Difference between revisions of "Byte"
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| − | + | A '''byte''' is a collection of eight bits (a binary value of 0 or 1) or two nybbles. A nybble is represented by single digit from 0 to F (sixteen numbers, thus [[hexadecimal]]). As such, bytes are represented by a two-digit number from 00 to FF (totalling 256 possible values). | |
| − | + | There are two bytes in a word and four bytes in a double-word (or long word). Additionally, 1024 bytes make a kilobyte, 1024 kilobytes make a megabyte, 1024 megabytes make a gigabyte, 1024 gigabytes make a terabyte, etc. | |
| − | [[Category: | + | |
| + | ==Units== | ||
| + | ;Bytes | ||
| + | *1024 bytes = 1 KB (kilobyte) | ||
| + | *1024 KB = 1 MB (megabyte) | ||
| + | *1024 MB = 1 GB (gigabyte) | ||
| + | *1024 GB = 1 TB (terabyte) | ||
| + | |||
| + | ;Bits | ||
| + | *1024 bytes = 1 KBit (kilobit) | ||
| + | *1024 KBits = 1 MBit (megabit) | ||
| + | *1024 MBits = 1 GBit (gigabit) | ||
| + | *1024 GBits = 1 TBit (terabit) | ||
| + | |||
| + | ;Conversion | ||
| + | *8 bits = 1 byte | ||
| + | *8 KBits = 1 KB (kilobyte) | ||
| + | *8 MBits = 1 MB (megabyte) | ||
| + | *8 GBits = 1 GB (gigabyte) | ||
| + | *8 TBits = 1 TB (terabyte) | ||
| + | |||
| + | ==Examples== | ||
| + | * Nybbles represent single [[pixel]]s in [[Mega Drive]] graphics. | ||
| + | * Bytes represent ASCII characters. | ||
| + | * Words represent one color in a Mega Drive [[palette]]. | ||
| + | * Double-words are used as absolute pointers in Mega Drive programming. | ||
| + | |||
| + | ==Bandwidth== | ||
| + | Bandwidth is the rate at which data is transferred, typically expressed in bytes per second: | ||
| + | |||
| + | *1 KB/s = 1000 bytes/sec | ||
| + | *1 MB/s = 1000 KB/s | ||
| + | *1 GB/s = 1000 MB/s | ||
| + | *1 TB/s = 1000 GB/s | ||
| + | |||
| + | Bandwidth (or [[wikipedia:Bitrate|bitrate]]) can also be expressed in bits per second: | ||
| + | |||
| + | *1 Kbps = 1000 bits/sec | ||
| + | *1 Mbps = 1000 Kbps | ||
| + | *1 Gbps = 1000 Mbps | ||
| + | *1 Tbps = 1000 Gbps | ||
| + | |||
| + | [[Category:Technical information]] | ||
Latest revision as of 11:31, 26 September 2020
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A byte is a collection of eight bits (a binary value of 0 or 1) or two nybbles. A nybble is represented by single digit from 0 to F (sixteen numbers, thus hexadecimal). As such, bytes are represented by a two-digit number from 00 to FF (totalling 256 possible values).
There are two bytes in a word and four bytes in a double-word (or long word). Additionally, 1024 bytes make a kilobyte, 1024 kilobytes make a megabyte, 1024 megabytes make a gigabyte, 1024 gigabytes make a terabyte, etc.
Units
- Bytes
- 1024 bytes = 1 KB (kilobyte)
- 1024 KB = 1 MB (megabyte)
- 1024 MB = 1 GB (gigabyte)
- 1024 GB = 1 TB (terabyte)
- Bits
- 1024 bytes = 1 KBit (kilobit)
- 1024 KBits = 1 MBit (megabit)
- 1024 MBits = 1 GBit (gigabit)
- 1024 GBits = 1 TBit (terabit)
- Conversion
- 8 bits = 1 byte
- 8 KBits = 1 KB (kilobyte)
- 8 MBits = 1 MB (megabyte)
- 8 GBits = 1 GB (gigabyte)
- 8 TBits = 1 TB (terabyte)
Examples
- Nybbles represent single pixels in Mega Drive graphics.
- Bytes represent ASCII characters.
- Words represent one color in a Mega Drive palette.
- Double-words are used as absolute pointers in Mega Drive programming.
Bandwidth
Bandwidth is the rate at which data is transferred, typically expressed in bytes per second:
- 1 KB/s = 1000 bytes/sec
- 1 MB/s = 1000 KB/s
- 1 GB/s = 1000 MB/s
- 1 TB/s = 1000 GB/s
Bandwidth (or bitrate) can also be expressed in bits per second:
- 1 Kbps = 1000 bits/sec
- 1 Mbps = 1000 Kbps
- 1 Gbps = 1000 Mbps
- 1 Tbps = 1000 Gbps