Tymshare Base-Host Protocol - Revision history

Larsbrinkhoff: Link to SUMEX-AIM.

2023-06-10T06:26:18Z

Link to SUMEX-AIM.

← Older revision		Revision as of 06:26, 10 June 2023
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	\|}		\|}

	This information comes from the SUMEX-AIM monitor file TYMSRV.MAC, written by Michael A. Heathman in 1975. Additional updates from the [[SRI-NIC]] version from 1982.		This information comes from the [[SUMEX-AIM]] monitor file TYMSRV.MAC, written by Michael A. Heathman in 1975. Additional updates from the [[SRI-NIC]] version from 1982.

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

Jnc: /* External links */ Better cat

2022-06-09T13:40:01Z

External links: Better cat

← Older revision		Revision as of 13:40, 9 June 2022
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	This information comes from the SUMEX-AIM monitor file TYMSRV.MAC, written by Michael A. Heathman in 1975. Additional updates from the [[SRI-NIC]] version from 1982.		This information comes from the SUMEX-AIM monitor file TYMSRV.MAC, written by Michael A. Heathman in 1975. Additional updates from the [[SRI-NIC]] version from 1982.

			{{semi-stub}}

	==External links==		==External links==
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	* [https://github.com/TYMCOM-X/169281.tape/blob/61a4c1fcd77c19952506cd141ca9bb9dd0adfd4c/fremontdoc/tbase.doc (FREMONTDOC)TBASE.DOC] - TYMCOM-X documenting the Tymeshare Base-Host Protocol.		* [https://github.com/TYMCOM-X/169281.tape/blob/61a4c1fcd77c19952506cd141ca9bb9dd0adfd4c/fremontdoc/tbase.doc (FREMONTDOC)TBASE.DOC] - TYMCOM-X documenting the Tymeshare Base-Host Protocol.

	~~{{semi-stub}}~~		[[Category: Network Protocols]]

	[[Category: ~~Networking~~]]

Jnc: Add some more links; typos

2022-04-29T00:15:28Z

Add some more links; typos

← Older revision		Revision as of 00:15, 29 April 2022
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	[[Image:Tymnet-man1.jpg\|thumb\|right\|Humorous visualization of Tymnet protocol]]		[[Image:Tymnet-man1.jpg\|thumb\|right\|Humorous visualization of Tymnet protocol]]

	This documents the [[protocol]], as used around 1975-1982, between a [[PDP-10]] [[host]] and Varian 620 TymBAS. At a low level, the interface consists of shared memory; one page (512 words) at address 02000 (octal). The memory has some [[meta-data]] and [[ring buffer]]s for input and output. The host and the TymBAS regularly poll this memory for updates.		This documents the [[protocol]], as used around 1975-1982, between a [[PDP-10]] [[host]] and Varian 620 TymBAS. At a low level, the interface consists of [[shared memory]]; one page (512 words) at [[address]] 02000 (octal). The memory has some [[meta-data]] and [[ring buffer]]s for input and output. The host and the TymBAS regularly poll this memory for updates.

	Messages are transmitted from the PDP-10 as 36-bit ~~words~~ with four [[octet]]s in bits 0-31. Bits 32-35 are unused.		Messages are transmitted from the PDP-10 as 36-bit [[word]]s with four [[octet]]s in bits 0-31. Bits 32-35 are unused.

	Message types A, B, C, and D are just 4 octets.		Message types A, B, C, and D are just 4 octets.
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	\|}		\|}

	Type G messages have a variable number of octets. The message number is 0200 (octal) plus the number of data octets following the 16-bit header. The last word is padded out to a 36-bit boundary.		Type G messages have a variable number of octets. The message number is 0200 (octal) plus the number of data octets following the 16-bit [[header]]. The last word is padded out to a 36-bit boundary.

	{\| class="wikitable"		{\| class="wikitable"
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	\| B		\| B
	\| BOC		\| BOC
	\| Block ~~ouptut~~ complete.		\| Block output complete.
	\|-		\|-
	\| 46		\| 46
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	\| B		\| B
	\| IRQ		\| IRQ
	\| ~~Requst~~ block input termination.		\| Request block input termination.
	\|-		\|-
	\| 53		\| 53
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	\| Enter alt output device mode.		\| Enter alt output device mode.
	\|-		\|-
	\| ~~200~~+''n''		\| 0200+''n''
	\| G		\| G
	\|		\|

Larsbrinkhoff: Larsbrinkhoff moved page Tymnet protocol to Tymshare Base-Host Protocol: Update name to reflect Tymeshare documentation.

2022-04-28T20:00:10Z

Larsbrinkhoff moved page Tymnet protocol to Tymshare Base-Host Protocol: Update name to reflect Tymeshare documentation.

← Older revision		Revision as of 20:00, 28 April 2022
(No difference)

Larsbrinkhoff: Two links.

2022-04-28T17:30:56Z

Two links.

← Older revision		Revision as of 17:30, 28 April 2022
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	This information comes from the SUMEX-AIM monitor file TYMSRV.MAC, written by Michael A. Heathman in 1975. Additional updates from the [[SRI-NIC]] version from 1982.		This information comes from the SUMEX-AIM monitor file TYMSRV.MAC, written by Michael A. Heathman in 1975. Additional updates from the [[SRI-NIC]] version from 1982.

			==External links==

			* [http://cap-lore.com/Tymnet/ Tymnet information from Norman Hardy]
			* [https://github.com/TYMCOM-X/169281.tape/blob/61a4c1fcd77c19952506cd141ca9bb9dd0adfd4c/fremontdoc/tbase.doc (FREMONTDOC)TBASE.DOC] - TYMCOM-X documenting the Tymeshare Base-Host Protocol.

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

	[[Category: Networking]]		[[Category: Networking]]

Larsbrinkhoff: It seems "TymBAS" is the official spelling.

2022-04-28T17:20:35Z

It seems "TymBAS" is the official spelling.

← Older revision		Revision as of 17:20, 28 April 2022
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	[[Image:Tymnet-man1.jpg\|thumb\|right\|Humorous visualization of Tymnet protocol]]		[[Image:Tymnet-man1.jpg\|thumb\|right\|Humorous visualization of Tymnet protocol]]

	This documents the [[protocol]], as used around 1975-1982, between a [[PDP-10]] [[host]] and Varian 620 ~~Tymbase~~. At a low level, the interface consists of shared memory; one page (512 words) at address 02000 (octal). The memory has some [[meta-data]] and [[ring buffer]]s for input and output. The host and the ~~Tymbase~~ regularly poll this memory for updates.		This documents the [[protocol]], as used around 1975-1982, between a [[PDP-10]] [[host]] and Varian 620 TymBAS. At a low level, the interface consists of shared memory; one page (512 words) at address 02000 (octal). The memory has some [[meta-data]] and [[ring buffer]]s for input and output. The host and the TymBAS regularly poll this memory for updates.

	Messages are transmitted from the PDP-10 as 36-bit words with four [[octet]]s in bits 0-31. Bits 32-35 are unused.		Messages are transmitted from the PDP-10 as 36-bit words with four [[octet]]s in bits 0-31. Bits 32-35 are unused.

Jnc: Add a bunch of links; also, too long to be a plain stub :-)

2022-04-28T12:29:50Z

Add a bunch of links; also, too long to be a plain stub :-)

← Older revision		Revision as of 12:29, 28 April 2022
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	~~{{stub}}~~

	[[Image:Tymnet-man1.jpg\|thumb\|right\|Humorous visualization of Tymnet protocol]]		[[Image:Tymnet-man1.jpg\|thumb\|right\|Humorous visualization of Tymnet protocol]]

	This documents the protocol, as used around 1975-1982, between a PDP-10 host and Varian 620 Tymbase. At a low level, the interface consists of shared memory; one page (512 words) at address ~~2000~~ (octal). The memory has some ~~metadata~~ and ring ~~buffers~~ for input and output. The host and the Tymbase regularly poll this memory for updates.		This documents the [[protocol]], as used around 1975-1982, between a [[PDP-10]] [[host]] and Varian 620 Tymbase. At a low level, the interface consists of shared memory; one page (512 words) at address 02000 (octal). The memory has some [[meta-data]] and [[ring buffer]]s for input and output. The host and the Tymbase regularly poll this memory for updates.

	Messages are transmitted from the PDP-10 as 36-bit words with four ~~octets~~ in bits 0-31. Bits 32-35 are unused.		Messages are transmitted from the PDP-10 as 36-bit words with four [[octet]]s in bits 0-31. Bits 32-35 are unused.

	Message types A, B, C, and D are just 4 octets.		Message types A, B, C, and D are just 4 octets.
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	\|}		\|}

	Type G messages have a variable number of octets. The message number is ~~200~~ (octal) plus the number of data octets following the 16-bit header. The last word is padded out to a 36-bit boundary.		Type G messages have a variable number of octets. The message number is 0200 (octal) plus the number of data octets following the 16-bit header. The last word is padded out to a 36-bit boundary.

	{\| class="wikitable"		{\| class="wikitable"
Line 317:		Line 315:
	\|}		\|}

	This information comes from the SUMEX-AIM monitor file TYMSRV.MAC, written by Michael A. Heathman in 1975. Additional updates from the SRI-NIC version from 1982.		This information comes from the SUMEX-AIM monitor file TYMSRV.MAC, written by Michael A. Heathman in 1975. Additional updates from the [[SRI-NIC]] version from 1982.

			{{semi-stub}}

	[[Category: Networking]]		[[Category: Networking]]

Larsbrinkhoff: Type G length does not include the header.

2022-04-28T11:52:23Z

Type G length does not include the header.

← Older revision		Revision as of 11:52, 28 April 2022
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	\|}		\|}

	Type G messages have a variable number of octets. The message number is 200 (octal) plus the ~~total~~ number of octets in the ~~message, including~~ header.		Type G messages have a variable number of octets. The message number is 200 (octal) plus the number of data octets following the 16-bit header. The last word is padded out to a 36-bit boundary.

	{\| class="wikitable"		{\| class="wikitable"

Larsbrinkhoff: Padding.

2022-04-28T07:23:33Z

Padding.

← Older revision		Revision as of 07:23, 28 April 2022
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	\| colspan="4" \| Data as per ''n''		\| colspan="4" \| Data as per ''n''
	\|-		\|-
	\| colspan="4" \| ...		\| colspan="3" \| ...
			\| Padding
	\|}		\|}

Larsbrinkhoff: Brief description of the shared memory interface.

2022-04-28T07:20:53Z

Brief description of the shared memory interface.

← Older revision		Revision as of 07:20, 28 April 2022
Line 3:		Line 3:
	[[Image:Tymnet-man1.jpg\|thumb\|right\|Humorous visualization of Tymnet protocol]]		[[Image:Tymnet-man1.jpg\|thumb\|right\|Humorous visualization of Tymnet protocol]]

	This documents the protocol, as used around 1975-1982, between a PDP-10 host and Varian 620 Tymbase.		This documents the protocol, as used around 1975-1982, between a PDP-10 host and Varian 620 Tymbase. At a low level, the interface consists of shared memory; one page (512 words) at address 2000 (octal). The memory has some metadata and ring buffers for input and output. The host and the Tymbase regularly poll this memory for updates.

	Messages are transmitted from the PDP-10 as 36-bit words with four octets in bits 0-31. Bits 32-35 are unused.		Messages are transmitted from the PDP-10 as 36-bit words with four octets in bits 0-31. Bits 32-35 are unused.