LIRKTABL
LINKTABL describes the status of a single link in the RSCS network; collectively, all the
links defined for the system are referred to as the link tatle. An a-byte header precedes the first entry in the link table (that is, the first link
defined by the LINKTABL DSECT). The TLINKS field in SVECTORS points to this header,
which has the following format: o 4
total links max ilium links
6
current
links
total links is the total number of links defined for an RSCS installation via the GENLINK macro during system generation. (For information cn the GENLINK macro, see the maximum links is the maximum number of concurrently active links allowable.
current links is the number of links active in RSCS at a given time. I o 1 LINKID I 4 1 1------------------------------------------------------
8 I LDEFTNME 1------------------------------------------------------ C 1 10 LDEFDRVR 14
18 LACTDRVR 1C 20 LDEFLINE LACTLINE 24 LDRVRVAR 28 LDEFCLS1 LDEFCLS2 LDEFCLS3 LDEFCLS4 2C LACTCLS1 LACTCLS2 LACTCLS3 LACTCLS4 30 LTIMEZON LFLAG LRESERVD 34 LPENDING LTAKEN
38 LPOINTER 3C LMSGQ 40 LTRNSCNT LERRCNT 44 LTOCNT LSPARE 48 LNKCLOCK 4C 256 IBM VM/370 Data Areas and Control Block Logic

Hexadecimal Field
Displacement Name o
8 C 10 18 20 22
24
28
29
2A
2B 2C 2D
2E
2F 30 31
32
34
36
38 3C 40 42
44
46
48 LIN KID DS LDEFTNME DS LACTTN!'lE DS LDEFDRVR DS LACTDRVR DS LDEFLINE DS LACTLINE DS LDRVRVAR DS LDEFCLSl DS LDEFCLS2 DS LDEFCLS3 DS LDEFCLS4 DS LACTCLSl DS LACTCLS2 DS LACTCLS3 DS LACTCLS4 DS LTIMEZON DS LFLAG DS 1}it§ LACTIVE EQU LALERT EQU LHOLD EQU LDRAIN EQU LTRALL BQU LTRBRR BQU LHALT EQU CL8
CL4 CL4 CLa
CL8 2X 2X 1F CLl CL1 CLl CLl CLl CLl CL1 eLi 1X 1X in LFLAG -x '80'--- X'40' X'20' X'10' X'08' X'04' 1'01' LINKLEN BQU *-LINKTABL LRBSBRVD DS 1H LPENDING DS 1H
LTAKEN DS 1H LPOINTER DS 1F LMSGQ DS 1F LTRNSCNT DS 1H
LERRCNT DS 1H LTOCNT DS 1H LSPARE DS 1H LNKCLOCK DS 8X Field Description, Contents, EECtlC link identification
Default task name Active task name
Default driver identification
Active driver identificaticn
Default virtual line address
Active virtual line address
Line driver variable information Default spool file Class 1
Default spool file Class 2
Default spool file Class 3
Default spool file Class 4
Active spool file Class 1
Active spool file Class 2 Active spool file Class 3 Active spool file Class 4 LINKTAEL
Displacement of two complete time zones from
Greenwich Mean Tille Link flag byte Link active AXS ALERT exit set
Link hold set
Link drain in progress
Link transaction tracing (all)
Link transaction tracing (error)
Link to be forced inactive
Length of link table entry Count of tag elements reserved Count of unaccepted tags Count of tag slots in use
Address of start of the TAG queue for this RSCS link MSG queue pointer
Link transaction count
Error count
Timeout count Spare half word Clock comparator value for this link Section 3. RSCS tata Areas and Control Blocks 257