TAGABEA TAGABEA in DMTAXS module contains tag queue pointers and other tag ccntrol informaticn.
It is pointed to by TTAGQ in SVECTOBS. o TAGAFBEE
4 TAGACIN
8 TAGACOUT C TAGAGOT 'IAGAHOLI
Hexadecimal Field
tisplacement Name Field Description, Contents, Meaning ------------ -------------------------------------- 0 TAGAFREE DC A (0) Address of queue of free TAG slots (or
elements)
4 TAGACIN DC A (0) Pointer to queue of active inFut TAGs
8 TAGACOUT DC A (0) Pointer to queue of active cutput TAGs
C TAGAGOT DC H'O' Number free slots left
E TAGAHOLD DC H'O' Number slots to be held
The format of a TAKE request table is: n. V
4
8 Task name of GIVE requestor A(TAKE Request Buffer) A(TAKE Response Buffer)
The TAKE request table corresponds to the GIVE request table. It is built by the task
performing the requested service (via a GIVE request by another task).
Section 3. RSCS Iata Areas and Control Blocks 265

TANKDSEC TANKDSEC is used to reference buffer data and control information ccntained in tanks,
which are unit buffers used to deblock the larger TP buffers. (TP buffers are defined by
the needs of an individual remote station and their size varies from station to station.)
$TANKPOL in mcdule DMTSML points to a queue of available tanks.
r
o 1 TANKCHN
1--------------------------------------------------------
4 I TANKRCB I TANKSRCB TANKCNT
1--------------------------------------------------------
8 I TANKDATA DO Hexadecimal Field
Displacement Name Field Descripticn, Contents, Meaning o
4
5
6
8 DO TANKCHN DC
TANKRCB DC TANKSRCB DS TANKCNT DS TANKDATI DS TANKEND ·DS A (0) 1C
1C
1H CL200 OF Tank chain field
Tank record control byte Tank subrecord control byte
Count of data bytes in tank Data area in tank next to word boundary
266 IBM VM/370 Data Areas and Control Block Logic