Hexadecimal Field
Displacement Name
o
4
8 10 18 20 28
2C
2E
2F 30 32
34
35
36
38
44 50 58 60 68
6A TAGNEXT DS TAG BLOCK DS TAGINLOC DS TAG LINK DS TAGINTOD DS TAGINVM DS TAGRECNM DS TAGRECLN DS TAGINDEV DS TAGCLASS DS TAGID DS TAGCOPY DS TAGFLAG DS TAGFLAG2 DS TAG NAME TAG TYPE TAGDIST TAGTOLOC TAGTOVM TAG PRIOR TAGDEV DS DS DS DS DS DS DS DS 1F
1F
CL8
CL8
CL8
CL8
1F
1H 1X CL1
1H
1H 1X 1X 1H
CL12
CL12
CL8
CL8
CL8
CL2 2X TAG LEN EQU *-TAGNEXT Field Description, Contents, Meaning Address of next active queue entry
Address of associated I/O area Originating location
Next location for transmission
Time of file origin Originating virtual machine Number of records in file Maximum file data record length
Device code of originating device
File output class
File number at origin location
Number of copies required VM/370 SFELCK centrol flags (SFBFLAG) VM/370 SFELOK control flags (SFEFLAG) Reserved for IBM use
Filename
Filetype
File distritution code
Destination location ID
Destination virtual machine ID
Transmission priority
Active file's virtual device address
Length (in tytes) of the file TAG (X'OD') 264 IBM VM/370 Data Areas and Control Block Logic
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
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