ELF operating system - Revision history

Jnc: /* External links */ +Structure of the ELF Operating System

2022-10-14T14:23:17Z

‎External links: +Structure of the ELF Operating System

Jnc: More NCP fixups

2022-06-30T01:15:42Z

More NCP fixups

Jnc: dab NCP

2022-06-05T08:37:26Z

dab NCP

Jnc: mass storage controllers

2021-11-12T07:26:55Z

mass storage controllers

Jnc: /* External links */ +ELF Kernel Programmer's Guide

2021-11-12T06:53:18Z

‎External links: +ELF Kernel Programmer's Guide

Larsbrinkhoff: Meow.

2021-11-08T10:12:49Z

Meow.

Larsbrinkhoff: /* See also */ ANTS.

2021-10-29T16:33:05Z

‎See also: ANTS.

Larsbrinkhoff: ELF source code.

2021-10-29T16:32:07Z

ELF source code.

Larsbrinkhoff: Something about ELF versions.

2021-10-28T10:35:41Z

Something about ELF versions.

Larsbrinkhoff: /* External links */ Operating system design considerations for the packet-switching environment.

2021-10-28T06:05:53Z

‎External links: Operating system design considerations for the packet-switching environment.

@@ Line 29: / Line 29: @@
 * [https://dl.acm.org/doi/10.1145/1499949.1499980 D. L. Retz, ''Operating system design considerations for the packet-switching environment'']
 * [https://github.com/larsbrinkhoff/elf-operating-system ELF source code]
 ** [https://github.com/larsbrinkhoff/elf-operating-system/blob/master/files/kernel.doc%5Bm%2Ctvr%5D200 ELF Kernel Programmer's Guide] - January 1,  1976 version

@@ Line 1: / Line 1: @@
 '''ELF''' was a [[real-time]] [[multi-tasking|multi-programming]] [[operating system]] for the [[PDP-11]] (hence the name - 'elf' is German for 'eleven); generally, those with [[PDP-11 Memory Management]] (both kinds). It allowed [[process]]es to  be  created and terminated, and allowed them access to inter-process communication and timers; allocation and freeing of [[main memory]] was also provided. It was written in [[assembly language]]; applications could also be written in [[BCPL]] and [[BLISS-11]].
-It was originally intended to allow [[user]]s at [[terminal]]s to simultaneously utilize [[time-sharing]] systems on the [[ARPANET]], using [[Network Control Program (ARPANET)|NCP]] (use of which was a standard capability under ELF). It was a successor to [[ANTS]] in this role. It also allowed users to save [[file]]s on local [[mass storage]]; supported mass storage [[device controller]]s were [[TC11 DECtape controller|TC11 DECtape]], [[RF11 disk controller|RF11]] [[fixed-head disk]], [[RK11 disk controller|RK11]] and [[RP11 disk controller|RP11]].
+It was originally intended to allow [[user]]s at [[terminal]]s to simultaneously utilize [[time-sharing]] systems on the [[ARPANET]], using [[Network Control Protocol|NCP]] (use of which was a standard capability under ELF). It was a successor to [[ANTS]] in this role. It also allowed users to save [[file]]s on local [[mass storage]]; supported mass storage [[device controller]]s were [[TC11 DECtape controller|TC11 DECtape]], [[RF11 disk controller|RF11]] [[fixed-head disk]], [[RK11 disk controller|RK11]] and [[RP11 disk controller|RP11]].
-Work on it started in early 1973;  it went into experimental service in early 1974, and by 1976 about 30 sites on the ARPANET were using it. It was later used by researchers at [[Bolt, Beranek, and Newman|BBN]] to support the first [[router]]s on the experimental [[Internet]].
+Work on it started in early 1973; it went into experimental service in early 1974, and by 1976 about 30 sites on the ARPANET were using it. It was later used by researchers at [[Bolt, Beranek, and Newman|BBN]] to support the first [[router]]s on the experimental [[Internet]].
 ELF went through major changes during development. ELF-I had an emphasis on high throughput at the expense of modularity. ELF-II improved modularity but reduced throughput. VM ELF moved applications out of kernel space to separate user spaces.

@@ Line 1: / Line 1: @@
 '''ELF''' was a [[real-time]] [[multi-tasking|multi-programming]] [[operating system]] for the [[PDP-11]] (hence the name - 'elf' is German for 'eleven); generally, those with [[PDP-11 Memory Management]] (both kinds). It allowed [[process]]es to  be  created and terminated, and allowed them access to inter-process communication and timers; allocation and freeing of [[main memory]] was also provided. It was written in [[assembly language]]; applications could also be written in [[BCPL]] and [[BLISS-11]].
-It was originally intended to allow [[user]]s at [[terminal]]s to simultaneously utilize [[time-sharing]] systems on the [[ARPANET]], using [[Network Control Program|NCP]] (use of which was a standard capability under ELF). It was a successor to [[ANTS]] in this role. It also allowed users to save [[file]]s on local [[mass storage]]; supported mass storage [[device controller]]s were [[TC11 DECtape controller|TC11 DECtape]], [[RF11 disk controller|RF11]] [[fixed-head disk]], [[RK11 disk controller|RK11]] and [[RP11 disk controller|RP11]].
+It was originally intended to allow [[user]]s at [[terminal]]s to simultaneously utilize [[time-sharing]] systems on the [[ARPANET]], using [[Network Control Program (ARPANET)|NCP]] (use of which was a standard capability under ELF). It was a successor to [[ANTS]] in this role. It also allowed users to save [[file]]s on local [[mass storage]]; supported mass storage [[device controller]]s were [[TC11 DECtape controller|TC11 DECtape]], [[RF11 disk controller|RF11]] [[fixed-head disk]], [[RK11 disk controller|RK11]] and [[RP11 disk controller|RP11]].
 Work on it started in early 1973;  it went into experimental service in early 1974, and by 1976 about 30 sites on the ARPANET were using it. It was later used by researchers at [[Bolt, Beranek, and Newman|BBN]] to support the first [[router]]s on the experimental [[Internet]].

@@ Line 1: / Line 1: @@
 '''ELF''' was a [[real-time]] [[multi-tasking|multi-programming]] [[operating system]] for the [[PDP-11]] (hence the name - 'elf' is German for 'eleven); generally, those with [[PDP-11 Memory Management]] (both kinds). It allowed [[process]]es to  be  created and terminated, and allowed them access to inter-process communication and timers; allocation and freeing of [[main memory]] was also provided. It was written in [[assembly language]]; applications could also be written in [[BCPL]] and [[BLISS-11]].
-It was originally intended to allow [[user]]s at [[terminal]]s to simultaneously utilize [[time-sharing]] systems on the [[ARPANET]], using [[Network Control Program|NCP]] (use of which was a standard capability under ELF). It was a successor to [[ANTS]] in this role. It also allowed users to save [[file]]s on local [[mass storage]].
+It was originally intended to allow [[user]]s at [[terminal]]s to simultaneously utilize [[time-sharing]] systems on the [[ARPANET]], using [[Network Control Program|NCP]] (use of which was a standard capability under ELF). It was a successor to [[ANTS]] in this role. It also allowed users to save [[file]]s on local [[mass storage]]; supported mass storage [[device controller]]s were [[TC11 DECtape controller|TC11 DECtape]], [[RF11 disk controller|RF11]] [[fixed-head disk]], [[RK11 disk controller|RK11]] and [[RP11 disk controller|RP11]].
 Work on it started in early 1973;  it went into experimental service in early 1974, and by 1976 about 30 sites on the ARPANET were using it. It was later used by researchers at [[Bolt, Beranek, and Newman|BBN]] to support the first [[router]]s on the experimental [[Internet]].

@@ Line 29: / Line 29: @@
 * [https://dl.acm.org/doi/10.1145/1499949.1499980 D. L. Retz, ''Operating system design considerations for the packet-switching environment'']
 * [https://github.com/larsbrinkhoff/elf-operating-system ELF source code]
 [[Category: PDP-11 Operating Systems]]
 [[Category: Non-DEC Operating Systems]]
 [[Category: ARPANET]]

← Older revision		Revision as of 10:12, 8 November 2021
Line 32:		Line 32:
	[[Category: PDP-11 Operating Systems]]		[[Category: PDP-11 Operating Systems]]
	[[Category: Non-DEC Operating Systems]]		[[Category: Non-DEC Operating Systems]]
		+	[[Category: ARPANET]]

@@ Line 13: / Line 13: @@
 ==See also==
 * [[Fuzzball]]
 * [[MINITS]]

← Older revision		Revision as of 10:35, 28 October 2021
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	Work on it started in early 1973; it went into experimental service in early 1974, and by 1976 about 30 sites on the ARPANET were using it. It was later used by researchers at [[Bolt, Beranek, and Newman\|BBN]] to support the first [[router]]s on the experimental [[Internet]].		Work on it started in early 1973; it went into experimental service in early 1974, and by 1976 about 30 sites on the ARPANET were using it. It was later used by researchers at [[Bolt, Beranek, and Newman\|BBN]] to support the first [[router]]s on the experimental [[Internet]].
		+
		+	ELF went through major changes during development. ELF-I had an emphasis on high throughput at the expense of modularity. ELF-II improved modularity but reduced throughput. VM ELF moved applications out of kernel space to separate user spaces.

	{{semi-stub}}		{{semi-stub}}

@@ Line 22: / Line 22: @@
 * [https://www.saildart.org/ELF.JAM%5B11,DOC%5D ELF System Programmer's Guide]
 * ''An ARPANET Front-End for Large Computers'', in [https://escholarship.org/content/qt6hj390rb/qt6hj390rb_noSplash_f77c37d49a9b3274a8d62906c696e5fd.pdf Papers Presented at a Berkeley Workshop on Distributed Data Management and Computer Networks] - pp. 57-70
 [[Category: PDP-11 Operating Systems]]
 [[Category: Non-DEC Operating Systems]]