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Hex Dec Type/Val Lng Label (dup) Comments
---- ---- --------- ---- -------------- --------
0000 0 Structure IPLREC System Initialization (IPL) record
Type of record
0000 0 Bitstring 1 IPLKEY1 Class/Source(type of record)
00000050 IPLIND X'50' IPLIND IPL record
System and Release level of issuing system.
0001 1 Bitstring 1 IPLKEY2 System/Release Level of issuing
system
00000080 IPLMVS X'80' IPLMVS System is OS/VS2 or
a later MVS system
00000060 IPLVM X'60' IPLVM System is CP67,
VM/370 or a later VM system
00000040 IPLOSVS1 X'40' IPLOSVS1 System is OS/VS1
00000020 IPLDOS X'20' IPLDOS System is DOS (VSE)
00000000 IPLOS360 X'00' IPLOS360 System is OS/360
(X'00'-X'1F') Release level
Miscellaneous switches.
0002 2 Bitstring 1 IPLSMS Record-independent switches
1... .... IPLMORE X'80' IPLMORE More records follow
If this is the last record, this
bit is zero.
.1.. .... IPLWTOD X'40' IPLWTOD IBM System/370
time-of-day clock instruction
issued. If this bit is zero, an
IBM System/360 TOD clock
instruction was issued. This is
used in conjunction with IPLDATE
and IPLTIME.
..1. .... IPLTRUNC X'20' IPLTRUNC Record truncated.
...1 .... IPLXA X'10' IPLXA 370-XA mode record.
.... 1... IPLTMAC X'08' IPLTMAC TIME macro used
(OS/VS) If zero, the time is in
timer units (VSE).
Operating system- and processor-specific information
0003 3 Bitstring 2 * Reserved.
0005 5 Bitstring 1 IPLINCRL Incremental release number of
operating system
0006 6 Bitstring 2 * Reserved.
0008 8 Dbl-Word 8 IPLDT (0) System date and time when record
was created.
0008 8 Signed 4 IPLDATE System date of failure.
000C 12 Signed 4 IPLTIME System time of failure
0010 16 Dbl-Word 8 IPLCPUID (0) CPU identification
0010 16 Bitstring 1 IPLVER Machine version code
.... ...1 IPLVERII X'01' IPLVERII Version II CPUs.
If this bit is zero, version I
CPUs.
0011 17 Bitstring 3 IPLSER CPU serial number
0014 20 Bitstring 2 IPLMOD CPU machine model number
0016 22 Bitstring 2 IPLCEL Maximum length of machine- (CPU-)
dependent machine-check extended
logout area.
Restart- and IPL-specific information
0018 24 Bitstring 1 IPLSYSID Device type or program that
caused restart.
00000091 IPLPP X'91' IPLPP IBM Programming
Products
00000090 IPLSCP X'90' IPLSCP IBM System Control
Program
00000080 IPLGRAF X'80' IPLGRAF
Graphics/Display/Audio
00000070 IPLTP X'70' IPLTP Teleprocessing
00000060 IPLOCR X'60' IPLOCR MICR/OCR
00000050 IPLUR X'50' IPLUR Card/Print
00000040 IPLTAPE X'40' IPLTAPE Tape
00000030 IPLOTHER X'30' IPLOTHER Other (All devices
other than those included under
other subsystem IDs
00000020 IPLDASD X'20' IPLDASD Direct Access
(DASD)
00000010 IPLCPU X'10' IPLCPU Processor (CPU,
channels, storage units, operator
consoles)
00000000 IPLNULL X'00' IPLNULL Subsystem is
unknown or subsystem code is not
required by reason code.
0019 25 Bitstring 3 * Not used for IPL record.
001C 28 Character 2 IPLREAS Alphameric code representing the
reason for IPL.
Reason codes
0000D5D4 IPLNORM C'NM' Normal system
initialization
0000C9C5 IPLNOCE C'IE' IBM hardware/programming
problem. CE/PSR not reqd.
0000C9D4 IPLCEREQ C'IM' IBM hardware/programming
problem. CE/PSR required.
0000D4C5 IPLMEDIA C'ME' IBM hardware unit failed
because of faulty media.
0000E4D5 IPLUNKWN C'UN' Undetermined hardware or
software failure.
0000D6D7 IPLOPER C'OP' Operator error or
procedural problem.
0000E4D7 IPLUSER C'UP' A program other than an
IBM- supplied SCP or PP failed
and caused a restart.
0000C5D5 IPLENV C'EN' Environmental problem
(power failure, air conditioning,
etc.)
0000C3C5 IPLCEPSR C'CE' System restarted at CE/PSR
request.
0000C4C6 IPLDFLT C'DF' Default
001E 30 Bitstring 2 IPLCHNM Channel map.
0020 32 Dbl-Word 8 IPLCHAN Channel type assignment at IPL.
(Not used for 370-XA.)
0028 40 Signed 4 IPLHADDR Address of the last valid byte of
storage found at IPL time (MVS
only).
002C 44 Signed 4 IPLSDATE Time-stamp date (MVS only).
0030 48 Signed 4 IPLSTIME Time-stamp time (MVS only).
Record size in bytes and doublewords.
00000034 IPLBLEN *-IPLREC IPLREC size in bytes
00000007 IPLSIZE (*-IPLREC+7)/8 IPLREC size in
doublewords
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