SYSNAMES SYSNAMES defines the names of any saved systems which may te loaded by CMS routines. SYSNAMES describes the entries in the SYSNAftES table which is pointed to by the ASYSNAMES field in NUCON. o S 10 1S Hexadecimal Field
Displacement Name ------------ 0 CMSSEG S CMSVSAM 10 CMSAMS 1S CMSDOS 20 SYSNEND SYSNCNT DC DC DC DC DS EQU CMSSEG CftSVSAM CMSAftS CliSDOS CLS'CMSSEG' CLS'CMSVSAM' CL8'CMSAMS' CLS'CMSDOS' OD Field Description, Contents, Meaning CftS shared system name VSAM shared system name Access Method Services shared system name tos shared system name (SYSNEND-SYSNAMES)/€ Size in doublewords (X'04') 242 IBM VM/370 Data Areas and Control Block Logic

TSOBLKS TSOBLKS DSECi describes the entries in the block which centains OS centrel
information used by CMS, that is, the co.mand program parameters list (CPPL), user
profile table (UPT), protected step control block (PSCB), and the environment centrel
table (ECT). The ITSOCPPL field in NUCON points to TSOELKS block. I I 0 I CPPLOBUF CPPLUPT I I I 8 I CPPLPSCB CPPLECT I I I 10 I11111111111111 UPTUSEB I I I 18 I UPTUSER (cont.) I 1*1 1*2 I 1*3 1//11111 I 20 I PSCEUSEB I A*4 I 28 I PSCBGPNM I 30 I1111 1*5 11111 A*6
48 PSCBTCOL 50 PSCBBLGB PSCBUPT 58 PSCBUPTL 11/1111111111 PSCBRSZ Hexadecimal 60 68 "7In IV 78 80 88
Displacement
------------ 0 0 4
8
C 10 10 12 1C A*7 ECTBTCD ECTSMSG ECTPCMD (cont.) ECTSCMD (cont.) ECTUSER Field
Name CPPL DS OF CPPLOBUF DC lL4 (0) CPPLUPT DC lL4 (UPT) CPPLPSCB DC AL4 (PSCB) CPPLECT DC AL4 (ECT) Q§g Table UPT DS ---OF DS CL2 UPTUSEB DS CL10 UPTSWS DC X'OO' !!!!§ in UPTSWS EQU --X'80'-- UPTNPRM EQU X'40' UPTMID EQU X'20' UPTNCOM EQU 1'10' PSCBU 1*1 ECTIOWA EC'IPC!!D ECTSCMD A*9 ECTDDNUM Field Description, Contents, Meaning Temporary PLIST to CP programs
Address of command line
Address of dummy UPT Address of dummy PSCB Address of dummy ECT
Reserved for IBM use
Reserved for installation use User's environment switch
Beserved for IBM use
No prompting is to be done Print message identifiers No user communication allowed via SEND Section 2. CMS tata Areas and Contrel Blocks 243