among
System/310
models
and
is
processed
by
recovery
management
routines.
The
fixed
logout
area
data
indicates
the
reason
for
the
interrupt
in
the
machine
check
code.
The
save
areas
in
the
logout
area
preserve
the
status
of
the
system
at
the
time
of
the
machine
check
interrupt
and
contain
the
contents
of
the
general
purpose.
the
floating-
point,
and
the
control
registers.
The
model-dependent
CPU
extended
logout
area
begins
at
the
address
specified
in
control
register
15,
which
is
set
to
decimal
location
512
by
an
IPL
or
on
a
system
reset.
The
length
of
this
extended
logout
area
on
the
Model
165
is
approximately
1000
bytes.
The
occurrence
of
a
logout
to
the
CPU
extended
logout
area
is
determined
by
the
setting
of
two
extended
logout
mask
bits
in
control
register
14.
An
extended
logout
can
occur
after
a
CPU
error
and
when
a
hard
machine
check
interrupt
takes
place.
This
data
can
be
recorded
by
recovery
management
routines
and
the
Processor
Logout
Analysis
program
can
be
used
to
process
this
information
at
a
later
tiroe.
Decimal
locations
0
IPL
PSW
FIXED
AREA
8
IPL
CCW
1
0-127
16
24
IPL
CCW
2
• Model independent among
External
old
PSW
System/360 and System/370
32
SVCold
PSW
models except
for
PSW
bit
12
40
48
Program
old
PSW
•
Processed
by
the
Machine check
old
PSW
control program
56
I/O
old
PSW
64
Channel status
word
-
CSW
72
Channel address
word
- CAW
I
76
Unused
80
Interval
timer
I
84
Unused
88
External new
PSW
96
SVC new
PSW
104
Program new
PSW
112
Machine check new
PSW
120
I/O
new
PSW
""I.-
128 128 167 Unused
....
L..
-
168
1
ChannellD
172
I/O
extended log pointer T
176
~--------------------1-7-6---23L-1-u-n-u-sed--------~~------~;l~---F-I-X-E-D-L-O-G-O-U-T--A-R-E-A--------
2321
Machine check code
T;~
76 -
511
240 J:t--------------------------------------------------f:i •
Layout
is
model independent
256
1""
240 - 255 Unused
::r
S t
/370
d I
,J:"
;:L among ys
em
mo e s.
1
Used
to
store status data
for
CPU
retry
operations Fields and bits used vary slightly
352
Xx
b d I
Floating
point
register
save
area
y mo e
11-------------------------------------------------;
• Always logged
on
a
384
1
General purpose register
save
area
;r machine check
interrupt
448;.. Control register
save
area
; .Processed
by
RMS
512
I------------------------------------------------~~--------~-----------------
CPU
Extended logout - 1000 bytes
(Pointer in
control register
15
set
to
512 at IPL
or
system reset)
1511
~----------------------------------------------~
CPU
EXTENDED
LOGOUT
AREA
• Model dependent
• Logged
on
all hard machine
checks and
first
and seventh
CPU
retry
if
not
disabled
•
Processed
by
Logout
Analysis Program
Figure
50.10.3.
Model
165
fixed
storage
locations
15
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