OF AMENDBENTS •• 1.% SECTION 1. CP DATA AREAS and CONTROL BLOCKS. • • • • • • •• • • • • .1 ACCTELOK: User Accounting Block. • • .2 ACBTELOK: Accounting Card Buffer Block •• 2 ALOCBLOK: DASD Cylinder Allocation Block .4 ESCBLOK: Binary Synchronous Communication Control Block ••••••••• _ •••• 6 BUFFER ••••••••• _ ••••• ____ .8 CCHREC: Channel Check Handler Record. _ .9 CCFARM: Communications Controller
Parameter List •••••• •••••• 11 CHIBLOK and CHYBLOK: Virtual Channel-to-Channel Adapter Control Elocks •• _ ••••••• _ ••• _ ••• 12 CKPBLOK: Telecommunications Checkpoint Block • '. '. _ •••• _ • • • 14 CONTASK: Console I/O Package •••••• 15 CORTABLE: Storage Allocation • _ • 17 CPEIELOK: CP Execute Block ........ 18 DDRREC: Reconfiguration Macro •••••• 19 D!PINREC: Dump File Information Record • 20 DMPKYREC: Dump File Key Storage Record • 21 D!PTEREC: Dump File Symbol Table Record. 21 ECBLOK: Extension to VMBLOK for Virtual !achine with Relocate • _ • • _ • 22 ERRELOK: Error Block Used to Build OBR/MDR • _. • .. • • • .. .. .. • • • 24 IOBLOK: I/O Task Control Block ••••• 25 IOERBLOK: IIO Error Information Block. - 27 IRMBLOK: Intensive Error Recording Mode Elock. • • • • • • • • • •• • • • 31 JPSCELOK: Journaling and Password Suppression Control Block • • • • • • • 32 LOCKELOK: Userid Lock Control Block. 33 MCH!RE!: Machine Check Save Area •••• 34 !CRECORD: Machine Check Handler Record 37 MDRREC: Miscellaneous Data Recording Record. _ • • • • • .. • • • • • • • .. 38 MICBLOK: Virtual Machine Pointer List
for VM/370 Hardware Assist ........ 39 MIHREC: Missing Interrrupt Handler Error
Record. • • • • • • • • • • • • • • • • 40 MNHDR: VM/370 Monitor Record Header ••• 41 MNOOO: VM/370 Monitor Perform Class Record. • • • • • • • • ......... 42 MN001: VM/370 Monitor Perform Class Record. • • • • • • • • • • • • • • • 45 MI097: VM/370 Monitor Header Records •• 46 MN098: VM/370 Monitor Trailer Record • '. 46 MN099: VM/370 Monitor Suspension Record. 47 M110I: VM/370 Monitor Response Class Records _ _ • • • • • • _ • • • • • • _ 47 MN20I: VM/370 Monitor Schedule Class Records • • • • • • • • • • • • • • • • 48 M1400: VM/370 Monitor User Class Record. 49 MN500: VM/370 Monitor Instruction Simulation Class Record • • • 50 MN600: VM/370 Monitor DASTAP I/O Count Records • • • .. • • • .. • • • • • • • • 51
Contents MN602: Vft/370 ftonitor DlST!P Utilization Record ••••••••••••••••• 52 M1700: VM/370 Monitor Seeks Class Record 53 MN802: VM/370 Monitor System Profile Class • • • • • • • • • • • • • • • •• 54 MNDEVLST: VM/370 Monitor Class 6 (DASTA P) Device List. • • • • • • • • • 55 MCNCOM: VM/370 Monitor Communications Area ••••••• _. • • • • • • • .56 MSSCOM: MSS Communications Control Block 59 NCPTBL: Named 3701 Control Program Table 60 NICBLOK: Network Interface Control Block 61 IPBTBL: Named 3800 Image Library Table. 63 OBBRECN: Unit Check Error Record (long Outboard Record). • • • • • • ••••• 64 OBBREC: Unit Check Error Record (Short C u tb oa rd Rec 0 rd). • • .. • • • • • • • • 66 OWIDLIST: CP-Owned Volumes List ••••• 67
PAGTABLE : Translation Page Table • • • • 67 PGBLOK: Pseudo Page Fault Stack Block •• 68 PSA: Prefix Storage Area (Low Storage Lcca tions). • • • • • • • • • • • • 69 PWDIBLOK: Password Invalid Block • 78
REAL I/O CONTROL BLOCKS. • • • 79 Beal Channel Control Blocks. 79 Beal Control Unit Blocks • • 79 Beal Device Control Blocks • • 79 Input/Output Blocks. • • • • • _ .. 79
Network I nterface Control Block '. • 80 RCHBLOK: Real Channel Block. • • • • 81 RCUBLOK: Beal Control Unit Block • • 82 RCWTASK: Translated Virtual I/O CCWoo 84 RDEVBLOK: Real Device Block ••••••• 85 RECBLOK: DASD Page (Slot) Allocation
Block • • • • • • • • • • • • • _ _ • • 89 RECPAG: Error Recording Page Record. 90 RSFLCTL: Beal Spooling Control 91 RSPIELOK: tteai Device Extens10n EloCK •• 91 SAVEAREA • .• • • • • • • • • • • • • 92 SAVTABLE: First Page on Saved system DASD ............... oo. 93 SDRBLOK: Statistical Data Recording
Block • • • • • .. • • • • • • • • • • • 94 SEGTABLE: Translation Segment Table ••• 95 SFBLOK: SFool File Block • • • • • • 96 SHCBLOK: Spool Hold Queue Block ••••• 98 SHETABLE: Named-Shared Segment Systems Table • • • • • • • • • • • • • • • • • 99 SFLINK: SFool Page Buffer Linkage Block.1eO SWPTABLE: Swap Table for Virtual Machine Paging ••••••••••••• 101 SYSLOCS: System Low Storage Information Block. • • • • • • • • • •• • •• 102 SYSTBL: Named System Table. • • .103 TNSREC: "T" Type Record Format
(Environmental Recording) • • • • .104 TREIT: Virtual Machine Tracing
Extension to VMBLOK • .. • • • • • • • .105 TECBLOK: TOD Clock Comparator Request •• 107 UDBFBLCK: User Directory Buffer Block •• 108 UDEVBLOK: User Device Block. • .109 UDIRBLOK: User Directory Block ••••• 110 Contents v

UMACELOK: user Machine Block. .111 VIRTUAL I/O CONTROL BLOCKS. • .113 Virtual Channel Blocks. • • .113 Virtual Control Unit Blocks •••••• 113 Virtual Device Blocks. • •••• 113 VCHBLOK: Virtual Channel Block.114 VCONCTL: Virtual Console Control Block .115 VCUBLOK: virtual Control unit Block ••• 116 VDEVBLOK: Virtual Device Block •.•••• 117 VFCBELOK: virtual Forms Control Buffer
Elock ••••••••••••••••• 120 VMABLOK: Shared Systems Control Addition to VMBLOK •••• ' ••••••• 120 VMBLOK: Virtual Machine Control Block •• 121 VMCBLOK: Virtual Machine Communication
Block. _ • • • • • • • • • • • .128 VMCMHDR: VMCF Message Header ••• _ •• 129 VMCPARM: VMCF Parameter List ••• _ •• 130 VRRBLOK: Virtual ReservejRelease Block .131 VSPLCTL: Virtual Spooling Control Block.132 VSPXELOK: virtual Spool Extension Block.133 IINTELOK: External Interrupt Block ••• 134 IOBR3211: Extended Outboard Recording
Block. • • •••••••••••• 135 SECTION 2. CMS DATA AREAS AND CONTROL BLOCKS. .• • ••••••••• , ••• 137
AETAB: Abend Termination option Table •• 138 AEWSECT: Abend Recovery Workspace. ..139 AtTSECT: Active Disk Table _ •••••• 140 AFTSECT: Active File Table • ••••.• 143 ANCHSECT: Anchor Table •••••• _ •• 145 EATLSECT: CMS Batch USEr Job L i-a its .... ,,146 EEOI: Boundary Box ••••••••••• 146 EGCOM: DOS/VS Partition Communication Region ••••••••••••••••• 147 CMSTAXE: Terminal Attention Exit
Element •••••••• _ ••••••• 149 CVTSECT: Communication Vector Table as
supported by CMS •••••••••••• 150 DEGSECT: Debug Work Area. ' ••••••• 152 DEVSECT: Device Table DSECT ••••••.• 156 DFVTAE: Device Table •••••••••• 157 DIOSECT: Disk I/O Work Area ••••••• 160 DMSCCB: Command Control Block. .162 tOSSECT: DOS Simulation Control Block •• 164 EDCB: Edit Control Block •••••••• 166 ERDSECT: Error Handling Routine DSECT •.• 174 EXTSECT: External Interrupt Work Area •• 177 EXTUAREA: External User Area •••••• 179 FCBSECT: Simulated OS Control Blocks •• 180 FCBTAB: Fetch Table. • • • • • • • .184 FICL: First In Class Block ••••••• 185 FRDSECT: Free Chain Element Header
Elocks. • • • • • • • • • • • • • FSCBD: File System Control Block • FSTD: File Status Table Entry DSECT •• FSTSECT: File Status Table •••••• FVSECT: Fixed Variable Storage Work .• 186
.188
.189 • 190 Area for CMS File System •••••••• 191 IHADECB: Data Event Control Block •••• 195 IOSECT: I/O Interrupt Save Area ••••• 196 KEYSECT: Disk Key Table DSECT for BDAM Simulation ••••••••••••••• 197
LtRST: Loader Storage Area ••••••• 198 LUETAB and LUEPR: Logical Unit Block
Table • • • • • • • • • • •••• 202 NICL: Number in Class. • • • • • • .204 NUCON: Nucleus Constant Area • • • .205 OFSECT: Major CSECT for all I/O Operation Lists •••••••••••• 219 OSFST: OS File Sta tus Tatle. • • • .222 OVSECT: Describes the First Few
Lccations of DMSOVS •••••••••• 224 PCTAB: Progra II Check Option Tabl e. .224 PDSSECT: Directory Table for EPAM Simulation. • • • • • • • • • • • .225 FGMSECT: Program Interrupt Work Area •• 226 PIBADR: Program Information Block •••• 227 PIB2TAB: Program Information Block
Extension ••••••••••••••• 228 PUBADR: Physical Unit Block Table •••• 229 PUBOWNER: Physical Unit Elock Ownership Table. • •• • • • • • • • • •• 230 SSAVE: System Save Area. • • • • • .231 SUBSECT: Subset Work Are a. • • • • • • .233 SVCSECT: SVC Interrupt Storage .••••• 234 SVEARA: LTA and PP Save Area DSECT ••• 238 SYSC08: System Communication Region ••• 239 SYSNA8ES: Saved Systems Names. .242 TSCBLKS: TSO Control Blocks. .243 USAVE: User Save Area. • • • • ••• 245 USERSECT: User Work Area • • • .245 SECTION 3. RSCS DATA AREAS AND CONTROL BLOCKS. • •• • • • • •• • •••• 247 ASINE: Asynchronous Exit Element •••• 248 BUFDSECT: SML Telecommunications Buffer.249 COMDSECT: Address Constants as Pointers.250 DEVTABLE: NPT Device Table ••••••• 251 FR-EE-E·:-·A Free·Blelle-at on the Supervisor- Element Cueue • • • • • • • • .252 GIVE Request Table • • • • • • • .253 GIVEE: A GIVE Element. • .253 IOE: An I/O Element. • • .254 IOTABLE: An I/O Table. • .255
LINKTABL: Link Table • • • • • • • .256
RE CBLOCK: 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: S8L Unit Record Tank .266
TAEEA: A Task Save Area. • • .267 TASKE: A Task Element. .269 TCTDSECT: Task Control Tatle .270 AFPENDIXES ••••••••••••••• 273 AFFENDIX A. CP and RSCS EQUATE SY8BOLS .275 VM/370 Device Classes, Types, 8odels, and Featurese e e ••••••••••• 276 VM/370 EQUATE SYMBOLS -- Machine Usage .278 VM/370 EQUATE SYMBOLS -- Extended Centrel Registers ••••••••••• 279 VM/370 EQUATE SYMBOLS -- CP usage •••• 280 VM/370 Registers • • • • .283 AFPENDIX E. RSCS CONTROL AREAS AIS Moniter Control Area • REX Monitor Control Area •• SML Moniter Centrol Area • .285 • ••• 286 ••• 287 • .288
vi IBM VM/370 Data Areas and Control Block Logic