110 (See IOEL) machine-check 11-28
address 11-29
validity bit for 11-23
extended-precision floating-point facil­
ity D-3,9-1
extended real addressing
bits in page-table entry 3-26
facility D-3
external call
external interruption 6-11
pending (signal-processor status)
4-41
signal-processor order 4-39
external damage 11-18
subclass-mask bit for 11-28
external-damage code 11-24
assigned storage locations for 3-44
validity bit for 11-22
external interruption 6-10 clock-comparator 4-27,6-11
CPU-timer 4-28,6-11
direct conditions 6-10 emergency-signal 6-11
external-call 6-11
external-signal 6-12
interrupt-key 6-12
interval-timer 4-29,6-12
malfunction-alert 6-12
mask in BC-mode PSW 4-8
mask in EC-mode PSW 4-6
parameter 6-10 assigned storage locations for
3-42
pending conditions 6-10 priority of conditions 6-10 service-signal 6-13
TOD-clock-sync-check 6-13
external mask
bit in BC-mode PSW 4-8
bit in EC-mode PSW 4-6
external secondary report (bit in
external-damage code) 11-24
external signal (external interruption)
6-12
external-signal facility D-3,4-23
externally initiated functions 4-30 EXTRACT PRIMARY ASN (EPAR) instruction 10-6 EXTRACT SECONDARY ASN (ESAR) instruction 10-7 extraction-authority-control bit 5-17
F
facilities D-1
failing-storage address 11-26
assigned storage locations for 3-44
validity bit for 11-22
failure, vector-facility 11-18
fast-release facility (110) D-3,13-27
fetch protection 3-8
bit in storage key 3-6
fetch reference 5-29
access exceptions for 6-30 fetching
handling of invalid CBC in storage
keys during 11-8
of DAT-table entries 5-27
of instructions 5-26
of PSWs during interruptions 5-33
of storage operands 5-29
field 3-3 field separator (in EDIT) 8-7 FIFO (first in first out) queuing, exam-
ple for lock and unlock A-44
fill byte (in EDIT) 8-6
fixed-length field 3-3 fixed logout
assigned storage locations for 3-44
channel 13-80 machine-check 11-28
fixed point
(See also binary)
divide exception 6-20 overflow exception 6-20 flags
mask in BC-mode PSW 4-8
mask in EC-mode PSW 4-7
field-validity (in limited channel
logout) 13-82
in CCW 13-38
significance of 13-49
floating interruption conditions
6-7,11-27
clearing of 4-34
floating point
(See also exponent)
comparison 9-8
conversion
basic example A-7
examples with instructions A-38
data format 9-2
divide exception 6-20 facility D-4
instructions 9-1
examples A-36
numbers 9-1
examples A-5
registers 2-4
save areas for 3-45
validity bit for 11-22
shifting (See normalization)
format
address 3-3 basic sense data (110) 13-51
CAW (channel-address word) 13-37
CCW (channel-command word) 13-38
CSW (channel-status word) 13-62
decimal data 8-1
floating-point data 9-2
general data 7-2 lID-address 13-15 13-15
IDAW (indirect-data-address word)
13-45
information 3-3
instruction 5-3
PSW
in BC mode 4-8
in EC mode 4-6
sense-ID data 13-52
fraction 9-1
conversion of between hexadecimal and
decimal F-7
free-pool manipulation, programming
example A-46
full channel logout 13-80 address of IOEL in 13-80 fixed 13-80 lID-extended (See IOEL) fullword (See word)
Index X-9

G
general instructions 7-2
examples A-8
general registers 2-4
alteration-event-mask bit 4-16
alteration of (PER event) 4-20 PER-mask bits 4-16
save areas for 3-45
validity bit for 11-23
guard digit 9-3
H
halfword 3-3
halfword-concurrent storage references
5-31
HALT DEVICE (HDV) instruction 13-19
termination of I/O operation by
13-57
halt-device facility D-4,13-19
HALT I/O (HIO) instruction 13-23
termination of I/O operation by
13-57
HALVE (HDR,HER) instructions 9-10 example A-38
HDR (HALVE) instruction 9-10 example A-38
HDV (HALT DEVICE) instruction 13-19
header, tracing 4-13
HER (HALVE) instruction 9-10 hexadecimal (hex) representation 5-4
tables F-1 HIO (HALT I/O) instruction 13-23
I
I field of instruction 5-4 I/O (input/output) 2-4,13-2
effect on CPU timer 4-28
effect on interval timer 4-29 I/O address 13-8
assigned storage locations for 3-44
format of 13-15
in channel-status word (CSW) 13-75
in I/O-communication area 13-83
storing of 13-62
validity flags for 13-82
I/O-communication area (See IOCA) I/O device (See device) I/O-error alert (in limited channel
logout) 13-82 I/O extended-logout (See IOEL) I/O instructions 13-15
condition code for 13-12
exception handling for 13-36
format of 13-15
role of in I/O operations 13-5
timeout (bit in external-damage code)
11-25 I/O interface
inoperative 13-82 OEMI publication referenced v
position on (effect on interruption
priority) 13-62 I/O interruption 6-13
action for 13-62
channel-available (See
channel-available interruption)
pending 13-10 priority of 13-62
program-controlled (See PCI) X-10 System/370 Principles of Operation timeout (bit in external-damage code)
11-25
I/O-interruption code 6-14
I/O-interruption conditions 13-7,13-60 I/O mask
in BC-mode PSW 4-8
in EC-mode PSW 4-6 I/O operations 13-2
chaining of 13-40 channel compatibility of 13-7
conclusion of 13-54
execution of 13-37
immediate 13-55
pending 13-27
resumption of 13-26,13-55 start-I/O-fast queuing of 13-28
storage-area designation for (See
storage-area designation for I/O operations) 13-2
suspend-control bit used in suspend­
ing 13-37
suspension of 13-28,13-46
termination of (See termination of I/O operations) I/O-queuing facility D-4 I/O-sense data 13-51 I/O-system reset 13-12
as part of program reset 4-34 as part of subsystem reset 4-34
effect on channel set 4-43 I/O-system state 13-9
available (AAA) 13-10 channel not operational (NXX) 13-12
channel working (WXX) 13-11
device not operational (AAN) 13-11
device working (AAW) 13-10 interruption pending in channel (IXX)
13-11
interruption pending in device (AAI) 13-10 interruption pending in subchannel
(AIX) 13-11
subchannel not operational (ANX)
13-11
subchannel working (AWX) 13-11 lAC (INSERT ADDRESS SPACE CONTROL) instruction 10-7 IC (INSERT CHARACTER) instruction 7-20 IC (instruction counter) (See instruc­
tion address) ICM (INSERT CHARACTERS UNDER MASK)
instruction 7-20 examples A-19
ID (See CPU identification, channel
identification, sense ID)
IDA (indirect-data-address) flag 13-38
IDAW (indirect-data-address word) 13-45
format 13-45
31-bit facility D-5,13-46 ILC (instruction-length code) 6-7
assigned storage locations for 3-43
for program interruptions 6-14
for supervisor-call interruption
6-36
in BC-mode PSW 4-8
IML (initial microprogram loading)
controls 12-2
immediate I/O operation 13-55
immediate operand 5-4
implicit address translation 3-27
impljcit tracing 4-11
imprecise program interruptions 6-7
incorrect length (channel status) 13-70 index