Page of SY20-0884-3 As Updated 1, 1979 by TNL SN25-0497 CMSTAXE: Terminal Attention Exit
Element .149 CVTSECT: Communication Vector Table as
supported by CMS. • • • DBGSECT: Debug Work Area • DCHSECT: Data Control
Hyperblock(5748-XX8) •• DCHSECT: Data Control .150 • •• 152 • 1;:)0 • • .156 DEVSECT: Device Table DSECT. .156 DEVSECT: Device Table DSECT(2148-XX8) .156.1 DEVSECT: Device Table .156.1 DEVTAB: Device Table • • • • • • • .157 DIOSECT: Disk I/O Work Area. • • •• 160 DIRSECT: CMS PDS Directory
Entry (5748-XX8) ••••••• DIRSECT: CMS PDS Directory
En try (2 7 4.§=XE 1) • • • • • • • DMSCCB: Command Control Block. DMSCCB: Command Control Block(2748-XX8) ••••••• DMSCCB: Command Control • .162.1 • • 162. 1 • •• 162 • .162.2 • • • • • • • • .162.2 DOSSECT: DOS Simulation control Block •• 164
EDCB: Edit Control Block •••••••• 166 ERDSECT: Error Hand,ling Routine DSECT •• 174 EXTSECT: External Interrupt Work Area •• 177 EXTUAREA: External User Area • • • • •• 179 FCBSECT: Simulated OS Control Blocks •• 180 FCHTAB: Fetch Table •••••• • .184
FICL: First in' Class Block • • • • .185 FRDSECT: Free Chain Element Header
Blocks. • • • • • • • • • • • •• .186 FSCBD: File System Control Block • • • • 188 FSTD: File Status Table Entry DSECT ••• 189 FSTSECT: File Status Table ••••••• 190 FVSECT: Fixed Variable Storage Work Area for CMS File Sy stem. • • • • • • • 191
IHADECB: Data Event Control Block •••• 195 IOSECT: I/O Interrupt Save Area ••••• 196 KEY SECT: Disk Key Table DSECT for BDAM Simulation ••••••••••••••• 197 LABSECT: Tape Label Information (.2748- Xl!!>. • • • • • • • • • • • LABSECT: Tape Label Information
.198 (.2 7 4 .§::.ill). • • • • • • • • • • • • 1 9 8 LDRST: Loader Storage Area. • • • .198 LDRST: Loader Storage Area (5748-IX8) .198.1 LDRST: Loader Storage Area LIBSECT: CMS PDS Header ••• 202 LIBSECT: CMS PDS Header (5748-XE1) ••• 202 LUBTAB and LUBPR: Logical Unit Block
Table ••••••••••••••••• 202 LUBTAB and LUBPR: Logical Unit Block
Table (.2748-XX8) ••••••• LUBTAB and LUBPR: Logical Unit Block .202.1 Table(5748-XEi) • • • • • • • • .202.1 NICL: Number in Class. • • • • .204 NUCON: Nucleus Constant Area. • • .205 OPSECT: Major CSECT for all I/O Operation Lists. • • • • • • • • .219 OSFST: OS File Status Table ••••••• 222 OVSECT: Describes the First Few
Locations of DMSOVS • • • • • •• .224 PCTAB: Program Check Option Table •••• 224 PDSSECT: Directory Table for BPAM simUlation. • • • • • • • • • • • .225 PGMSECT: Program Interrupt Work Area •• 226 PIBADR: Program Information Block. .227
PIB2TAB: Program Information Block Extension. • . . . . . • . . .. .228 PUBADR: Physical Unit Block Table. .229 P{JBQWNER: Physical Unit Bleck Ownership· Table • • • • • • • • • • .230 SSAVE: System Save Area. • • • •• .231 SUBSECT: Subset Work Area. • • • • SVCSECT: SVC Interrupt Storage • • SVEARA: LTA and PP Save Area DSECT SYSCOM: System Communication Region •• SYSNAMES: Saved Systems Names •• TLBBLOK: Tape Label Processing
.233
.234
.238 • 239
.242
Information (2148-XX8) ••••• TLBBLOK: Tape Label Processing
.242.1
Information (2148-XE1) ••• TSOBLKS: TSO Control Blocks ••• USAVE: User Save Area. • • .242.1
.243
.245 USERSECT: User Work Area • • • • • .245 SECTION 3. RSCS DATA AREAS AND CONTROL BLOCKS. • • • • • • • •• •••• .247 ASYNE: Asynchronous Exit Element • • • .248 BUFDSECT: SML Telecommunications Buffer.249 COMDSECT: Address Constants as Pointers.250 DEVTABLE: NPT Device Table • • • • • • .251
FREEE: A Free Element on the Supervisor Element Queue • • • • .252 GIVE Request Table • • .253 GIVEE: A GIVE Element. • •••• 253 IOE: An I/O Element. • • •••• 254 rOTABLE: An 1/0 Table. .255
LINKTABL: Link Table • • • .256 REQBLOCK: NPT Request Block. • • .258 ROUTE: Routing Table Entry • .259 SVECTORS: Low Storage Definitions. .260 TAG: RSCS File Descriptor. • • • .263
TAGAREA. • • • • • • • • • • • • .265
TAKE Request Table ••••••••••• 265 TANKDSEC: SML Unit Record Tank • .266
TAREA: A Task Save Area. • • • • .267 TASKE: A Task Element •••••••••• 269 TCTDSECT: Task Control Table • .270 APPENDIXES • • • • • • • • • • .273 APPENDIX A. CP and RSCS EQUATE SYMBOLS .275 VM/370 Device Classes, Types, Models,
and Features. • • • • • • • • • .276 VM/370 Equate Symbols -- Machine Usage • • • • • • • • • • • • •• .278 VM/370 Equate Symbols -- Machine Usage • • • • • •• .278.1 VM/370 Equate Symbols -- Machine Usage • • • • • •• .278.1 VM/370 Equate Symbols -- Extended
Control Registers • • • • • • • • .279 VM/370 Equate SymbolR -- CP rysage. .280 VM/370 Equate Symbols -- CP Usage 7 4 ,§- X X 8). • • • • • • • • • • • • • 2 80 • 1 VM/370 Equate Symbols -- CP Usage (5748-XE1). • • • • • •• • ••• 280.1 VM/370 Registers • • • • • • • • .283 APPENDIX B. RSCS CONTROL AREAS • .285 AXS Monitor Control Area .286
Contents vii

Page of SY20-0884-3 As Updated Aug. 1, 1979 by TNL SN25-0497 REX Monitor Control Area • SML Monitor Control Area • ••• 287
.288 APPENDIX C. RSCS REQUEST ELEMENTS. .291
Command ALERT Element Format A1. • .292
Operational Notes. • • • • .292
Command ALERT Element Format A2. • .293
Operational Notes. • • • • .293
Command ALERT Element Format LO, • .294
Operational Notes. • • • • • •• 294
Command ALERT Element Format L1. • .296
Operational Notes. • • • • .296
Command ALERT Element Format L2. • .297
Operational Notes. • • •• •• • .297
Command ALERT Element Format L3 (also
Message Alert Element). • • • .298
operational Notes. • • .298
Command Request Element. .299
Operational Notes. • • • • • .299
File Request Element .300 Operational Notes. • • • • • • • .300 FIGURES Figure 1. CP Control Block
Relationships ••••••••••••••••• 1
Figure 2. CMS Control Block
Relationships ••••••••••••••• 137
Line Alert Element • • • • Operational Notes. • • • Message Request Element. • Operational Notes. • • • Port Table • • • • • • • • Operational Notes. • • • Terminate Request Element.
Operational N?tes. • APPENDIX D. CMS EQUATE SYMBOLS • • eMS Usage Equates. • • CMS Register Equates • APPENDIX E. DATA AREAS AND CONTROL BLOCK REFERENCES. • • CP Control Block References •• CMS Control Block References RSCS Con trol BLock RefE!rences.
viii IBM VM/370 Data Areas and Control Block Logic .302 .302 .303 .303 .304 .304 .305 .305 .307 .308 .309 .311
.312
.322
.327