Motorola MC68000 - Revision history

Jnc: Move image into infobox

2024-02-08T15:37:14Z

Move image into infobox

← Older revision		Revision as of 15:37, 8 February 2024
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	{{Infobox CPU		{{Infobox CPU
	\| name = MC68000		\| name = MC68000
			\| image = mc68000.jpg
			\| imgwidth = 200px
			\| caption = MC68000 in a Macintosh SE
	\| manufacturer = [[Motorola]]		\| manufacturer = [[Motorola]]
	\| family = [[Motorola M68000 Family]]		\| family = [[Motorola M68000 Family]]
Line 10:		Line 13:
	\| clock speed = 4 MHz - 16.67 MHz		\| clock speed = 4 MHz - 16.67 MHz
	}}		}}

	~~[[Image:mc68000.jpg\|thumb\|200px\|right\|MC68000 from a Macintosh SE]]~~

	The '''Motorola MC68000''' was the first member of the [[Motorola M68000 Family]] of [[VLSI]] [[microprocessor]]s. Although it was described by Motorola as a "16-bit microprocessor", it is generally considered to be a 32-bit [[architecture]]; it is probably more correct to describe it as a 16-bit '''''implementation''''' of a 32-bit architecture.		The '''Motorola MC68000''' was the first member of the [[Motorola M68000 Family]] of [[VLSI]] [[microprocessor]]s. Although it was described by Motorola as a "16-bit microprocessor", it is generally considered to be a 32-bit [[architecture]]; it is probably more correct to describe it as a 16-bit '''''implementation''''' of a 32-bit architecture.

Jnc: /* External links */ +data sheet

2023-07-12T15:22:19Z

External links: +data sheet

← Older revision		Revision as of 15:22, 12 July 2023
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	{{semi-stub}}		{{semi-stub}}

			==External links==

			* [http://www.bitsavers.org/components/motorola/68000/ 68000] - documentation at [[Bitsavers]]
			** [http://www.bitsavers.org/components/motorola/68000/MC68000_16-Bit_Microprocessor_Apr83.pdf MC68000 16-Bit Microprocessor] - data sheet

	[[Category: Motorola Microprocessors]]		[[Category: Motorola Microprocessors]]

Larsbrinkhoff: Typo.

2023-02-11T14:38:15Z

Typo.

← Older revision		Revision as of 14:38, 11 February 2023
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	[[Image:mc68000.jpg\|thumb\|200px\|right\|MC68000 from a Macintosh SE]]		[[Image:mc68000.jpg\|thumb\|200px\|right\|MC68000 from a Macintosh SE]]

	The '''Motorola MC68000''' was the first member of the [[Motorola M68000 Family]] of [[VLSI]] [[microprocessor]]s. Although it was described by ~~Motorala~~ as a "16-bit microprocessor", it is generally considered to be a 32-bit [[architecture]]; it is probably more correct to describe it as a 16-bit '''''implementation''''' of a 32-bit architecture.		The '''Motorola MC68000''' was the first member of the [[Motorola M68000 Family]] of [[VLSI]] [[microprocessor]]s. Although it was described by Motorola as a "16-bit microprocessor", it is generally considered to be a 32-bit [[architecture]]; it is probably more correct to describe it as a 16-bit '''''implementation''''' of a 32-bit architecture.

	A major failing of the MC68000 was that it could not support [[virtual memory]]; not enough internal state was saved when a [[page fault]] occurred. Several computer makers worked around this by including two separate MC68000 chips; when a fault occurred, the first CPU was 'frozen', and a second fixed up the fault, then re-started the 'main' CPU. This issue was fixed with the successor chip, the [[MC68010]].		A major failing of the MC68000 was that it could not support [[virtual memory]]; not enough internal state was saved when a [[page fault]] occurred. Several computer makers worked around this by including two separate MC68000 chips; when a fault occurred, the first CPU was 'frozen', and a second fixed up the fault, then re-started the 'main' CPU. This issue was fixed with the successor chip, the [[MC68010]].

Jnc: +Cat

2018-11-03T11:53:23Z

+Cat

← Older revision		Revision as of 11:53, 3 November 2018
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	A major failing of the MC68000 was that it could not support [[virtual memory]]; not enough internal state was saved when a [[page fault]] occurred. Several computer makers worked around this by including two separate MC68000 chips; when a fault occurred, the first CPU was 'frozen', and a second fixed up the fault, then re-started the 'main' CPU. This issue was fixed with the successor chip, the [[MC68010]].		A major failing of the MC68000 was that it could not support [[virtual memory]]; not enough internal state was saved when a [[page fault]] occurred. Several computer makers worked around this by including two separate MC68000 chips; when a fault occurred, the first CPU was 'frozen', and a second fixed up the fault, then re-started the 'main' CPU. This issue was fixed with the successor chip, the [[MC68010]].

			{{semi-stub}}

			[[Category: Motorola Microprocessors]]

Jnc: Fix addr bus width error

2018-01-24T13:07:27Z

Fix addr bus width error

← Older revision		Revision as of 13:07, 24 January 2018
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	\| family = [[Motorola M68000 Family]]		\| family = [[Motorola M68000 Family]]
	\| architecture = 32-bit		\| architecture = 32-bit
	\| address bus = 24-bit		\| address bus = 23-bit (16-bit word address)
	\| data bus = 16-bit		\| data bus = 16-bit
	\| year introduced = 1979		\| year introduced = 1979
Line 13:		Line 13:
	[[Image:mc68000.jpg\|thumb\|200px\|right\|MC68000 from a Macintosh SE]]		[[Image:mc68000.jpg\|thumb\|200px\|right\|MC68000 from a Macintosh SE]]

	The '''Motorola MC68000''' was the first member of the [[Motorola M68000 Family]] of [[VLSI]] [[microprocessor]]s. Although it was described by Motorala as a "16-bit microprocessor", it is generally considered to be a 32-bit ~~'''''~~architecture~~'''''~~; it is probably more correct to describe it as a 16-bit '''''implementation''''' of a 32-bit architecture.		The '''Motorola MC68000''' was the first member of the [[Motorola M68000 Family]] of [[VLSI]] [[microprocessor]]s. Although it was described by Motorala as a "16-bit microprocessor", it is generally considered to be a 32-bit [[architecture]]; it is probably more correct to describe it as a 16-bit '''''implementation''''' of a 32-bit architecture.

	A major failing of the MC68000 was that it could not support [[virtual memory]]; not enough internal state was saved when a fault occurred. Several computer makers worked around this by including two separate MC68000 chips; when a ~~page~~ fault occurred, the first ~~one~~ was 'frozen', and a second fixed up the fault, then ~~restarted~~ the 'main' CPU. This issue was fixed with the successor chip, the [[MC68010]].		A major failing of the MC68000 was that it could not support [[virtual memory]]; not enough internal state was saved when a [[page fault]] occurred. Several computer makers worked around this by including two separate MC68000 chips; when a fault occurred, the first CPU was 'frozen', and a second fixed up the fault, then re-started the 'main' CPU. This issue was fixed with the successor chip, the [[MC68010]].

Tor: Typo fixed.

2016-12-05T12:42:39Z

Typo fixed.

← Older revision		Revision as of 12:42, 5 December 2016
Line 15:		Line 15:
	The '''Motorola MC68000''' was the first member of the [[Motorola M68000 Family]] of [[VLSI]] [[microprocessor]]s. Although it was described by Motorala as a "16-bit microprocessor", it is generally considered to be a 32-bit '''''architecture'''''; it is probably more correct to describe it as a 16-bit '''''implementation''''' of a 32-bit architecture.		The '''Motorola MC68000''' was the first member of the [[Motorola M68000 Family]] of [[VLSI]] [[microprocessor]]s. Although it was described by Motorala as a "16-bit microprocessor", it is generally considered to be a 32-bit '''''architecture'''''; it is probably more correct to describe it as a 16-bit '''''implementation''''' of a 32-bit architecture.

	A major failing of the MC68000 was that it could not support [[virtual memory]]; not enough internal state was ~~occurred~~ when a fault occurred. Several computer makers worked around this by including two separate MC68000 chips; when a page fault occurred, the first one was 'frozen', and a second fixed up the fault, then restarted the 'main' CPU. This issue was fixed with the successor chip, the [[MC68010]].		A major failing of the MC68000 was that it could not support [[virtual memory]]; not enough internal state was saved when a fault occurred. Several computer makers worked around this by including two separate MC68000 chips; when a page fault occurred, the first one was 'frozen', and a second fixed up the fault, then restarted the 'main' CPU. This issue was fixed with the successor chip, the [[MC68010]].

Neozeed: Add an image of the 68000 processor

2016-11-23T05:01:21Z

Add an image of the 68000 processor

← Older revision		Revision as of 05:01, 23 November 2016
Line 10:		Line 10:
	\| clock speed = 4 MHz - 16.67 MHz		\| clock speed = 4 MHz - 16.67 MHz
	}}		}}

			[[Image:mc68000.jpg\|thumb\|200px\|right\|MC68000 from a Macintosh SE]]

	The '''Motorola MC68000''' was the first member of the [[Motorola M68000 Family]] of [[VLSI]] [[microprocessor]]s. Although it was described by Motorala as a "16-bit microprocessor", it is generally considered to be a 32-bit '''''architecture'''''; it is probably more correct to describe it as a 16-bit '''''implementation''''' of a 32-bit architecture.		The '''Motorola MC68000''' was the first member of the [[Motorola M68000 Family]] of [[VLSI]] [[microprocessor]]s. Although it was described by Motorala as a "16-bit microprocessor", it is generally considered to be a 32-bit '''''architecture'''''; it is probably more correct to describe it as a 16-bit '''''implementation''''' of a 32-bit architecture.

	A major failing of the MC68000 was that it could not support [[virtual memory]]; not enough internal state was occurred when a fault occurred. Several computer makers worked around this by including two separate MC68000 chips; when a page fault occurred, the first one was 'frozen', and a second fixed up the fault, then restarted the 'main' CPU. This issue was fixed with the successor chip, the [[MC68010]].		A major failing of the MC68000 was that it could not support [[virtual memory]]; not enough internal state was occurred when a fault occurred. Several computer makers worked around this by including two separate MC68000 chips; when a page fault occurred, the first one was 'frozen', and a second fixed up the fault, then restarted the 'main' CPU. This issue was fixed with the successor chip, the [[MC68010]].

Jnc: move length discussion to family article

2016-11-14T18:39:18Z

move length discussion to family article

← Older revision		Revision as of 18:39, 14 November 2016
Line 11:		Line 11:
	}}		}}

	The '''Motorola MC68000''' was the first member of the [[Motorola M68000 Family]] of [[VLSI]] [[microprocessor]]s. Although it was described by Motorala as a "16-bit microprocessor", it is generally considered to be a 32-bit '''''architecture'''''~~, because in a number of important aspects of an architecture:~~		The '''Motorola MC68000''' was the first member of the [[Motorola M68000 Family]] of [[VLSI]] [[microprocessor]]s. Although it was described by Motorala as a "16-bit microprocessor", it is generally considered to be a 32-bit '''''architecture'''''; it is probably more correct to describe it as a 16-bit '''''implementation''''' of a 32-bit architecture.

	* Word (address space) size
	* Register length
	* Many operations (arithmetical, logical, etc)

	It is probably more correct to describe it as a 16-bit '''''implementation''''' of a 32-bit architecture.

	A major failing of the MC68000 was that it could not support [[virtual memory]]; not enough internal state was occurred when a fault occurred. Several computer makers worked around this by including two separate MC68000 chips; when a page fault occurred, the first one was 'frozen', and a second fixed up the fault, then restarted the 'main' CPU. This issue was fixed with the successor chip, the [[MC68010]].		A major failing of the MC68000 was that it could not support [[virtual memory]]; not enough internal state was occurred when a fault occurred. Several computer makers worked around this by including two separate MC68000 chips; when a page fault occurred, the first one was 'frozen', and a second fixed up the fault, then restarted the 'main' CPU. This issue was fixed with the successor chip, the [[MC68010]].

Jnc: a decent start

2016-11-14T17:38:29Z

a decent start

New page

{{Infobox CPU
| name = MC68000
| manufacturer = [[Motorola]]
| family = [[Motorola M68000 Family]]
| architecture = 32-bit
| address bus = 24-bit
| data bus = 16-bit
| year introduced = 1979
| registers = 15 general 32-bit registers (8 data, 7 address)
| clock speed = 4 MHz - 16.67 MHz
}}

The '''Motorola MC68000''' was the first member of the [[Motorola M68000 Family]] of [[VLSI]] [[microprocessor]]s. Although it was described by Motorala as a "16-bit microprocessor", it is generally considered to be a 32-bit '''''architecture''''', because in a number of important aspects of an architecture:

* Word (address space) size
* Register length
* Many operations (arithmetical, logical, etc)

It is probably more correct to describe it as a 16-bit '''''implementation''''' of a 32-bit architecture.

A major failing of the MC68000 was that it could not support [[virtual memory]]; not enough internal state was occurred when a fault occurred. Several computer makers worked around this by including two separate MC68000 chips; when a page fault occurred, the first one was 'frozen', and a second fixed up the fault, then restarted the 'main' CPU. This issue was fixed with the successor chip, the [[MC68010]].