IBM System/370 145 Reference Summary page 67

Addressmg
~
_ I
Shared CU
1f
256 UCSs)
lo
Shared CU
Add'
Address mg
IQ
ICU)
31
(DEVI
71
314
L
Depends on UCW Capacity
0000 - 16 UCWs
OOOX 32 UCWs
OOXX • 64 UCWs
OXXX • 128 UCWs
XXXX - 256 UCWs
(CUI
Column A B
ID
00
10
01 11
..
02 12
03 13
~
04
14
"'
05 15
0
06 lS
0
" 07 17
~
08 18
~
OS 19
OA lA z
OB lB
~
oc
lC
OD 1D
OE lE
OF lF
Column A B
ID
16 UCWs,any
other address A
up to 7F folds
into A
32 UCW s, any other
address up to 7F
folds mto A or B
c
20
21
22
23
24
2S
26
27
28
29
2A
2B
2C
2D
2E
2F
c
A
A
314
0
I
0
1
I
3 4 .
D E F
30 40 50
31 41 51
32
42
52
33
43
53
34 44 54
3S
4S
SS
36 4S S6
37 47 S7
38
48
SS
39 49 S9
3A 4A SA
38 4B SB
3C 4C SC
3D 4D SD
3E 4E SE
3F
4F SF
D E F
A A A
B A B
64 UCW s, any other address up to
7F folds mto A, B, C, or 0 A
B
128 UCW s, no address folding
266 UCW s There are 256 unique UCW addresses
71
G
60
61
S2
S3
64
6S
66
67
68
S9
6A
6B
6C
SD
6E
SF
G
A
A
c
II
Format
cs
I
Byte2
j
Worn Address
Byte 0 !!:£!!!
1
.!!:Lte3
1
EXXO Flag and Ops
UCW/Chan
l
CountH1
Count Lo
Stat
2 EXX4 Koy Data Address
3 EXXB
Koy
Next CCW Address
4
EXXC
Dev Addr
Not Used
Flags and Ops UCWStatus Channel Status
H
70
71
72
73
74
7S
7S
77
78
79
7A
7B
7C
7D
7E
7F
H
A
B
D
DataChammg Active Bit PCI
Cmd Chammg
IL IL
Prog Check
Prog Check
Skip
or
Status Next Prat Check Prot Check
PCI Status Queued Chan Data Ck
Reserved
Chan Control Ck Chan Ctrl Ck
(1) Output (0) Input Int Ctrl Check lntCtrt Ck
(1) Decrem (0) lncrem
Flags and Ops Bits 3 and 6
UCW Status Brts 4 and 7
811
.!!..~
I
80
81
8
82
83
;:
u
64
~
SS
•
86
a
87
•
88
~
89
i
SA
"
SB
J
SC
80
SE
SF
I
811 3 6 Specify
Q Q Input
0
s:
u
~
•
a
=
• •
~
'
0 1 Output
1 0 Status Next
or Skip
1 1 Stopor
Count Zero
J K
90 AO
91 A1
92
ill
A2
8
93 A3
s: ;:
94 u A4 u
9S
~
AS
~
a
E
96 A6
li
97 A7
98
i
AS
I
99
•
A9
9A
~
AA
i
9B AB
"
~ ~
9C AC
90 AD
9E AE
9F AF
J K
L
BO
Bl
B2
B3
B4
B5
B6
B7
BS
B9
BA
BB
BC
BO
BE
BF
L
M
co
C1
:!!
C2
i!!
C3
;: ;:
!l
C4
u
cs
~
i
a
C6
C7
cs
I
C9
i
CA
:g
"
CB
"
~
'
cc
CD
CE
CF
M
0 0 Handhng Data
O 1 Status Next
1 0 Status Stacked
1 1 18 Full
N
a p
DO EO FO
D1 El Fl
D2
g
E2
B
F2
D3 E3 F3
;:
s:
D4
u
E4
u
F4
OS
~
ES
~
FS
! 1
DS
ES F6
07 E7 F7
DB
I
ES
j
FS
:
09 E9 F9
DA
~
EA FA
DB EB FS
~
•
DC EC J! FC
DD
ED
,_
FD
DE
EE FE
OF EF FF
N 0
p
When there are 128 UCW s or less, the columns of addresses above are re-
served for shared UCW addressing The note m bold type relates the column
of addresses to the correct UCW
No folding permitted No shared unn addresses All valid unshared
·-
c
~
l>
0
0
:D
m
Cl)
!:!?
2
G)
~
CD
,..
m