MOS operating system - Revision history

Jnc: /* External links */ +Extended Memory MOS

2024-01-25T14:36:56Z

External links: +Extended Memory MOS

← Older revision		Revision as of 14:36, 25 January 2024
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	* [https://www.rfc-editor.org/ien/ien136.txt Memory Management Extensions to the SRI Micro Operating Systemfor PDP-11/23/34/35/40] (IEN-136)		* [https://www.rfc-editor.org/ien/ien136.txt Memory Management Extensions to the SRI Micro Operating Systemfor PDP-11/23/34/35/40] (IEN-136)
	* [https://www.rfc-editor.org/ien/ien164.txt CMOS System Overview] (IEN-164)		* [https://www.rfc-editor.org/ien/ien164.txt CMOS System Overview] (IEN-164)
			* [https://www.rfc-editor.org/ien/ien198.txt Extended Memory MOS for a UNIX Development Host] (IEN-198)

	[[Category: Non-DEC Operating Systems]]		[[Category: Non-DEC Operating Systems]]
	[[Category: PDP-11 Operating Systems]]		[[Category: PDP-11 Operating Systems]]
	[[Category: Real-Time Operating Systems]]		[[Category: Real-Time Operating Systems]]

Jnc: /* External links */ +another IEN about MOS

2022-10-22T05:04:32Z

External links: +another IEN about MOS

← Older revision		Revision as of 05:04, 22 October 2022
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	* [http://ana-3.lcs.mit.edu/~jnc/tech/mos/src/ MOS operating system] - source code		* [http://ana-3.lcs.mit.edu/~jnc/tech/mos/src/ MOS operating system] - source code
	* [http://ana-3.lcs.mit.edu/~jnc/tech/mos/docs/tiunv2.lpt Terminal Interface Unit Notebook: Volume 2 - Software Documentation] - information on building system loads, as well as MOS documentation		* [http://ana-3.lcs.mit.edu/~jnc/tech/mos/docs/tiunv2.lpt Terminal Interface Unit Notebook: Volume 2 - Software Documentation] - information on building system loads, as well as MOS documentation
	* [https://www.rfc-editor.org/ien/ien164.txt CMOS System Overview]		* [https://www.rfc-editor.org/ien/ien136.txt Memory Management Extensions to the SRI Micro Operating Systemfor PDP-11/23/34/35/40] (IEN-136)
			* [https://www.rfc-editor.org/ien/ien164.txt CMOS System Overview] (IEN-164)

	[[Category: Non-DEC Operating Systems]]		[[Category: Non-DEC Operating Systems]]
	[[Category: PDP-11 Operating Systems]]		[[Category: PDP-11 Operating Systems]]
	[[Category: Real-Time Operating Systems]]		[[Category: Real-Time Operating Systems]]

Jnc: /* See also */ +C Gateway

2022-03-23T23:01:52Z

Jnc: /* External links */ +source

2022-01-19T14:25:44Z

External links: +source

← Older revision		Revision as of 14:25, 19 January 2022
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	==External links==		==External links==

			* [http://ana-3.lcs.mit.edu/~jnc/tech/mos/hdr/ MOS operating system] - header files
			* [http://ana-3.lcs.mit.edu/~jnc/tech/mos/src/ MOS operating system] - source code
	* [http://ana-3.lcs.mit.edu/~jnc/tech/mos/docs/tiunv2.lpt Terminal Interface Unit Notebook: Volume 2 - Software Documentation] - information on building system loads, as well as MOS documentation		* [http://ana-3.lcs.mit.edu/~jnc/tech/mos/docs/tiunv2.lpt Terminal Interface Unit Notebook: Volume 2 - Software Documentation] - information on building system loads, as well as MOS documentation
	* [https://www.rfc-editor.org/ien/ien164.txt CMOS System Overview]		* [https://www.rfc-editor.org/ien/ien164.txt CMOS System Overview]

Jnc: typo

2022-01-19T12:33:18Z

typo

← Older revision		Revision as of 12:33, 19 January 2022
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	It supported [[process]]es (but not [[preemption]], or creation/termination of processes - all processes were created at system [[linking]] time), queued inter-process messages ('signals'), asynchronous I/O, and allocation and freeing of [[main memory]]; it had no [[file system]] or other support for [[secondary storage]].		It supported [[process]]es (but not [[preemption]], or creation/termination of processes - all processes were created at system [[linking]] time), queued inter-process messages ('signals'), asynchronous I/O, and allocation and freeing of [[main memory]]; it had no [[file system]] or other support for [[secondary storage]].

	It appears to have been inspired by the [[ELF operating system]] (which also has 'Device Control Tables' and 'I/O Request Blocks', which look similar in their details to the MOS ones, and uses signals to notify of asynchronous I/O operation completion), but it is much simpler than ELF; for instance, all MOS code necessarily shares a ~~singe~~ address space, and MOS processes are static, unlike ELF.		It appears to have been inspired by the [[ELF operating system]] (which also has 'Device Control Tables' and 'I/O Request Blocks', which look similar in their details to the MOS ones, and uses signals to notify of asynchronous I/O operation completion), but it is much simpler than ELF; for instance, all MOS code necessarily shares a single address space, and MOS processes are static, unlike ELF.

	The original version was written in [[MACRO-11]], the [[assembly language]] for the PDP-11; it was later re-written at least three times in [[C programming language\|C]]: at [[BBN]], at UCL, and at Proteon. The first and last versions were [[portable]]; the latter also ran on the [[Motorola MC68000\|MC68000]], the [[Intel x86]], and the [[AMD29000]].		The original version was written in [[MACRO-11]], the [[assembly language]] for the PDP-11; it was later re-written at least three times in [[C programming language\|C]]: at [[BBN]], at UCL, and at Proteon. The first and last versions were [[portable]]; the latter also ran on the [[Motorola MC68000\|MC68000]], the [[Intel x86]], and the [[AMD29000]].

Jnc: Also the x86

2021-12-13T14:14:35Z

Also the x86

← Older revision		Revision as of 14:14, 13 December 2021
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	It appears to have been inspired by the [[ELF operating system]] (which also has 'Device Control Tables' and 'I/O Request Blocks', which look similar in their details to the MOS ones, and uses signals to notify of asynchronous I/O operation completion), but it is much simpler than ELF; for instance, all MOS code necessarily shares a singe address space, and MOS processes are static, unlike ELF.		It appears to have been inspired by the [[ELF operating system]] (which also has 'Device Control Tables' and 'I/O Request Blocks', which look similar in their details to the MOS ones, and uses signals to notify of asynchronous I/O operation completion), but it is much simpler than ELF; for instance, all MOS code necessarily shares a singe address space, and MOS processes are static, unlike ELF.

	The original version was written in [[MACRO-11]], the [[assembly language]] for the PDP-11; it was later re-written at least three times in [[C programming language\|C]]: at [[BBN]], at UCL, and at Proteon. The first and last versions were [[portable]]; the latter also ran on the [[Motorola MC68000\|MC68000]] and [[AMD29000]].		The original version was written in [[MACRO-11]], the [[assembly language]] for the PDP-11; it was later re-written at least three times in [[C programming language\|C]]: at [[BBN]], at UCL, and at Proteon. The first and last versions were [[portable]]; the latter also ran on the [[Motorola MC68000\|MC68000]], the [[Intel x86]], and the [[AMD29000]].

	All were somewhat extended from the original; the first two fairly extensively, the latter only to make use of [[up-call]]s in the I/O system, and to support [[pseudo-terminal]]s.		All were somewhat extended from the original; the first two fairly extensively, the latter only to make use of [[up-call]]s in the I/O system, and to support [[pseudo-terminal]]s.

Jnc: /* External links */ +Terminal Interface Unit Notebook: Volume 2 - Software Documentation

2021-11-14T20:50:00Z

External links: +Terminal Interface Unit Notebook: Volume 2 - Software Documentation

← Older revision		Revision as of 20:50, 14 November 2021
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	==External links==		==External links==

			* [http://ana-3.lcs.mit.edu/~jnc/tech/mos/docs/tiunv2.lpt Terminal Interface Unit Notebook: Volume 2 - Software Documentation] - information on building system loads, as well as MOS documentation
	* [https://www.rfc-editor.org/ien/ien164.txt CMOS System Overview]		* [https://www.rfc-editor.org/ien/ien164.txt CMOS System Overview]

Jnc: inspired by ELF?

2021-11-12T07:13:10Z

inspired by ELF?

← Older revision		Revision as of 07:13, 12 November 2021
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	The '''MOS operating system''' (formally the 'Micro Operating System', but informally 'Mathis' Operating System', after the creator, Jim Mathis of [[SRI International\|SRI]]) was a cooperative [[real-time]] [[multi-tasking]] [[operating system]], originally for the [[PDP-11]], used for a number of [[packet switch]]es and similar network applications. It was initially written as part of the [[Terminal Interface Unit]] project, the first [[application]] which used it.		The '''MOS operating system''' (formally the 'Micro Operating System', but informally 'Mathis' Operating System', after the creator, Jim Mathis of [[SRI International\|SRI]]) was a cooperative [[real-time]] [[multi-tasking]] [[operating system]], originally for the [[PDP-11]], used for a number of [[packet switch]]es and similar network applications. It was initially written as part of the [[Terminal Interface Unit]] project, the first [[application]] which used it.

	It supported [[process]]es (but not [[preemption]], or creation/termination of processes - all processes were created at system [[linking]] time), queued inter-process messages, asynchronous I/O, and allocation and freeing of [[main memory]]; it had no [[file system]] or other support for [[secondary storage]].		It supported [[process]]es (but not [[preemption]], or creation/termination of processes - all processes were created at system [[linking]] time), queued inter-process messages ('signals'), asynchronous I/O, and allocation and freeing of [[main memory]]; it had no [[file system]] or other support for [[secondary storage]].

			It appears to have been inspired by the [[ELF operating system]] (which also has 'Device Control Tables' and 'I/O Request Blocks', which look similar in their details to the MOS ones, and uses signals to notify of asynchronous I/O operation completion), but it is much simpler than ELF; for instance, all MOS code necessarily shares a singe address space, and MOS processes are static, unlike ELF.

	The original version was written in [[MACRO-11]], the [[assembly language]] for the PDP-11; it was later re-written at least three times in [[C programming language\|C]]: at [[BBN]], at UCL, and at Proteon. The first and last versions were [[portable]]; the latter also ran on the [[Motorola MC68000\|MC68000]] and [[AMD29000]].		The original version was written in [[MACRO-11]], the [[assembly language]] for the PDP-11; it was later re-written at least three times in [[C programming language\|C]]: at [[BBN]], at UCL, and at Proteon. The first and last versions were [[portable]]; the latter also ran on the [[Motorola MC68000\|MC68000]] and [[AMD29000]].
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	* [[Port Expander‎]]		* [[Port Expander‎]]
	* [[ANTS terminal system]]		* [[ANTS terminal system]]
	* [[ELF operating system]]
	* [[MINITS]]		* [[MINITS]]

Jnc: TIU was first

2021-11-06T12:26:45Z

TIU was first

← Older revision		Revision as of 12:26, 6 November 2021
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	The '''MOS operating system''' (formally the 'Micro Operating System', but informally 'Mathis' Operating System', after the creator, Jim Mathis of [[SRI International\|SRI]]) was a cooperative [[multi-tasking]] [[operating system]], originally for the [[PDP-11]], used for a number of [[packet switch]]es and similar network applications. It was ~~almost certainly~~ written as part of the [[Terminal Interface Unit]] ~~or [[Port Expander]] projects (likely the former)~~, the first ~~two~~ [[application]]s which used it.		The '''MOS operating system''' (formally the 'Micro Operating System', but informally 'Mathis' Operating System', after the creator, Jim Mathis of [[SRI International\|SRI]]) was a cooperative [[real-time]] [[multi-tasking]] [[operating system]], originally for the [[PDP-11]], used for a number of [[packet switch]]es and similar network applications. It was initially written as part of the [[Terminal Interface Unit]] project, the first [[application]] which used it.

	It supported [[process]]es (but not [[preemption]], or creation/termination of processes - all processes were created at system [[linking]] time), queued inter-process messages, asynchronous I/O, and allocation and freeing of [[main memory]]; it had no [[file system]] or other support for [[secondary storage]].		It supported [[process]]es (but not [[preemption]], or creation/termination of processes - all processes were created at system [[linking]] time), queued inter-process messages, asynchronous I/O, and allocation and freeing of [[main memory]]; it had no [[file system]] or other support for [[secondary storage]].
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	==See also==		==See also==

	* [[Terminal Interface Unit]]
	* [[Port Expander‎]]		* [[Port Expander‎]]
	* [[ANTS terminal system]]		* [[ANTS terminal system]]

Jnc: /* See also */ +initial apps

2021-11-06T12:23:05Z

← Older revision		Revision as of 23:01, 23 March 2022
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	* [[Port Expander‎]]		* [[Port Expander‎]]
			* [[C Gateway]]
	* [[ANTS terminal system]]		* [[ANTS terminal system]]
	* [[MINITS]]		* [[MINITS]]

← Older revision		Revision as of 12:23, 6 November 2021
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	==See also==		==See also==

			* [[Terminal Interface Unit]]
			* [[Port Expander‎]]
	* [[ANTS terminal system]]		* [[ANTS terminal system]]
	* [[ELF operating system]]		* [[ELF operating system]]