Motorola M68000 Family - Revision history

Jnc: +Category

2024-02-20T05:17:58Z

+Category

← Older revision		Revision as of 05:17, 20 February 2024
Line 36:		Line 36:

	[[Category: Motorola Microprocessors]]		[[Category: Motorola Microprocessors]]
			[[Category: Architectures]]
	[[Category: 32-bit Computers]]		[[Category: 32-bit Computers]]

Jnc: typo

2023-10-04T17:21:00Z

typo

← Older revision		Revision as of 17:21, 4 October 2023
Line 9:		Line 9:
	all shared by all members of the family (which are generally compatible at the [[object code]] level) it is a 32-bit machine. (A large share of the instructions are only 16 bits long, however.)		all shared by all members of the family (which are generally compatible at the [[object code]] level) it is a 32-bit machine. (A large share of the instructions are only 16 bits long, however.)

	The earliest member of the family (the [[MC68000]] did not support [[virtual memory]] or [[virtualization]], but all the later members did. The 68K family is a [[Complex Instruction Set Computer\|CISC]] architecture.		The earliest member of the family (the [[MC68000]]) did not support [[virtual memory]] or [[virtualization]], but all the later members did. The 68K family is a [[Complex Instruction Set Computer\|CISC]] architecture.

	The architecture shows clear influences from the [[PDP-11 architecture]], including auto-increment and -decrement modes for stack support and array operations, memory-mapped I/O, etc. In other ways it has similar approaches to the PDP-11, including large numbers of general-purpose registers, a very orthogonal instruction set, etc, although it is harder to say definitively what the source was.		The architecture shows clear influences from the [[PDP-11 architecture]], including auto-increment and -decrement modes for stack support and array operations, memory-mapped I/O, etc. In other ways it has similar approaches to the PDP-11, including large numbers of general-purpose registers, a very orthogonal instruction set, etc, although it is harder to say definitively what the source was.
Line 36:		Line 36:

	[[Category: Motorola Microprocessors]]		[[Category: Motorola Microprocessors]]
	[[Category: 32-~~bit_Computers~~]]		[[Category: 32-bit Computers]]

Jnc: /* External links */ +M68000 Family Reference

2023-07-13T17:11:15Z

External links: +M68000 Family Reference

← Older revision		Revision as of 17:11, 13 July 2023
Line 33:		Line 33:

	* [http://www.bitsavers.org/components/motorola/68000/ 68000] - documentation at [[Bitsavers]]		* [http://www.bitsavers.org/components/motorola/68000/ 68000] - documentation at [[Bitsavers]]
			** [http://www.bitsavers.org/components/motorola/68000/M68000_Family_Reference_1988.pdf M68000 Family Reference] (FR68K/D)

	[[Category: Motorola Microprocessors]]		[[Category: Motorola Microprocessors]]
	[[Category: 32-bit_Computers]]		[[Category: 32-bit_Computers]]

Jnc: /* External links */ +docs

2023-07-12T15:15:57Z

External links: +docs

← Older revision		Revision as of 15:15, 12 July 2023
Line 29:		Line 29:
	* Fourth generation - superscalar		* Fourth generation - superscalar
	** [[MC68060]]		** [[MC68060]]

			==External links==

			* [http://www.bitsavers.org/components/motorola/68000/ 68000] - documentation at [[Bitsavers]]

	[[Category: Motorola Microprocessors]]		[[Category: Motorola Microprocessors]]
	[[Category: 32-bit_Computers]]		[[Category: 32-bit_Computers]]

Jnc: New cat

2023-07-11T16:11:00Z

New cat

← Older revision		Revision as of 16:11, 11 July 2023
Line 31:		Line 31:

	[[Category: Motorola Microprocessors]]		[[Category: Motorola Microprocessors]]
			[[Category: 32-bit_Computers]]

Larsbrinkhoff: My Lisp sense is tingling.

2023-02-11T14:40:10Z

My Lisp sense is tingling.

← Older revision		Revision as of 14:40, 11 February 2023
Line 13:		Line 13:
	The architecture shows clear influences from the [[PDP-11 architecture]], including auto-increment and -decrement modes for stack support and array operations, memory-mapped I/O, etc. In other ways it has similar approaches to the PDP-11, including large numbers of general-purpose registers, a very orthogonal instruction set, etc, although it is harder to say definitively what the source was.		The architecture shows clear influences from the [[PDP-11 architecture]], including auto-increment and -decrement modes for stack support and array operations, memory-mapped I/O, etc. In other ways it has similar approaches to the PDP-11, including large numbers of general-purpose registers, a very orthogonal instruction set, etc, although it is harder to say definitively what the source was.

	During their lifetime (in the 1980s and early 1990s), they were popular, initially in small [[time-sharing]] systems, and then [[workstation]]s (e.g. the [[Sun workstation]]) and finally in [[personal computer]]s (notably the [[Apple Macintosh]].		During their lifetime (in the 1980s and early 1990s), they were popular, initially in small [[time-sharing]] systems, and then [[workstation]]s (e.g. the [[Sun workstation]]) and finally in [[personal computer]]s (notably the [[Apple Macintosh]]).

	In the latter role, their primary competition was the [[Intel x86]] microprocessor line. They are no longer used in personal computers, but derivatives are still in wide use in embedded systems.		In the latter role, their primary competition was the [[Intel x86]] microprocessor line. They are no longer used in personal computers, but derivatives are still in wide use in embedded systems.

Jnc: proper cat

2018-12-16T15:30:58Z

proper cat

← Older revision		Revision as of 15:30, 16 December 2018
Line 30:		Line 30:
	** [[MC68060]]		** [[MC68060]]

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

Jnc: +cat

2018-12-16T15:23:01Z

+cat

← Older revision		Revision as of 15:23, 16 December 2018
Line 29:		Line 29:
	* Fourth generation - superscalar		* Fourth generation - superscalar
	** [[MC68060]]		** [[MC68060]]

			[[Category: Microprocessors]]

Jnc: Avoid redirs

2017-11-11T17:35:27Z

Avoid redirs

Jnc: typos

2016-11-15T15:41:58Z

typos

← Older revision		Revision as of 15:41, 15 November 2016
Line 11:		Line 11:
	The earliest member of the family (the [[MC68000]] did not support [[virtual memory]] or [[virtualization]], but all the later members did. The 68K family is a [[CISC]] architecture.		The earliest member of the family (the [[MC68000]] did not support [[virtual memory]] or [[virtualization]], but all the later members did. The 68K family is a [[CISC]] architecture.

	The architecture shows clear influences from the [[PDP-11 architecture]], including auto-increment and -decrement modes for stack ~~suppport~~ and array operations, memory-mapped I/O, etc. In other ways it has similar ~~aproaches~~ to the PDP-11, including large numbers of general-purpose registers, a very orthogonal instruction set, etc, although it is harder to say definitively what the source was.		The architecture shows clear influences from the [[PDP-11 architecture]], including auto-increment and -decrement modes for stack support and array operations, memory-mapped I/O, etc. In other ways it has similar approaches to the PDP-11, including large numbers of general-purpose registers, a very orthogonal instruction set, etc, although it is harder to say definitively what the source was.

	During their lifetime (in the 1980s and early 1990s), they were popular, initially in small [[time-sharing]] systems, and then [[workstation]]s (e.g. the [[Sun workstation]]) and finally in [[personal computer]]s (notably the [[Apple Macintosh]].		During their lifetime (in the 1980s and early 1990s), they were popular, initially in small [[time-sharing]] systems, and then [[workstation]]s (e.g. the [[Sun workstation]]) and finally in [[personal computer]]s (notably the [[Apple Macintosh]].

← Older revision		Revision as of 17:35, 11 November 2017
Line 1:		Line 1:
	The '''Motorola 68000 family''' (also 680x0, 68K, etc) is a series of [[VLSI]] [[microprocessor]]s, successor to Motorola's prior [[Motorola M6800]].		The '''Motorola 68000 family''' (also 680x0, 68K, etc) is a series of [[VLSI]] [[microprocessor]]s, successor to Motorola's prior [[Motorola M6800]].

	Although the first in the series (the [[MC68000]]) was described by Motorola as a "16-bit microprocessor", the family is generally considered to be a 32-bit. In a number of important aspects of an architecture:		Although the first in the series (the [[MC68000]]) was described by Motorola as a "16-bit microprocessor", the family is generally considered to be a 32-bit. In a number of important aspects of an [[architecture]]:

	* Word (address space) size		* Word ([[address space]]) size
	* Register length		* Register length
	* Many operations (arithmetical, logical, etc)		* Many operations (arithmetical, logical, etc)
Line 9:		Line 9:
	all shared by all members of the family (which are generally compatible at the [[object code]] level) it is a 32-bit machine. (A large share of the instructions are only 16 bits long, however.)		all shared by all members of the family (which are generally compatible at the [[object code]] level) it is a 32-bit machine. (A large share of the instructions are only 16 bits long, however.)

	The earliest member of the family (the [[MC68000]] did not support [[virtual memory]] or [[virtualization]], but all the later members did. The 68K family is a [[CISC]] architecture.		The earliest member of the family (the [[MC68000]] did not support [[virtual memory]] or [[virtualization]], but all the later members did. The 68K family is a [[Complex Instruction Set Computer\|CISC]] architecture.

	The architecture shows clear influences from the [[PDP-11 architecture]], including auto-increment and -decrement modes for stack support and array operations, memory-mapped I/O, etc. In other ways it has similar approaches to the PDP-11, including large numbers of general-purpose registers, a very orthogonal instruction set, etc, although it is harder to say definitively what the source was.		The architecture shows clear influences from the [[PDP-11 architecture]], including auto-increment and -decrement modes for stack support and array operations, memory-mapped I/O, etc. In other ways it has similar approaches to the PDP-11, including large numbers of general-purpose registers, a very orthogonal instruction set, etc, although it is harder to say definitively what the source was.
Line 17:		Line 17:
	In the latter role, their primary competition was the [[Intel x86]] microprocessor line. They are no longer used in personal computers, but derivatives are still in wide use in embedded systems.		In the latter role, their primary competition was the [[Intel x86]] microprocessor line. They are no longer used in personal computers, but derivatives are still in wide use in embedded systems.

	Motorola ceased development of the 68000 family in 1994, when they moved to the [[Motorola 88000 family]] of [[RISC]] processsors, and soon thereafter the [[PowerPC]] family, in collaboration with [[IBM]] and [[Apple Computer]].		Motorola ceased development of the 68000 family in 1994, when they moved to the [[Motorola 88000 family]] of [[Reduced Instruction Set Computer\|RISC]] processsors, and soon thereafter the [[PowerPC]] family, in collaboration with [[International Business Machines\|IBM]] and [[Apple Computer]].

	* First generation - internally 16/32-bit		* First generation - internally 16/32-bit