Slide 3.3: Binary numbers Slide 3.5: Hexadecimal integers Home

Integer Storage Sizes

Storage Type	Bit Number	Range (Low – High)	Powers of 2
Unsigned byte	8	0 [(00000000)2] to 255 [(11111111)2]	0 to (28 – 1)
Unsigned word	16	0 to 65,535	0 to (216 – 1)
Unsigned doubleword	32	0 to 4,294,967,295	0 to (232 – 1)
Unsigned quadword	64	0 to 18,466,744,073,709,551,615	0 to (264 – 1)

kilobyte (KB)	210 bytes		megabyte (MB)	220 bytes		gigabyte (GB)	230 bytes
terabyte (TB)	240 bytes		petabyte (PB)	250 bytes		exabyte (EB)	260 bytes

Hexadecimal Integers

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Large binary numbers are cumbersome to read, so hexadecimal digits are usually used by assemblers and debuggers to represent binary data.

Decimal (base 10)	Binary (base 2)	Octal (base 8)	Hexadecimal (base 16)		Decimal (base 10)	Binary (base 2)	Octal (base 8)	Hexadecimal (base 16)
00	0000	00	0		08	1000	10	8
01	0001	01	1		09	1001	11	9
02	0010	02	2		10	1010	12	A
03	0011	03	3		11	1011	13	B
04	0100	04	4		12	1100	14	C
05	0101	05	5		13	1101	15	D
06	0110	06	6		14	1110	16	E
07	0111	07	7		15	1111	17	F

For example, the binary number: (10110001101011)2 is represented by a hexadecimal number:

Binary Number:   (10110001101011)2	10	1100	0110	1011
Hexadecimal Number:   ( )16