOB REQUEST
.STSRW==12 ;EXECUTION SUSPENDED BY RESOURCE WAIT
.STCUS==13 ;JOB CANCELLED BY USER
.STCOP==14 ;JOB CANCELLED BY OPERATOR
.STCMK==15 ;JOB MARKED FOR CANCELLATION
.STSUC==16 ;JOB COMPLETED (TERMINATED NORMALLY)
.STFAI==17 ;JOB COMPLETED (TERMINATED ABNORMALLY)
;Case types
.CTANY==1 ;ANY
.CTLOW==2 ;LOWER
.CTUPR==3 ;UPPER
.CTLQP==4 ;LQP
;Notify action bits
NA.CMP==1 ;NOTIFY ON COMPLETION
NA.CHG==2 ;NOTIFY ON CHANGE
NA.TSK==4 ;NOTIFY TASK
;Error levels
.ELFAT==4 ;FATAL
.ELWRN==3 ;WARNING
.ELINF==2 ;INFORMATIONAL
.ELSUC==1 ;SUCCESS
;Error classes
.ECRMT==4 ;REMOTE
.ECDJS==3 ;DJS
.ECUNS==2 ;UNSUPPORTED
.ECPRT==1 ;PROTOCOL ERROR
RADIX 4+4
SUBTTL Definitions of bytes in message header and block
;The first "n" bytes in the DQS message are the message header.
;The contents of these bytes and their names are:
.HDTYP==0 ;MESSAGE TYPE (.MTxxx)
.HDFLG==1 ;FLAGS (NONE DEFINED?)
.HDCTX==2 ;SENDER'S CONTEXT
.HDBLK==3 ;NUMBER OF BLOCKS IN BODY OF MESSAGE
.HDLNL==4 ;LOW ORDER BYTE OF MESSAGE LENGTH
.HDLNH==5 ;HIGH ORDER BYTE OF MESSAGE LENGTH
.HDSIZ==6 ;SIZE OF MESSAGE HEADER
;The first "n" bytes in a DQS message block are the block header.
;The contents of these bytes and their names are:
.BKTYP==0 ;BLOCK TYPE (.BTxxx)
.BKLNH==1 ;HIGH ORDER BYTE OF BLOCK LENGTH
.BKLNL==2 ;LOW ORDER BYTE OF BLOCK LENGTH
.BKSIZ==3 ;SIZE OF BLOCK HEADER
END