B&B Electronics Parallel Port Input/Output Converter PPIO Benutzerhandbuch
PPIO2899 Manual
B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104
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PPENDIX
Hexadecimal Numbers
Hexadecimal numbers are base-16 numbers. Instead of only
using the digits "0" through "9" to represent a number, the letters "A"
through "F" are also used. Table 3 shows the value of the individual
digits in the hexadecimal numbering system. When we write a
hexadecimal number we add an upper or lower case "H" to the end
of it to indicate that it is a hexadecimal number. Table 4 can be used
to convert a number between 0 and 255 into its hexadecimal
representation. Let us use 90 as an example. Find 90 in the middle
of the table. The "5" on the left side of the row containing 90 will be
the first digit of our number. The "A" on the top of the column
containing 90 will be the second digit. All we have to do now is add
an "H" the end of the number. So the hexadecimal representation of
90 is "5Ah".
through "F" are also used. Table 3 shows the value of the individual
digits in the hexadecimal numbering system. When we write a
hexadecimal number we add an upper or lower case "H" to the end
of it to indicate that it is a hexadecimal number. Table 4 can be used
to convert a number between 0 and 255 into its hexadecimal
representation. Let us use 90 as an example. Find 90 in the middle
of the table. The "5" on the left side of the row containing 90 will be
the first digit of our number. The "A" on the top of the column
containing 90 will be the second digit. All we have to do now is add
an "H" the end of the number. So the hexadecimal representation of
90 is "5Ah".
Table 3
Value
Hexadecimal
Binary
0
0
0000
1
1
0001
2
2
0010
3
3
0011
4
4
0100
5
5
0101
6
6
0110
7
7
0111
8
8
1000
9
9
1001
10
A
1010
11
B
1011
12
C
1100
13
D
1101
14
E
1110
15
F
1111