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contains
0111 0101,
which is the speci-
fication·for registers 7 and 5.
The
G-registercontains
0001 1010,
the Op
code.
The S3 bit is set to a
1,
all
other positions of the S register are
still zero.
ADDRESS
011D:
Before any data from the
general purpose registers can be added,
the micro program must set up the units
. address of each register.
The address
for the low-order byte of general pur-
pose register 5 is set up by the expres-
sion DXH
+
KL->V.
See Figure 3-24.
To
address the low-order byte, the
N-
register must be set to:
LOCAL
STORAGE
MPX 0
STORAGE
o
2
3
4
5
6
7
Reg
5
Byte 3
0101
0011.
In the expression DXH
+
KL->V, consider
the DXH portion first.
The A-register
input of ALU is set with the data from
the D-register.
The data in the A-
register is now:
8
9
A
S
C
o
E
F
Floating Point Reg. 0
Sense
I
1
ox
G.P. Reg. 0
Syte
I
X
X+I
X+2
IX
(--------,I~--~~'=====I=~~O=U=re====~/~-----------------------------!
2X 1-------:-2----v77'?'77777771
Floating Point Reg. 2
3X
1-_ _ _ _
3 _ _
-I'0 ....
@6M0~@ .... @6M~~
CPU
~
Store
4X
4
5X 1-----'1_--L1--::;.5_-'--1---I
Ef~
I
J
G
U
V
L O S
6X
6
~~~~~9~~~~~~~7.~*-~L-~~F~lo~a~tin~g~P~oi~nt~R~egL.~6-L~-L~~
Floating Point Reg. 4
7X
1 - - - J
1
L ...---J
1
L ...-
7
--J
1
L ...--I
Floating Point Multiply
6
7
8X 1--________ 8 ____
___1
0
1
2
3
4
5
9X 1--________ 9:--__
___1
8
9
10
11
12
13
14
15
AX
A
16
17
18
19
20
21
22
23
r-------------~
SX 1--______ ----'S ____
___1
24
25
26
27
28
29
30
31
CX 1--________ C ____
___1
OX
1--________
0 ____
---1
CPU Working Storage
EX
E
r-------------~
FX I -_________ F ____
~
______
~
______
~~------------------------------~
OX
r----------'----'----'----'----'~------'--~----~----'----'----'----'------___1
Unit Control Word
0
Unit Control Word
16
IX 1--_ _ _ _ _ _ _ _ _ _ _ _ _ _ ----' _ _ _
~---------------___1
1
17
2X
r----------------4----------------~
3X
r----------------4----------------~
2
18
3
19
4X
4
20
r----------------4----------------~
5X I--_ _ _ _ _ _ _ _ _ _ _ _ _ _ _
~-------------:__-~
6X I--_ _ _ _ _ _ _ _ _ _ _ _ _ _ _
~----------------~
7X I--_ _ _ _ _ _ _ _ _ _ _ _ _ _ _
~---------------~
5
21
6
22
7
23
8X
r----------------4----------------~
8
24
9X I--_ _ _ _ _ _ _ _ _ _ _ _ _ _ _
~------------__=_:__-~
AXr-_ _ _ _ _ _ _ _ _ _ _ _ _ _ _
4-________________________
~
9
25
10
26
~ I------------------------~----'----~------------------------=----'--~
CX I--_________________________
~-----------------------__=_:__--~
OXI--______________
~
_ _
~--------------__=_--~
EX I--_ _ _ _ _ _ _ _
~
_ _ _
~
___
~----------------~--------~
FX
~
________________________
~
____
~
______________________________
~
·11
27
12
28
13
29
14
30
15
31
Figure 3-24.
Auxiliary Storage Map
3-28
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