~
~
......
txl
as::
(")
0
::
";:t,
....
'"
~
~
OX
IX
2X
3X
4X
5X
CPU
6X
LOCAL
7X
STORAGE
8X
9X
AX
BX
CX
OX
EX
FX
OX
IX
2X
3X
4X
5X
UCW
6X
LOCAL
7X
STORAGE
8X
9X
AX
BX
CX
OX
EX
FX
2030 LOCAL STORAGE MAP
o
23456 789ABCDEF
G.P. REG.
o
~~A:
I
xl
X+ 11 X+2 FLOATI NG POI NT
R~G
0
1
/
2 1050
'
Use lFLOATING POINT REG 2
3
W'/!I~ CPUI~
4
~*~E
FLOATING
POINT REG
4
5
lEOCS
0 L S V
U G
J
I
6 VII/I///f/, FLOATING POINT REG 6
7
FLOAT I NG PT. MULTIPLY
8
0 1 2
3
4
5
6
7
9 R 9
10 11 12 13 14 15
A 16
17 18 19 20 21
22
23
B
24 2S 26 27 28 29 130 31
C
0
E
CPU WORKING STORAGE
F
UNIT
CONTROL WORD
0
UNIT CONTROL WORD 16
l
17
2
18
3
19
4
20
5
21
6
22
7 23
8
24
9 25
10
26
11
27
12
28
13 29
14 30
15
31
O-MP
I-MP
2-MP
3-MP
4-PS
5-SE
6-SE
7-SE
8-MP
9-10
TO"}
Il-
12-
13-
14-
15-
*1
K ADDRESSABLE
LS BYTES
(1.0,CNO, KO, 1 ,K 1 ,K2, K3)
PARI TY=KP=ODD
K-ADDRESSABLE BYTE UTILIZATION
X lB UN ADDR
X T STORE
X R STORE
X IB UN STATUS
W BIT
&
ILC
L 1 UNIT ADDR
L 1 NXT CCW HI
L 1 NXT CCW LO
X UA TEMP STG
50 USAGE
CPU
WORKING
STORAGE
16-INST CNTR UNAVAIL
17-INST CNTR HI
18-INST CNTR LO
19-HSMX UNIT ADDR K**
20-SEL CHAN R STORE
21-SEL 2 UNIT ADDR }
22-SEL 2 NXT CCW HI **
23-SEL 2 NXT CCW LO
24-SYSTEM MASK
25-STOR PROT
&
MONITOR
26-HSMX UNIT ADDR.
27-COND REG
&
PGM MSK
28-
29-SEL CHAN S STORE
30-SEL CHAN U STORE
31-SEL CHAN V STORE
**TENATIVELY RESERVED FOR
HIGH SPEED MULTIPLEX
CHANNEL (HSMX) (HSMX
MUTUALLY EXCLUSIVE WITH
2ND SEL CHNL)
CPU LS LOCATIONS 34,35,44,45,55,56,66,67 WILL BE USED
BY THE HIGH SPEED MULTIPLEX CHANNEL
FOR THE STORAGE OF NEXT CCW ADDRESSES
PER SUBCHANNEL
Figure A-4 2030 Local Storage Map

List of Abbreviations and Symbols
AC
AI
ALT
ALU
ANSNZ
AP
ASCII
C
CAnn ---+-W
CCROS
CP
F
FA
FB
FI
FT
FWX
GA
GB
GEOG
GMWM
GR
GS
GT
GUV
H
HEX
HZ
INTR
JE
JI
] K
I LOAD
I
LS
I
LZ
1\
MC
1\
MILS
1\
MPX
1\
MS
}.; NP
o
OPI
Address Carry (ALU Carry)
Address In
(1/0
Address)
Alternate
Arithmetic and Logic Unit
Answer Nonzero
Address Parity (ROS Address)
American Standard Code for Information Interchange
Counter for Interval Timer
Gate CA Field to W Register
Card Capacitor Read Only Storage
Control Register Parity
External Interrupt Register
Multiplex Channel Tags Out
Multiplex Channel Tags Out
Multiplex Channel Tags In
Multiplex Channel Tags In
Multiplex Channel Backup RosaI'
Selector Channel Tags Out
Selector Channel Tags Out
Geographic Address in CCROS
Group Mark-Word Mark
Selector Channel Data Register
Selector Channel Tags In
Selector. Channel Tags In
Selector Channel Address Register
Holding Register (Priority)
Hex-a-Decimal
High Z Buss Zero
Interrupt
Direct Data Channel Buss Out
Direct Data Channel Buss In
Constant Generator
Reset
Local Storage
Low Z Buss Zero
Machine Check
Main Storage or Local Storage
Multiplex
Main Storage
Next Address Parity
Operational in
(1/0)
IBM Confident;'l
37
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