Logrec data set time stamp record

Table 1. Format of the time stamp record
Offset Size (bytes) alignment (bits) Field name Description
Dec Hex
0 (0) 1 CLASRC Class/Source:
1... ..11   Time stamp record.
1 (1) 1 OPSYS System/Release level:
    100. ....   Operating System (OS)/Virtual Storage (VS)2.
    bits 3-7    
    0-1F   Release level 0-31.
2 (2) 4 SW1 Record switches:
    Byte 0    
    1... ....   More records follow.
    0... ....   Last record.
    .1.. ....   Time-of-day clock instruction issued. Used in conjunction with date and time values at displacements 8 and 12.
    ..1. ....   Record truncated. (Not used for time stamp record.)
    ...1 ....   Record created by MVS/SP Version 2, 3, or 4.
    .... 1...   TIME macro used.
    .... .xxx   Reserved.
    Bytes 1 and 2   Not used for time stamp record.
    Byte 3   Incremental release number (alphanumeric) of operating system.
6 (6) 2   Not used for time stamp record.
8 (8) 4 DATE System date for IPL records (updated by input/output supervisor (IOS) outage recorder at 3 minute time intervals).
12 (C) 4 TIME System time for IPL records (updated by IOS outage recorder at 3 minute time intervals).
16 (10) 1 VERNO Machine version code.
17 (11) 3 CPUSER Central processor serial number.
20 (14) 2 CPUMODEL Central processor machine model number (for example, 3090).
22 (16) 2 MCELLNG Reserved.
24 (18) 16   Reserved.