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2023-02-16T01:39:28Z

New cat scheme

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2022-08-15T19:20:52Z

New cat

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2021-08-25T19:09:59Z

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The '''DMV11 Synchronous Controller''' (more fully, the '''DMV11 Intelligent Communications Synchronous Line Controller''') is a multi-line [[synchronous serial line]] [[peripheral|interface]] for the [[QBUS]]. It used [[Direct Memory Access|DMA]] to transfer data. It could operate in either [[half-duplex]] or [[full-duplex]], at [[baud rate]]s up to 56K bits/second (depending on [[software]] and system configuration), and supported both point-point and multi-point operation.

The [[byte]]-oriented [[DDCMP]] line [[protocol]] was supported; a [[microprocessor]] is used to implement the protocol.


It was a [[DEC card form factor|quad]] card; [[Berg connector|Berg headers]] on the card connected to [[flat cable]]s which led off to the modem connectors. There were 4 models, the -AP, -BP, and -FP used the M8053 card, and the -CP used the M8064. (Earlier, there were 3 models; the -AA, -AB, and -AC.) They supported the following interface standards:

{| class="wikitable"
! Model !! Interface
|-
| -AP || [[EIA RS-232 serial line interface|EIA RS-232C]]/CCITT V.28
|-
| -BP || CCITT V.35
|-
| -CP || Integral modem
|-
| -FP || [[RS-423|EIA RS-423A]]/CCITT V.24
|}

==Registers==

{| border=1
! Register !! Abbreviation !! Address
|-
|Control and Status Register || SEL0 || 16xxx0
|-
|Control/Response Code Register || BSEL2 || 16xxx2
|-
|Tributary Address || BSEL3 || 16xxx3
|-
|Command/Response Register || SEL4 || 16xxx4
|-
|Command/Response Register || SEL6 || 16xxx6
|}

[[Address]]es are assigned from the [[floating device address space]].

{{semi-stub}}

==See also==

* [[DUV11 Line Interface]]
* [[DPV11 synchronous serial line interface]]

==External links==

* [http://www.bitsavers.org/www.computer.museum.uq.edu.au/pdf/EK-DMVQM-UG-001%20QMA%20DMV11%20Synchronous%20Controller%20User's%20Guide.pdf EK-DMVQM-UG-001 QMA DMV11 Synchronous Controller User's Guide]
* [http://www.bitsavers.org/pdf/dec/qbus/EK-DMV11-TM-001_DMV11_Synchronous_Controller_Technical_Manual_Sep81.pdf EK-DMV11-TM-001 DMV11 Synchronous Controller Technical Manual]

[[Category: QBUS Serial Interfaces]]

← Older revision		Revision as of 01:39, 16 February 2023
Line 54:		Line 54:
	* [http://www.bitsavers.org/pdf/dec/qbus/EK-DMV11-TM-001_DMV11_Synchronous_Controller_Technical_Manual_Sep81.pdf EK-DMV11-TM-001 DMV11 Synchronous Controller Technical Manual]		* [http://www.bitsavers.org/pdf/dec/qbus/EK-DMV11-TM-001_DMV11_Synchronous_Controller_Technical_Manual_Sep81.pdf EK-DMV11-TM-001 DMV11 Synchronous Controller Technical Manual]

−	[[Category: QBUS ~~Serial Interfaces]]~~	+	[[Category: QBUS Synchronous Serial Interfaces]]
−	~~[[Category: DEC~~ Synchronous Serial Interfaces]]

← Older revision		Revision as of 19:20, 15 August 2022
Line 55:		Line 55:

	[[Category: QBUS Serial Interfaces]]		[[Category: QBUS Serial Interfaces]]
		+	[[Category: DEC Synchronous Serial Interfaces]]

DMV11 Synchronous Controller - Revision history

Jnc: New cat scheme

Jnc: New cat

Jnc: Pretty stubby, but it's a start