Megabit: Difference between revisions

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Revision as of 21:22, 10 April 2007 editBladestorm (talk \| contribs)1,674 edits Revert: You CAN NOT convert decimal values to ''approximate'' binary equivalents. This is EXPLICITLY stated! Also, MEGABIT should link to MEGABYTE. Look up WP:POINT.← Previous edit		Revision as of 21:41, 10 April 2007 edit undoIntgr (talk \| contribs)Autopatrolled, Extended confirmed users, New page reviewers, Pending changes reviewers32,254 edits SLi's edit was correct -- 125000 bytes is 125 kilobytes, and RAM/EEPROM/flash memory devices are measured in mebibits, not megabitsNext edit →
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	The '''megabit''' is a unit of ] storage, abbreviated '''Mbit''' or sometimes '''Mb'''.		The '''megabit''' is a unit of ] storage, abbreviated '''Mbit''' or sometimes '''Mb'''.

	1 megabit = 10<sup>6</sup> = 1,000,000 ]s which is equal to 125,000 ]s or ~~122~~ ]s.		1 megabit = 10<sup>6</sup> = 1,000,000 ]s which is equal to 125,000 ]s or 125 ]s.

	The megabit is most commonly used when referring to data transfer rates in network speeds, e.g. a 100 Mbit/s Fast ] connection. In this context, like elsewhere in ], it always equals 10<sup>6</sup> bits. Residential high speed internet is often measured in megabits.		The megabit is most commonly used when referring to data transfer rates in network speeds, e.g. a 100 Mbit/s Fast ] connection. In this context, like elsewhere in ], it always equals 10<sup>6</sup> bits. Residential high speed internet is often measured in megabits.
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	In the 16-bit games console era, the 'megabit' (Mbit) became a commonly-used measure of the size (] capacity) of games cartridges. The vast majority of ] / ] (Genesis) games were produced on standard 8-Mbit cartridges, although 4-Mbit cartridges were not uncommon and, later in the life of these consoles, graphically-intensive titles would appear on 12, 16, even 32-Mbit cartridges. ] and ] were 48 Mbits.		In the 16-bit games console era, the 'megabit' (Mbit) became a commonly-used measure of the size (] capacity) of games cartridges. The vast majority of ] / ] (Genesis) games were produced on standard 8-Mbit cartridges, although 4-Mbit cartridges were not uncommon and, later in the life of these consoles, graphically-intensive titles would appear on 12, 16, even 32-Mbit cartridges. ] and ] were 48 Mbits.

	The rule is: 8 bits = 1 byte. Therefore a 4-Mbit cartridge had a capacity of 512 ], an 8 Mbit cartridge held 1 ] of data, and so on.		The rule is: 8 bits = 1 byte. Therefore a 4-Mbit cartridge had a capacity of 512 ], an 8 Mbit cartridge held 1 ] of data, and so on.

	It is likely that ] and ] adopted the 'megabit' terminology for cartridge capacity rather than the more common ] for commercial reasons (i.e. putting a bigger number on the package).{{Fact\|date=February 2007}}		It is likely that ] and ] adopted the 'megabit' terminology for cartridge capacity rather than the more common ] for commercial reasons (i.e. putting a bigger number on the package).{{Fact\|date=February 2007}}

Revision as of 21:41, 10 April 2007

Multiple-bit units

Decimal
Value	Metric
1000	kbit	kilobit
1000	Mbit	megabit
1000	Gbit	gigabit
1000	Tbit	terabit
1000	Pbit	petabit
1000	Ebit	exabit
1000	Zbit	zettabit
1000	Ybit	yottabit
1000	Rbit	ronnabit
1000	Qbit	quettabit

Binary
Value	IEC		Memory
1024	Kibit	kibibit	Kbit	Kb	kilobit
1024	Mibit	mebibit	Mbit	Mb	megabit
1024	Gibit	gibibit	Gbit	Gb	gigabit
1024	Tibit	tebibit	—
1024	Pibit	pebibit	—
1024	Eibit	exbibit	—
1024	Zibit	zebibit	—
1024	Yibit	yobibit	—
—
—

Orders of magnitude of data

The megabit is a unit of information storage, abbreviated Mbit or sometimes Mb.

1 megabit = 10 = 1,000,000 bits which is equal to 125,000 bytes or 125 kilobytes.

The megabit is most commonly used when referring to data transfer rates in network speeds, e.g. a 100 Mbit/s Fast Ethernet connection. In this context, like elsewhere in telecommunications, it always equals 10 bits. Residential high speed internet is often measured in megabits.

A binary counterpart of megabit, useful for measuring RAM and ROM chip capacity, is mebibit.

Video game cartridges

In the 16-bit games console era, the 'megabit' (Mbit) became a commonly-used measure of the size (data storage capacity) of games cartridges. The vast majority of SNES / Megadrive (Genesis) games were produced on standard 8-Mbit cartridges, although 4-Mbit cartridges were not uncommon and, later in the life of these consoles, graphically-intensive titles would appear on 12, 16, even 32-Mbit cartridges. Tales of Phantasia and Star Ocean were 48 Mbits.

The rule is: 8 bits = 1 byte. Therefore a 4-Mbit cartridge had a capacity of 512 KiB, an 8 Mbit cartridge held 1 MiB of data, and so on.

It is likely that Nintendo and Sega adopted the 'megabit' terminology for cartridge capacity rather than the more common megabyte for commercial reasons (i.e. putting a bigger number on the package).

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