MCH (machine check handler) 1-149
attached processor 1-114
control registers 1-152
overview 1-150 recovery
functional 1-151
operator-initiated restart 1-151
system 1-151
system repair 1-151
subroutines 1-152
buffer error 1-151
initial analysis 1-153
main storage analysis 1-154
operator communication 1-155
recovery facility mode switching
1-155
soft recording 1-156
storage protect feature (SPF) analysis 1-154
termination 1-151
virtual user termination 1-155
uncorrectable errors 1-111 MICBLOK, assist control field, control of ECPS 1-409 mini IOBLOK 1-93
minidisks 1-6 mode, VS1 nonpaging 1-44 module entry points for CP commands 1-229,1-403 modules data areas 1-80,1-81 executable
pageable 1-81
resident 1-80 pageable
conventions 1-80 restrictions 1-80 system support 1-19
module-to-label cross-reference, CP 1-251 MONITOR interrupt processing 1-185 MSS support 1-423
annotated flow diagram generate channel program prefix for CMS I/O 1-425
generate channel program prefix for 3330V 1-425
logon user having a 3330V as a
dedicated 3330V 1-424
logon user with minidisk on unmounted
system volume 1-423
process attention interrupt from a 3330V 1-426
process DIAGNOSE code X'18' 1-424
process staging adapter cylinder
fault 1-425 DIAGNOSE instruction 1-11
multiprogramming, controlling 1-132 N non-I/O, privileged instruction 1-41
nucleus, loading of 1-208 o
obtaining a page of free storage 1-203 options
performance
affinity 1-34
favored execution 1-30,1-135 locked pages 1-28
priority 1-32
reserved page frames 1-29,1-32 virtual=real 1-5,1-29,1-32,1-110 virtual machine 1-30 order seek queuing 1-95 OS lSI!, handling by D!KIS!TR 1-81
output
processing
real spool files 1-142
virtual spool files 1-140 output files, virtual machine, closing of
1-216
overhead, CP, reducing for I/O 1-21 P page
exceptions, effects of 1-21
faults, pseudo, with VB/VS Handshaking
feature 1-43 frames 1-5
allocation in free storage 1-122
reserved 1-5,1-29 management 1-203 of free storage
locking 1-203 obtaining 1-203 returning 1-203 unlocking 1-203 request, processing of 1-203 selection 1-20 tables 1-5
shadow 1-118
virtual 1-118
virtual storage
locking 1-20,1-28 reading 1-204 releasing 1-53,1-201 writing 1-204 zero, restrictions 1-5
pageable
control program, executing 1-18 CP modules conventions 1-80 restrictions 1-80 executable modules 1-81
1-432 IBM VM/370 System Logic and Problem Determination Guide

paging 1-5
address translation 1-20 backing store allocation algorithm
1-115 by demand 1-5
considerations 1-27
cylinder selection 1-116
device selection 1-115
first-level storage 1-117 I/O 1-113 I/O request queuing algorithm 1-116 I/O scheduler 1-206 lock page 1-20 page selection 1-20,1-115
page selection routine support 1-116
replacement and selection algorithm <II 4411 1- I I It requests 1-105 second-level storage 1-117
shadow tables 1-5
subsystem 1-114
third-level storage 1-118
virtual storage, error recovery 1-116 password suppression 1-51
P12 program function key, defining function
of 1-65
performance 1-25
options
affinity 1-34
favored execution 1-30,1-135
locked pages 1-28
priority 1-32
reserved page frames 1-29,1-32
virtual=real 1-5,1-29,1-32,1-110
virtual machine 1-30 pointer list
fullwords in 1-411 ftICBLOK 1-411
virtual machine 1-411
preferred virtual machine 1-30 printer, real, spooling to 1-218 priority of execution
i option
1-4,1-32
privilege classes 1-9
privileged instruction I/O 1-46,1-85
non-I/O 1-47
program interrupt 1-46
simulation 1-3,1-25 problem state, SVC interrupts 1-183
processing
accounting records 1-144
spool files
real input 1-143
real output 1-142
virtual input 1-141
virtual output 1-140 virtual input 1-217
virtual output 1-216
processor
attached, affinity 1-34
resources 1-11
retry quiet mode 1-156
retry recording mode 1-156 System/370, retry 1-151
utilization 1-11
program
interrupt 1-46
privileged instruction 1-46
processing 1-188
interruption 1-19
states 1-10 Program Status Word (program Status Word» programming, remote 3270 1-97 protection, fetch storage 1-78
pseudo timer 1-53 PSW (Program Status Word), validation
1-214 punch, real, spooling to 1-218
purging, discontiguous saved segment 1-68
Q
queue 1, dispatching virtual machines from 1-11
queue 2, dispatching virtual machines from 1-11
queuing IOBLOK 1-95
order seek 1-95
quiet mode, processor retry 1-156
Q1 queue 1)
Q2 queue 2)
R
read header message, data format 1-104 read IIO program 1-102 read interruption, I/O program 1-103 read repeat, I/O program 1-102 read text message, data for.at 1-104 reading, a D1SD page from virtual storage 1-204 real
address 1-24
device
attaching 1-125
spooling com.ands 1-146
input device, spooling to 1-219
spooling 1-22
real spooling manager (DftKBSP) 1-142
real storage
allocation 1-203 exa.ine 1-51 management 1-106,1-138 optimizing use of 1-5
page management 1-203 requests for page frames 1-108 Index 1-433