PHYS 2411 (1998): Character Definitions

Binary Representation of Selected 8-bit Integers
Integer [byte]	Binary	HEX	ASCII equivalent	EBCDIC equivalent	If bgcolor = HEX
Integer [byte]	Binary	HEX	ASCII equivalent	EBCDIC equivalent	R	G	B	RGB
0	0000 0000	00	CTRL-@ [NUL]	---	000000	000000	000000	000000
1	0000 0001	01	CTRL-a [SOH]	---	010000	000100	000001	010101
2	0000 0010	02	CTRL-b [STX]	---	020000	000200	000002	020202
3	0000 0011	03	CTRL-c [ETX]	---	030000	000300	000003	030303
4	0000 0100	04	CTRL-d [EOT]	---	040000	000400	000004	040404
5	0000 0101	05	CTRL-e [ENQ]	[Horiz. Tab]	050000	000500	000005	050505
6	0000 0110	06	CTRL-f [ACK]	[Lower Case]	060000	000600	000006	060606
7	0000 0111	07	CTRL-g [BEL]	[DEL]	070000	000700	000007	070707
. . .	. . .	. . .
127	0111 1111	7F	DEL [Delete]	" [Double Quote]	7F0000	007F00	00007F	7F7F7F

Binary Representation of Selected 8-bit Integers
Integer [byte]	Binary^*	HEX	ASCII equivalent	EBCDIC equivalent	If bgcolor = HEX
Integer [byte]	Binary^*	HEX	ASCII equivalent	EBCDIC equivalent	R	G	B	RGB
-128	1000 0000	80	---	---	800000	008000	000080	808080
. . .	. . .	. . .
-8	1111 1000	F8	---	8	F80000	00F800	0000F8	F8F8F8
-7	1111 1001	F9	---	9	F90000	00F900	0000F9	F9F9F9
-6	1111 1010	FA	---	---	FA0000	00FA00	0000FA	FAFAFA
-5	1111 1011	FB	---	---	FB0000	00FB00	0000FB	FBFBFB
-4	1111 1100	FC	---	---	FC0000	00FC00	0000FC	FCFCFC
-3	1111 1101	FD	---	---	FD0000	00FD00	0000FD	FDFDFD
-2	1111 1110	FE	---	---	FE0000	00FE00	0000FE	FEFEFE
-1	1111 1111	FF	---	---	FF0000	00FF00	0000FF	FFFFFF
^*All of the integer data types in Java [byte, short, int, long] are "signed two's complement integers." This means that the integer minus one (-1) is represented by setting all binary bits to "1" (for example, for the "byte" data type illustrated in this table, the binary representation of minus one is 1111 1111) then all other negative integers are obtained by subtracting 1 from the previous negative number, in succession. With this "two's complement" convention: The highest order (left-most) binary bit of every negative integer is "1"; The magnitude of any negative integer can be obtained by first subtracting 1 from the binary representation of the number, then changing each 0 in the binary number to 1 and each 1 to 0. The magnitude of the largest negative integer is 2^n-1, where "n" is the number of bits in the integer data type (hence, -128 is the largest negative integer that can be represented by a Java "byte"). The largest positive integer is (2^n-1 - 1), where "n" is the number of bits in the integer data type (hence, +127 is the largest positive integer that can be represented by a Java "byte").

PHYS 2411 COMPUTATIONAL SCIENCE I

PHYS 2411
COMPUTATIONAL SCIENCE I