DM11-BA Modem Control Multiplexor - Revision history

Jnc: Add link

2026-10-11T07:38:13Z

Add link

← Older revision		Revision as of 07:38, 11 October 2026
Line 5:		Line 5:
	It is a re-implementation of the [[DM11-BB Modem Control Option]]; however, instead of plugging into a controller [[backplane]] like the -BB, the -BA plugs into a standard [[UNIBUS]] [[Modified UNIBUS Device\|MUD]] slot. It is [[program compatible]] with the DM11-BB (although a single DM11-BA only supports 8 lines, unlike the DM11-BB, which handled 16).		It is a re-implementation of the [[DM11-BB Modem Control Option]]; however, instead of plugging into a controller [[backplane]] like the -BB, the -BA plugs into a standard [[UNIBUS]] [[Modified UNIBUS Device\|MUD]] slot. It is [[program compatible]] with the DM11-BB (although a single DM11-BA only supports 8 lines, unlike the DM11-BB, which handled 16).

	It is implemented as a single [[DEC card form factor\|hex]] [[printed circuit board\|board]], the '''M8640'''. Its [[interrupt vector]] and [[register]] [[address]]es are set by a pair of [[DIP switch]]es (and a [[jumper]] (W1) for one bit of the address, on [[etch]] revision B boards). A [[ ‎UNIBUS priority plug]] is also present.		It is implemented as a single [[DEC card form factor\|hex]] [[printed circuit board\|board]], the '''M8640'''. Its [[interrupt vector]] and [[register]] [[address]]es are set by a pair of [[DIP switch]]es (and a [[jumper]] (W1) for one bit of the address, on [[etch]] revision B boards). A [[‎UNIBUS priority plug]] is also present.

	It connects, using two [[flat cable]]s plugged into [[Berg connector\|Berg headers]] on the board, to a passive distribution panel; either the H317-M or the functionally identical H317-P (the latter has improved [[Interference\|EMI]] shielding).		It connects, using two [[flat cable]]s plugged into [[Berg connector\|Berg headers]] on the board, to a passive [[distribution panel]]; either the H317-M or the functionally identical H317-P (the latter has improved [[Interference\|EMI]] shielding).

	==Further reading==		==Further reading==

Jnc: /* External links */ Manx mirror of Antonio's stuff is gone

2026-10-11T07:35:27Z

External links: Manx mirror of Antonio's stuff is gone

← Older revision		Revision as of 07:35, 11 October 2026
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	==External links==		==External links==

	* [https://~~manx-docs~~.~~org~~/~~collections~~/antonio~~/dec~~/kmsbeug1.pdf KMS11-BD/BE Synchronous Communication Processor User Guide] (EK-KMSBE-UG-001) - contains moderately detailed information on the DM11-BA in various places		* [https://vt100.net/mirror/antonio/kmsbeug1.pdf KMS11-BD/BE Synchronous Communication Processor User Guide] (EK-KMSBE-UG-001) - contains moderately detailed information on the DM11-BA in various places

	[[Category: UNIBUS Asynchronous Serial Interfaces]]		[[Category: UNIBUS Asynchronous Serial Interfaces]]
	[[Category: UNIBUS Synchronous Serial Interfaces]]		[[Category: UNIBUS Synchronous Serial Interfaces]]

Jnc: New cat scheme

2023-02-16T00:40:20Z

New cat scheme

← Older revision		Revision as of 00:40, 16 February 2023
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	* [https://manx-docs.org/collections/antonio/dec/kmsbeug1.pdf KMS11-BD/BE Synchronous Communication Processor User Guide] (EK-KMSBE-UG-001) - contains moderately detailed information on the DM11-BA in various places		* [https://manx-docs.org/collections/antonio/dec/kmsbeug1.pdf KMS11-BD/BE Synchronous Communication Processor User Guide] (EK-KMSBE-UG-001) - contains moderately detailed information on the DM11-BA in various places

	[[Category: UNIBUS ~~Serial Interfaces]]~~		[[Category: UNIBUS Asynchronous Serial Interfaces]]
	~~[[Category: DEC~~ Asynchronous Serial Interfaces]]		[[Category: UNIBUS Synchronous Serial Interfaces]]
	[[Category: ~~DEC~~ Synchronous Serial Interfaces]]

Jnc: /* Further reading */ in fiche

2022-11-19T17:41:57Z

Jnc: also sync; +manual

2022-11-19T15:32:06Z

also sync; +manual

← Older revision		Revision as of 15:32, 19 November 2022
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	[[Image:DM11-BA_M8640.jpg\|thumb\|right\|300px\|DM11-BA M8640 board]]		[[Image:DM11-BA_M8640.jpg\|thumb\|right\|300px\|DM11-BA M8640 board]]

	The '''DM11-BA Modem Control Multiplexor''' allows [[asynchronous serial line]]s connected to a [[UNIBUS]] [[device controller]] to be connected to [[modem]]s. It could be set to [[interrupt]] the [[Central Processing Unit\|CPU]] when a modem control line (Ring, Carrier, etc) changed state.		The '''DM11-BA Modem Control Multiplexor''' allows [[synchronous serial line\|synchronous]] and [[asynchronous serial line]]s connected to a [[UNIBUS]] [[device controller]] to be connected to [[modem]]s. It could be set to [[interrupt]] the [[Central Processing Unit\|CPU]] when a modem control line (Ring, Carrier, etc) changed state.

	It is a re-implementation of the [[DM11-BB Modem Control Option]]; instead of plugging into a controller [[backplane]] like the -BB, the -BA plugs into a standard [[UNIBUS]] [[Modified UNIBUS Device\|MUD]] slot.		It is a re-implementation of the [[DM11-BB Modem Control Option]]; however, instead of plugging into a controller [[backplane]] like the -BB, the -BA plugs into a standard [[UNIBUS]] [[Modified UNIBUS Device\|MUD]] slot. It is [[program compatible]] with the DM11-BB (although a single DM11-BA only supports 8 lines, unlike the DM11-BB, which handled 16).
	It is [[program compatible]] with the DM11-BB (although a single DM11-BA only supports 8 lines, unlike the DM11-BB, which handled 16)~~, and is implemented as a single [[DEC card form factor\|hex]] [[printed circuit board\|board]], the '''M8640'''~~.

	It connects, using two [[flat cable]]s plugged into [[Berg connector\|Berg headers]] on the board, to a passive distribution panel; either the H317-M or the functionally identical H317-P (the latter has improved [[Interference\|EMI]] shielding).		It is implemented as a single [[DEC card form factor\|hex]] [[printed circuit board\|board]], the '''M8640'''. Its [[interrupt vector]] and [[register]] [[address]]es are set by a pair of [[DIP switch]]es (and a [[jumper]] (W1) for one bit of the address, on [[etch]] revision B boards). A [[ ‎UNIBUS priority plug]] is also present.

			It connects, using two [[flat cable]]s plugged into [[Berg connector\|Berg headers]] on the board, to a passive distribution panel; either the H317-M or the functionally identical H317-P (the latter has improved [[Interference\|EMI]] shielding).

			==Further reading==

			* ''DM11-BA Modem Control Multiplexor'' (YM-C138C-00) - not online

			==External links==

			* [https://manx-docs.org/collections/antonio/dec/kmsbeug1.pdf KMS11-BD/BE Synchronous Communication Processor User Guide] (EK-KMSBE-UG-001) - contains moderately detailed information on the DM11-BA in various places

	[[Category: UNIBUS Serial Interfaces]]		[[Category: UNIBUS Serial Interfaces]]
	[[Category: DEC Asynchronous Serial Interfaces]]		[[Category: DEC Asynchronous Serial Interfaces]]
			[[Category: DEC Synchronous Serial Interfaces]]

Jnc: New cat

2022-08-18T15:39:46Z

New cat

← Older revision		Revision as of 15:39, 18 August 2022
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	[[Category: UNIBUS Serial Interfaces]]		[[Category: UNIBUS Serial Interfaces]]
			[[Category: DEC Asynchronous Serial Interfaces]]

Jnc: fmt

2020-12-27T15:00:48Z

fmt

← Older revision		Revision as of 15:00, 27 December 2020
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	[[Image:DM11-BA_M8640.jpg\|thumb\|right\|300px\|DM11-BA M8640 board]]		[[Image:DM11-BA_M8640.jpg\|thumb\|right\|300px\|DM11-BA M8640 board]]

	The '''DM11-BA Modem Control Multiplexor''' allows [[asynchronous serial line]]s connected to a [[UNIBUS]] [[device controller]] to be connected to [[modem]]s. It could be set to [[interrupt]] the [[Central Processing Unit\|CPU]] when a modem control line (Ring, Carrier, etc) changed state. It is a re-implementation of the [[DM11-BB Modem Control Option]]; instead of plugging into a controller [[backplane]] like the -BB, the -BA plugs into a standard [[UNIBUS]] [[Modified UNIBUS Device\|MUD]] slot.		The '''DM11-BA Modem Control Multiplexor''' allows [[asynchronous serial line]]s connected to a [[UNIBUS]] [[device controller]] to be connected to [[modem]]s. It could be set to [[interrupt]] the [[Central Processing Unit\|CPU]] when a modem control line (Ring, Carrier, etc) changed state.

			It is a re-implementation of the [[DM11-BB Modem Control Option]]; instead of plugging into a controller [[backplane]] like the -BB, the -BA plugs into a standard [[UNIBUS]] [[Modified UNIBUS Device\|MUD]] slot.
	It is [[program compatible]] with the DM11-BB (although a single DM11-BA only supports 8 lines, unlike the DM11-BB, which handled 16), and is implemented as a single [[DEC card form factor\|hex]] [[printed circuit board\|board]], the '''M8640'''.		It is [[program compatible]] with the DM11-BB (although a single DM11-BA only supports 8 lines, unlike the DM11-BB, which handled 16), and is implemented as a single [[DEC card form factor\|hex]] [[printed circuit board\|board]], the '''M8640'''.

Jnc: Old on was not plug compatible

2020-12-27T14:59:31Z

Old on was not plug compatible

← Older revision		Revision as of 14:59, 27 December 2020
Line 5:		Line 5:
	It is [[program compatible]] with the DM11-BB (although a single DM11-BA only supports 8 lines, unlike the DM11-BB, which handled 16), and is implemented as a single [[DEC card form factor\|hex]] [[printed circuit board\|board]], the '''M8640'''.		It is [[program compatible]] with the DM11-BB (although a single DM11-BA only supports 8 lines, unlike the DM11-BB, which handled 16), and is implemented as a single [[DEC card form factor\|hex]] [[printed circuit board\|board]], the '''M8640'''.

	~~[[Image:H317BUncovered.jpg\|thumb\|left\|300px\|H317-B with cover off]]~~		It connects, using two [[flat cable]]s plugged into [[Berg connector\|Berg headers]] on the board, to a passive distribution panel; either the H317-M or the functionally identical H317-P (the latter has improved [[Interference\|EMI]] shielding).

	It connects, using two [[flat cable]]s plugged into [[Berg connector\|Berg headers]] on the board, to a passive distribution panel; either ~~one usable with the DM11-BB (such as the H317-B), or~~ the ~~newer~~ H317-M or the functionally identical H317-P (the latter has improved [[Interference\|EMI]] shielding).

	[[Category: UNIBUS Serial Interfaces]]		[[Category: UNIBUS Serial Interfaces]]

Jnc: + board img

2020-09-19T21:59:07Z

+ board img

← Older revision		Revision as of 21:59, 19 September 2020
Line 1:		Line 1:
			[[Image:DM11-BA_M8640.jpg\|thumb\|right\|300px\|DM11-BA M8640 board]]

	The '''DM11-BA Modem Control Multiplexor''' allows [[asynchronous serial line]]s connected to a [[UNIBUS]] [[device controller]] to be connected to [[modem]]s. It could be set to [[interrupt]] the [[Central Processing Unit\|CPU]] when a modem control line (Ring, Carrier, etc) changed state. It is a re-implementation of the [[DM11-BB Modem Control Option]]; instead of plugging into a controller [[backplane]] like the -BB, the -BA plugs into a standard [[UNIBUS]] [[Modified UNIBUS Device\|MUD]] slot.		The '''DM11-BA Modem Control Multiplexor''' allows [[asynchronous serial line]]s connected to a [[UNIBUS]] [[device controller]] to be connected to [[modem]]s. It could be set to [[interrupt]] the [[Central Processing Unit\|CPU]] when a modem control line (Ring, Carrier, etc) changed state. It is a re-implementation of the [[DM11-BB Modem Control Option]]; instead of plugging into a controller [[backplane]] like the -BB, the -BA plugs into a standard [[UNIBUS]] [[Modified UNIBUS Device\|MUD]] slot.

Jnc: better punc

2020-02-11T08:33:49Z

better punc

← Older revision		Revision as of 08:33, 11 February 2020
Line 5:		Line 5:
	[[Image:H317BUncovered.jpg\|thumb\|left\|300px\|H317-B with cover off]]		[[Image:H317BUncovered.jpg\|thumb\|left\|300px\|H317-B with cover off]]

	It connects, using two [[flat cable]]s plugged into [[Berg connector\|Berg headers]] on the board, to a passive distribution panel, either one usable with the DM11-BB (such as the H317-B); or the newer H317-M or the functionally identical H317-P (the latter has improved [[Interference\|EMI]] shielding).		It connects, using two [[flat cable]]s plugged into [[Berg connector\|Berg headers]] on the board, to a passive distribution panel; either one usable with the DM11-BB (such as the H317-B), or the newer H317-M or the functionally identical H317-P (the latter has improved [[Interference\|EMI]] shielding).

	[[Category: UNIBUS Serial Interfaces]]		[[Category: UNIBUS Serial Interfaces]]

← Older revision		Revision as of 15:00, 27 December 2020
Line 1:		Line 1:
	[[Image:DM11-BA_M8640.jpg\|thumb\|right\|300px\|DM11-BA M8640 board]]		[[Image:DM11-BA_M8640.jpg\|thumb\|right\|300px\|DM11-BA M8640 board]]

	The '''DM11-BA Modem Control Multiplexor''' allows [[asynchronous serial line]]s connected to a [[UNIBUS]] [[device controller]] to be connected to [[modem]]s. It could be set to [[interrupt]] the [[Central Processing Unit\|CPU]] when a modem control line (Ring, Carrier, etc) changed state. It is a re-implementation of the [[DM11-BB Modem Control Option]]; instead of plugging into a controller [[backplane]] like the -BB, the -BA plugs into a standard [[UNIBUS]] [[Modified UNIBUS Device\|MUD]] slot.		The '''DM11-BA Modem Control Multiplexor''' allows [[asynchronous serial line]]s connected to a [[UNIBUS]] [[device controller]] to be connected to [[modem]]s. It could be set to [[interrupt]] the [[Central Processing Unit\|CPU]] when a modem control line (Ring, Carrier, etc) changed state.

			It is a re-implementation of the [[DM11-BB Modem Control Option]]; instead of plugging into a controller [[backplane]] like the -BB, the -BA plugs into a standard [[UNIBUS]] [[Modified UNIBUS Device\|MUD]] slot.
	It is [[program compatible]] with the DM11-BB (although a single DM11-BA only supports 8 lines, unlike the DM11-BB, which handled 16), and is implemented as a single [[DEC card form factor\|hex]] [[printed circuit board\|board]], the '''M8640'''.		It is [[program compatible]] with the DM11-BB (although a single DM11-BA only supports 8 lines, unlike the DM11-BB, which handled 16), and is implemented as a single [[DEC card form factor\|hex]] [[printed circuit board\|board]], the '''M8640'''.

← Older revision		Revision as of 17:41, 19 November 2022
Line 11:		Line 11:
	==Further reading==		==Further reading==

	* ''DM11-BA Modem Control Multiplexor'' (YM-C138C-00) - not online		* ''DM11-BA Modem Control Multiplexor'' (YM-C138C-00) - not available online, but in fiche

	==External links==		==External links==