EXTUAIHA EXTUAREA is a 96-byte user area generated by
area is passed to the user via register 13.
the user area.
the C!SAVE macro. The peinter to the user The USAVEFTR field in also Faints tc
r
o I GRS 40 FRS 60 UEXTPSWO 68 USERAREA Hexadecimal Field
Displacement Name Field Description, Contents, I!eaning ------------ -------------------------------------- DS OD 0 GRS DS 16F Registers at time of interruFt 40 FRS DS 4D Floating-point registers at interrupt 60 UEXTPSWO DS 1D External old PSi at interrupt
68 USERAREA DS 18F User save area BO USEREAND DS OF End user area Section 2. CMS rata Areas and Contrel Blocks 179
FCBSECT FCBSECT consists of the CMS File Control Elock (FCE) (used for file management under CMS), the simulated OS Job File Control Block (JFCB), Input/Output Block (lOB), and Data
Extent Block (DEB). FCBSECT is invoked via the CMSCE macro. FCBSECT is dynamically
allocated from CMS free storage each time the FILEDEF command is issued.
o FCBNEXT FCEPROC 8 FCBDD 10 FCBOP 18 FCBDSNIM 20 FCBDSTYP 28 FCBDSMD FCBITEM FCEBUFF 30 FCBBYTE FCEFORM FCBCOUT 38 FCBREID 1*2 FCBXTENT 40 FCBRECL I 1*3 I 1*4 FCEMEMBR 48 FCBMEMBR (cont.) FCBOSFST 50 FCBOSDSN PCER13 58 FCBKEYS . FCBPDS 60 JFCBftlSK 68 JFCBCRDT JFCBXPtT I 1*5 1*6 70 1*7 I A*8 JFCBUFL A*9 1*10 1//////1 1*11
78 JFCLIMCT (cont.) I JFCDSORG A*12 1*13 JFCBLKSI 80 JFCLRECL I A*14 I A*15 1///////////////////////////
88 DEBTCBAD SEBSIV 90 DEBOFLGS DEBCPITB 98 IOBNXTID IOBECB AO DEBDCBID IOBECBPT A8 IOBCSW BO IOBSTART IOBtCBPT Format of Location X'24' for Console Device 20 FCBIOOUT r
28 I FCBIOOUT (cont.) FCBIOBUF 30 I 1*16 I A*17 I FCBIOCNT 180 IBM VM/370 Data Areas and Control Block Logic
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