FVSECT FVSECT is used mainly by file management and I/O routines. FVS contains save areas, work
areas, and commonly used constants. A typical use of FVS is when a reentrant I/O routine
requires a work area or save area, since the routine cannot modify itself. FVSECT is
invoked by the FVS macro. 01 I I DISK$SEG 38! REGSAV3 1-------------------------------------------------------- 781 RWFSTRG 1-------------------------------------------------------- COl ADTFVS 1------------------------------------------------------- C81 I 100 108 148 150 F65535 VFREE REGSAVO A*1 REGSAV1 FW4 F10C Section 2. CMS tata Areas and Contrel Blocks 191

FVSECT ,
158 VFRET JSRO 160 JSR1 R1UHD 168 F800 170 FVSDSKI DSKLOC 178 RWCNT DSKIDR 180 ADTADD
188 FINISLST
198 lAO FFE FFD lA8 //////1 1*5 1*6 I 1*7 1BO lB8 1CO lC8 1DO 1D8 1EO lE8 FVSFSTM FVSER1Sl REIDCNT FVSFSTDT FVSFSTIC FVSFSTIL FVSFSTID FFF
SIGNAL A*3 I 1*4 FVSER1S0 FVSERlS2 1/////////////////////////// FVSFSTN FVSFSTT FVSFSTRP FVSFSTCL 1*8 I 1*9 FVSFSTYR FVSFSTAC 192 IBM VM/370 Data Areas and Control Block Logic