PUBOWNER PUBOWNER contains a 2-byte entry for each entry in the FUB table. For there are
eighteen 2-tyte entries. The address of the PUEOWNER table is in the block in the DOSCON CSECT of NUCON. o 20 Hexadecimal Field
Displacement Na.e
o
o PUBOWNER DS DC PUBOWNER OH 18X'0001' Field Description, Contents, Meaning PUB ownership table PUB owner PUBOWNER entries have the following meanings:
1 Value X'OO' X'40' X' 0 l' The physical unit is reserved CMS is vaiting for the volume to be .ounted . Backgrotind partition owns the physical unit 230 IBM VM/370 Data Areas and Control Block Logic

SSAVE SSAVE is used by DMSITS to saye the value of the SVC old PSi, the caller's registers, and
other necessary control information required to Frocess the SVC and return to the caller. Since SVC calls can be nested, several of these save areas can exist at one time. The system save area is dynamically allocated in protected free storage. SSAVE is invoked via the CMSIVE macro. 0 A* 1 I 1*2 CODE CALLER
8 CALLEE 10 OLDPSW i8 NRIiRET ERRET 20 EGPRO EGPR1 28 EGPR2 EGPR3 30 EGPR4 EGPR5 38 EGPR6 EGPR7 40 EGPR8 EGPR9 48 EGPR10 EGPR11 50 EGPR12 EGPR13 58 EGPR14 EGPR15 60 EFPRO 68 EFPR2 70 EFPR4
78 EFPR6 80 CHKWRD 1 SSAVENXT 88 SSAVEPRV USAVEPTR 90 OSTEMP 1*3 I KEYS 98 KEYS (cant. ) XGPRO 10 XGPR1 XGPR15 A8 XCOUNT CHKiRD2 Section 2. CMS Lata Areas and Contrel Blocks 231