SVECTORS Eexadecimal Field
tisplacement Name
21C 220 224
228
22C 230 234
238
23C 240 244
248
24C 250 254
258
25C 260 264
268
26C 270 274
278
27C 280 284
288
28C QUEUE DS QUEUEND DS FREEQ DS TASKQ DS MPXIOQ DS SELIOQ DS IOEXITQ DS EXTQ DS ALERTQ DS GIVEQ DS QREQ DS DISPATCH DS WAITREQ DS POSTREQ DS IOREQ DS TASKREQ DS MAINREQ DS SYNREQ DS ALERTREQ DS GIVEREQ DS TAKEREQ DS TVECTORO DS TVECTORl DS TVECTOR2 DS TVECTOR3 DS TVECTOR4 DS TVECTOR5 DS TVECTOR6 DS TVECTOR7 DS v (SQUEUE) V (SQUEUEND) A (0) A (0) A (0) A (0) A (0) A (0) A (0) A (0) V (DMTQRQ) V (DMTDSP) V (DMTWAT) V (DMTPST) V (DMTIOMRQ) V (DMTASK) V (DMTSTO) V (DMTASY) A (DMTSIG) V (DMTGIV) V (DMTAKE)
A (0) A (0) A (0) A (0) A (0) A (0) A (0) A (0) TLINKS TROUTE TPORTS TTAGQ TCOM EQU TVECTORO EQU TVECTORl EQU TVECTOR2 EQU TVECTOR3 EQU TVECTOR4 Field Description, Contents, Address of start of sUFervisor queue
Address of end of last supervisor queue
element
Address of start of
Address of start of
Address of start of
Address of start of
Address of start of
element queue
free element queue task element queue
multiplexer I/O queue
selectcr I/O queue
asynchronous I/O request
Address of start of external request element
queue
Address of start of task asynchronous request
element queue
Address of start of GIVE request element
queue
Supervisor queue allocation request entry
address
Task dispatcher entry address Wait request entry address Post request entry address I/O request entry address
Task management request entry address Main allocation request entry address
Asynchronous interrupt request entry address
Task asynchronous signal request) A (ALERT) entry address
Task request GIVE request entry address
Task request TAKE request entry address
Task defined field
Task defined field
Task defined field
Task defined field
Task defined field
Task defined field
Task defined field
Task defined field
Link table address
Reserved for IBM use Svitchable port table address
Tag slot queue
Common routine chain
262 IBM VM/370 Data Areas and Control Block Logic

TAG TAG describes a file enqueued fer processing by RSCS. The data in this area is built
from the TAG record associated with a file via the CP tag command and from the CP speel
file hlock (SFB) that describes the file.
o TAG NEXT 4 TAGELOCK 8 TAGINLOC C 10 TAGLINK i4 18 TAGINTOD 1C 20 TAGINVM 24
28 TAGRECNl! 2C TAGRECLN T1GINI:EV T1GCL1SS 30 TAGID TAGCOPY 34 TAGFLAG TAGFLAG2 till/IIII/RESERVED//III//ii/// 38 TAG NAME 3C 40 44 TAGTYPE 48 4C 50 TAGDIST
54
58 TAGTOLOC 5C 60 TAGTOVM 64
68 TAG PRIOR TAGDEV Section 3. RSCS Iata Areas and Control Blocks 263