Channel Indirect Data Addressing - IBM System/370 145 Manual

model-dependent area is not affected
by
whether BC or EC mode is
specified, except for locations 185 to 187, which contain the I/O
address for an I/O interruption and an IPL only when the Model 145 is in
EC mode.
The machine check interruption procedure and the format of the data
10gged on a machine check (discussed in Section 50) are the same in EC
and BC modes, except for differences in the PSW format and the
permanently assigned locations previously discussed.
Bit
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
11
18
19
20
21
22
23
24
.~
~~
30
31
32
33
34
35
36
:rl
38
39
40
41
42
I..
r
Be
MODE
psw
FORMAT
Content
Channel 0 mask
Channel 1 mask
Channel 2 mask
Channel 3 mask
Channel 4 mask
Channel 5 mask
I/O mask
External mask
Protect key
1
EC/BC mode (0 is BC)
Machine check mask
Wait/running state
Problem/supervisor state
Interruption code
I
Instruction length code
,.
Condition code
T
Program mask
!
I nstruction address
:~
"'"
r
System
mask
EC MODE PSW FORMAT
Bit
Content
0 0
1
PER mask
2
0
3 0
4
0
5
Translation mode (OAT feature mask)
6
1/0 summary mask
- -
7
External summar.". mask
8 Protect key
9
l
10
11
12
EC/BC mode (1 is ECI
13 Machine check mask
14
Wait/running state
15
problem/supervisor state
16
0
17
0
18 iondition code
19
20
Program mask
21 t
22
23
24
0
~~
~:::
,.,
' "
30
31
32
0
33
j
34
35
36
37
38
39
40
I nstruction address.
41
42
,L"
,,,
,L"
1
~I
j
I
System
mask
Figure 10.10.1. BC and EC mode PSW formats
16
A Guide to the IBM System/370 Model 145