OSFST Hexadeciaal Field
Displacement Name Field Description, Contents, Meaning ------------ --------------------------------------
19 OSFSTEND DS 51 Current extent end
1E OSFSTDSN DS 44C Data set name
4A OSFSTITN DS 1701 Data extents description
Bits defined in OSFSTXTN OSFSTEXii-EQU --OSFSTXTN+30 Location of fourth extent froll DSCB3
F4 OSFSTDSK DS 1H tisk address (Ocuu) F6 OSFSTTYP DS 1H Disk device type (see OSADT fer type flags)
Fa OSFSTNTE DS 51 Used to save CCEHR for NeT! macro
FD DS 3X Reserved for IBM use 100 OSFSTTRK DS 1F No. of tracks per cylinder 104 DS 2F Reserved for IBM use 10C OSFSTMEM DS CL8 Partitioned data set mellber name
114 DS IF Reserved for IBf! u.se 118 DS OD OSFSTLTH EQO (*-OSFST) /8 OS FS'! length in doul:lewords (X'35') Section 2. CMS Iata Areas and Centrcl Blocks 223

OVSECT, PCTAB OVSECT is used by Ilodule DMSOVS to provide trace information requested by SVCTRACE. 0 8 Eexadecillal Displacement
------------ 0 4
8 C r r---------------------------------------------------------, I OVSGO AERR I I -----------------------------------------------------1 I Pield Name OVSGO B
AERR DC AWAIT DC LENOVS DC AWAIT
*-*
A (0) A {OJ A (0) LENOVS I Field Description, Ccntents, Meaning Eranch to this point for TRICE lddress of fMSERR lddress of CONWAIT Length of DMSOVS doutlevords PCTAE is used by DOS/VS routines in the event of a progra. check. The address of PCTIE is in bytes X'64' andX'65' of the partition coaaunication region (BGCCI!). o PCROUT PCSIVE Eexadecimal Pield Displacement Naae Field Description, Contents, Meaning ------------ -------------------------------------- PCTIB EQU *-8 Progra. check option table
a PCROUT DC P'O' PCROUT a when no STIlT .acro vas issued
address of user prograa check
routine (indicat ing that the STIlT macro vas issued)
co.ple.ent of the address of the
user progra. check rcutine
(indicating that specified routine
in the user STIlT aacro vas
already in use)
4 PCSIVE DC P'O' PCSAV! = a when no S'lilT .acro vas issued
= address of user save area
(indicating that the STIlT macro vas issued)
224 IBM VM/370 Data lreas and Control Block Logic