FIXED
STORAGE LOCATIONS
Area, Hex
EC
dec,
addr
only Function
0- 7 0 Initial program loading
PSW,
restart new
PSW
8-
15
8 Initial program loading CCW1, restart old
PSW
16-
23
10
Initial program loading
CCW2
24- 31
18
External old
PSW
32-
39
20
upervisor Call old
PSW
40-
47
28
Program
old
PSW
48-
55
30
Machine-check old
PSW
56-
63
38
Input/output
"Id
PSW
64-
71
40
Channel status word
C.ee
diagram)
72-
75
48
Channel address word (0-3 key, 4-7 zeros, 8-31 CCWaddress]
80-
83
50
Interval timer
88-
95
58
External new
PSW
96-103
60
Supervisor
Call
new
PSW
104-111 68 Program new
PSW
112-119
70
Machine-check new
PSW
120-127
78
Input/output
new
PSW
132-133 84
CPU
address
8SSQC'd
with external intlllTuption,
or
unchanged
132-133
84 X
CPU
address assoc'd with external interruption,
or
zeros
134-135
86
X External interruption code
136-139
88 X SVC interruption (0-12 zeros,
1~141LC,
15:0, 16-31
code]
140-143
8C X Program interrupt. (0-12 zeros,
1~141LC,
15:0,16-31
code]
144-147
90
X Translation exception address (0-7 zeros, 8-31 address]
148-149
94
Monitor class (0-7 zeros, 8-15 class number]
150-151 96 X PER interruption
code
(0-3 code, 4-15 zeros]
152·155
98 X PER address (0-7 zeros, 8-31 address]
156-159
9C Monitor
code
(0-7 zeros, 8-31 monitor code]
168-171 A8
annelID
(0-3type,4-15model,I6-31
max.IOELlength]
172·175
AC
I/O
extended
logout address (0·7 unused, 8-31 address]
176-179
BO
Limited channel logout (see diagram)
lB5-187
B9 X I/O address (0-7 zeros, 8-23 address]
216-223
DB
PU
timer save area
224-231
EO
lock comparator save area
232-239 E8 Machine-check interruption code (see diagram)
248-251
FB
Failing processor storage
address
(0-7 zeros, 8-31 address]
252-255 FC Region
code'
256-351
100
Fixed logout
area'
352-383
160
Fl08tin!l"point register
save
area
384-4471180
1
~neral
register
SIMI
area
448-511 lCO ntrol register
save
area
512t
200
CPU
extended
logout area (size varies)
'*May
vary
among
modelSj
see
system
library
manuals
for
specifiC
model.
tLocation
may
be chilnged bY
programming
(bits
8-28
of
CR
15
specify
address).
5 Channel
6 Main storage control
7 Main storage
8 CPU
9 Channel
10
Main storage control
11
Main storage
12
13 15
16
12 Control unit
16 I nterface address
17·18 Reserved (00)
19
Sequence code
20
Unit status
21
Cmd. addr.
anO
key
22
Channel address
23
Device address
23 24 26
2829
31
24-25
Type
of
termination
00
I nterface disconnect
01
Stop, stack
or
normal
10
Selective reset
11
System reset
28(A) I/O
error
alert
29-31 Sequence code
MACHINE-CHECK INTERRUPTION CODE (hex
E81
Page
2·14
Val
iditv indicators
MCEL length
55
1
56
24
Fail
ing
stg. address
25
Region code
27 Floating-pt registers
28
General registers
29
Control registers
30
CPU
ext'd
logout
31 Storage logical
46
CPU
timer
47 Clock
comparator
31
63
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