DM11-BA Modem Control Multiplexor - Revision history

Jnc: New cat scheme

2023-02-16T00:40:20Z

New cat scheme

Jnc: /* Further reading */ in fiche

2022-11-19T17:41:57Z

‎Further reading: in fiche

Jnc: also sync; +manual

2022-11-19T15:32:06Z

also sync; +manual

Jnc: New cat

2022-08-18T15:39:46Z

New cat

Jnc: fmt

2020-12-27T15:00:48Z

fmt

Jnc: Old on was not plug compatible

2020-12-27T14:59:31Z

Old on was not plug compatible

Jnc: + board img

2020-09-19T21:59:07Z

+ board img

Jnc: better punc

2020-02-11T08:33:49Z

better punc

Jnc: +pic, cables

2020-02-11T02:48:58Z

+pic, cables

Jnc: Expand a bit

2020-02-10T23:09:29Z

Expand a bit

@@ Line 17: / Line 17: @@
 * [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]]

@@ Line 11: / Line 11: @@
 ==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==

@@ 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.
+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 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.
 [[Category: UNIBUS Serial Interfaces]]
 [[Category: DEC Asynchronous Serial Interfaces]]

← Older revision		Revision as of 15:39, 18 August 2022
Line 9:		Line 9:

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

@@ 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 [[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 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.

@@ Line 5: / Line 5: @@
 [[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]]