TOPS-20: Difference between revisions

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{{Infobox OS
{{Infobox OS
| name = TOPS-20
| name = TOPS-20
| creator = [[DEC]]
| year introduced = 1976
| type = Multi-tasking, multi-user, virtual memory
| architecture = [[PDP-10]]
| architecture = [[PDP-10]]
}}
}}


'''TOPS-20''' is an [[operating system]] for the [[PDP-10]], [[DECSYSTEM-20]]. It was descended from [[TENEX]], an operating system for a modified version of the earlier [[KA10]] PDP-10; hence its nickname of '''TWENEX'''.
'''TOPS-20''' is an [[operating system]] for the [[PDP-10]], [[DECSYSTEM-20]]. It was descended from [[TENEX]], an operating system for a modified version of the earlier [[KA10]] PDP-10; hence its nickname of '''TWENEX'''.
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==Networking==
==Networking==


TOPS-20 can work with DECnet and with TCP/IP. It was a popular machine on the Internet during its early days (1980s).
TOPS-20 can work with [[DECnet]] and with [[TCP/IP]]. It was a popular machine on the [[Internet]] during its early days (1980s).


MIT added support for [[CHAOSnet]].
MIT added support for [[Chaosnet|Chaos]].


==Devices==
==Devices==
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*[[Running TOPS-20 V4.1 under SIMH]]
*[[Running TOPS-20 V4.1 under SIMH]]
*[https://www.sky-visions.com/dec/tops20.shtml Running TOPS-20 V3A and V7.1 under SIMH]
==External links==
* [https://opost.com/tenex/ TECO, TENEX, and TOPS-20 Papers] - from Dan Murphy, includes assorted memorabilia such as images
** [https://opost.com/tenex/hbook.html Origins and Development of TOPS-20]
* [https://ieeexplore.ieee.org/document/7057591 TENEX and TOPS-20] - recent update of the above
* Phil Budne's [https://www.ultimate.com/phil/pdp10/tops-20 TOPS-20 Evolution]
* [https://www.inwap.com/pdp10/tops-history.txt The History of TOPS, or Life in the Fast AC's]


[[Category: PDP-10 Operating Systems]]
[[Category: PDP-10 Operating Systems]]
[[Category: DEC Operating Systems]]
[[Category: DEC Operating Systems]]

Latest revision as of 16:30, 28 June 2024


TOPS-20
Type: Multi-tasking, multi-user, virtual memory
Creator: DEC
Architecture: PDP-10
Date Released: 1976


TOPS-20 is an operating system for the PDP-10, DECSYSTEM-20. It was descended from TENEX, an operating system for a modified version of the earlier KA10 PDP-10; hence its nickname of TWENEX.

Basic Use

Networking

TOPS-20 can work with DECnet and with TCP/IP. It was a popular machine on the Internet during its early days (1980s).

MIT added support for Chaos.

Devices

How to get this running

TOPS-20 can run under emulation in SIMH, KLH10, and kx10.

External links