DYNAMIC ADDRESS TRANSLATION
VIRTUAL (LOGICAL) ADDRESS FORMAT
Segment
Size
64K
64K
1M
1M
Page
Size
4K
2K
4K
2K
[
Bits
J
0-7
are
ignored
Segment
Index
8-15
8
-15
8
-11
8-11
Page Index
16-19
16-20
12-19
12
-20
Byte Index
20-31
21
-31
20-31
21
- 31
SEGMENT TABLE ENTRY
Page
table address
'Normally
zeros; ignored
on
some
models.
28:2931
31
(I)
Segment-invalid bit.
PAGE TABLE ENTRY (4K) PAGE TABLE ENTRY
12K)
l Page address
j~11~0
f{!
'0
Page address
III°F,A
12131415
12
(I)
Page-invalid bit.
13
(I)
Page-invalid bit.
HEXADECIMAL
AND
DECIMAL CONVERSION
From
hex:
locate
each
hex
digit
in
its
corresponding
column
position
and
note
the
decimal equivalents.
Add
these
to
obtain
the
decimal value.
From
decimal:
(1)
locate
the
largest decimal value in
the
table
that
will fit
into
the
decimal
number
to
be
converted.
and
(2)
note
its hex equivalent
and
hex
column
position. (3)
Find
the
decimal remainder. Repeat
the
process
on
this
and
subsequent
remainders.
6
Note: Decimal, hexadecimal, (and binary) equivalents
of
all
numbers
from 0
to
255
are listed on panels 9 - 12.
HEXADECIMAL COLUMNS
5 4
3
2
1
HEX
=
DEC
HEX
=
DEC
HEX
=
DEC
HEX
=
DEC
HEX=
DEC
HEX=
DEC
0
0 0
0 0 0
0 0
0
0
0 0
1
1,048,576
1
65,536
1
4,096
1
256
1
16
1 1
2
2,097,152
2
131,072
2
8,192
2
512
2
32
2
2
3
3,145,728
3
196,608
3
12,288
3
768
3
48
3
3
4
4,194,304
4
262,144
4
16,384
4
1,024
4
64
4
4
5
5,242,880
5
327,680
5
20,480
5
1,280
5
80
5
5
6
6,291,456
6
393,216
6
24,576
6
1,536
6
96
6
6
7
7,340,032
7
458,752
7
28,672
7
1,792
7 112
7
7
8
8,388,608
8
524.288
8
32,768
8
2,048
8
128
8 8
9
9,437,184
9
589.824
9
36,864
9
2.304
9
144
9
9
A
10,485,760
A
655,360
A
40,960
A
2.560
A
160
A
10
B
11,534,336
B
720,896
B 45,056 B
2.816
B
176
B
11
C
12,582,912
C
786,432
C
49,152
C
3,072
C
192
C
12
D
13,631,488
D
851,968
D
53,248
D
3,328
D
208 D
13
E
14,680,064
E
917,504
E
57,344
E
3,584
E
224
E
14
F
15,728,640
F
983,040
F
61,440
F
3,840
F
240
F
15
0123
4567
0123
4567
0123
4567
BYTE
ByTE
BVTE
POWERS
OF
2
POWERS
OF
16
2
n
n
2iJ
=
160
I
16
n
n
256
8
:z4
=
16
1
1
0
512
9
2
8
=
162
11>
1
1024
10
212 = 163
256
2
2048
11
2
16
=
16
4
4096
3
4096
12
2
20
=
16
5
65536
4
8192113
224
=
166
1048576
5
16384
14
2
28
=
16
7
16777216
6
32768
15
2
32
=
16
8
268435456
7
65536
16
4294967296
8
131072
17
2
36
=
16
9
68
719476736
9
262144
18
:z4O
=
16
10
1
099
511
627 776
10
524288
19
:z44
=
16
11
17
592
186
044
416
11
1048576
20
:z48
=
1612
261474976710656
12
2097152
21
2
52
=
16
13
4
503
599
627
370
496
13
4194304
22
2
56
=
16
14
72
057
594
037
927
936
14
8388608
23
~o=
1615
1
152921504
606
846
976
15
16777216
24
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