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---- -_.- Technical Newsletter This Newsletter No. GN25-0829 Date April 1, 1981
Base Publication No. GC20-1807-7 File No. 8370-36 (VM/370 Release 6_PLC 17)
Prerequisite Newsletters/ GN25-0492 Supplements I BM Virtual Machine Facility /370: System Programmer's Guide
© Copyright IBM CO!p. 1976, 1977, 1979, 1981. This Technical Newsletter contains replacement pages for VM/370 Programmer's Guide to support Release 6 PLC 17 of IBM virtual Machine
Facilit y/370. Before inserting any of the attached pages into the Guide, read the instructions on this cover. They
indicate when and how you should insert pages.
Pages to
be Removed Notice
Preface iii-vi
contents vii-xii
Summary of Amendments xiii-xvi
5-6
15-16
19-20
41-42
45-46 59:-64 71-72
79-80
91-92
99-102 107-108 111-112
115-116
127-128
133-136
139-148
153-154
157-166
171-172
181-190
193-1 94
197-198
201-212
219-222
225-228
245-252
255-256
261-262
273-274 277-280 287-294
297-298
311-314 361-362
In d ex 3 67-3 84
Attached Pages
to be Inserted*
Title, Edition Notice Preface iii-vi
Contents vii-xiv
Summary of Amendments xv-xviii
5-6
15-16
19-20
41-42
45-46
59-64.2
71-72 79-80 91'-92 99-102.2 107-108 111-112
115-116
127-128
133-136
139-148
153-154
157-166.2 171-172.2, 181-190
193-194
197-198.2
201-212
219-222
225-228
245-252
255-256
261- 262
273- 274 277-280.2 287-294
297-298
311-314
321-322
361-362
Index 367-384 IBM Corporation, Programming Publications, Department G60, PO Box 6, Endicott, New York 13760 © Copyright IBM Corp. 1981
Printed in U.S.A.

Format of Trace Tab(e Entry I , _)_DI\lK.PM j 01 -j k-'OJ' h X'OOOOOOOOOO' i I I SVC interrupt I DMKSVr. I 02 I -- I I I I I Program interrupt 03 I LOlerrupt 6 Code ExternaTTIidPsW SVC Old PSW Program Old PSW Machine Check
DMKMCH 04 Machine Check Old PSW Interrupt I/O interrupt DMKIOS 05 I/O Old PSW + 4 CSW Free Storage (FREE) DMKFRE 06 GR Oat entry I .. """ I 07 GR Oat entry
Enter Scheduler
Queue drop
Run user I 513rt1/0 DMKSCH DMKSCH DMKDSP DMKCNS DMKIOS DMKCPI Unstack 1/0 interrupt DMKDSP i
Virtual CSW store i DMKVSI I Testi/O I Halt Devioe
Unstack IOBLOK or TROBLOK NCP BTU
(See Note3l
Spinning on lock SiG? issued
Clear Channel
issued DMKCPI DMKIOS DMKCNS DMKIOS DMKVSI DMKCPI DMKDS? DMKRNH
DMKEXT DMKVSI 08 09 OA OB DC 00 OE OF 10 12
13
14
Value of VMRSTAT, VMDSTAT, VMOSTAT, RUNUSER value
from PSA Address of 10BLOK Address of VMBLOK Address of VMBLOK Address of IOBLOK Address of IOBLOK Address of VMBLOK
CAW VirtualCSW VirtualCSW CAW
CAW
Address of 10BLOK or TROBLOK Virtual CSW ForCC = 1, CSW+4 otherwise tnis field is
12 not used
For CC = 1, CSW + 4 otherwise this field IS For CC = 1, CSW + 4
otherwise this field is
not used Interrupt Return
Address
lock word Contents
Status of
Condition Code = 1 Notes: 1. If the installation is running in attached processor mode, the identification code will be OR'd with an X'40' if the activity occurred on the attached processor.
Figure If the installation is running ECPS, the identification code is OR'ed with an X'SO' if the activity occurred in microcode.
2. If the interrupt code (bytes 6 and 7) is OC, the contents of GRT4 are displayed. For all other interrupt codes, the contents of GRT5 are displayed.
3. Bytes 2 through 15 of a code 11 trace record represent a Basic Transmission Unit, sent or received by a 370413705. If CONSYSR/CONEXTR are zero, the BTU was transmitted to the 3704mOS. If they are non-zero, the BTU was received. If CONTCMO equals X7700', this is an unsolicited BTU response.
CP Trace Table Entries Abend Dumps
There are three, kinds of abnormal termination dumps possible when using
CP. If the problem program cannot continue, it terminates and in some cases attempts to issue a dump. Likewise, if the operating system for
44 IBM VM/370 System Programmer's Guide