https://gunkies.org/index.php?action=history&feed=atom&title=DMP11_Synchronous_Controller 2026-05-04T17:47:12Z Revision history for this page on the wiki MediaWiki 1.30.1 https://gunkies.org/w/index.php?title=DMP11_Synchronous_Controller&diff=29390&oldid=prev 2023-05-13T22:21:34Z

<p>Covers the basics</p> <p><b>New page</b></p><div>The '''DMP11 Synchronous Controller''' is a [[microprocessor]]-based intelligent multi-point [[synchronous serial line]] [[peripheral|interface]] for the [[UNIBUS]]. It uses [[Direct Memory Access|DMA]] to transfer data to and from [[main memory]]. The DMP11 can operate in either [[half-duplex]] or [[full-duplex]], at [[baud rate]]s up to 1M bits/second (half-duplex) or 512K bits/second (full-duplex); when operating as a control station, it can control up to 32 tributary stations. <br /> <br /> It consists of two [[DEC card form factor|hex]] boards:<br /> <br /> * a microprocessor module (M8207-YA)<br /> * a line module (M8203), which can be configured to one of 4 choices via [[jumper]]s and [[DIP switch]]es, one of:<br /> ** DMP11-AA [[EIA RS-232 serial line interface|RS-232]] or [[RS-423]] or [[null modem]] (up to 9.6K bps)<br /> ** DMP11-AB [[V.35]]<br /> ** DMP11-AC integral [[modem]] (56K, 1M bps)<br /> ** DMP11-AE [[EIA RS-422 serial line interface|RS-422]]<br /> <br /> Both plug into [[Small Peripheral Controller|SPC]] slots, preferably adjacent; the two boards communicate over a BC08S [[flat cable]]. The [[device driver]] communicates with the DMP11 via four control and status [[register]]s.<br /> <br /> It supports [[Digital Data Communications Message Protocol|DDCMP]] (version 4.0), including support for [[cyclic redundancy check|CRCs]].<br /> <br /> {{semi-stub}}<br /> <br /> ==See also==<br /> <br /> * [[DMR11 Synchronous Controller]]<br /> <br /> ==Further reading==<br /> <br /> * ''DMP11 Field Maintenance Print Set'' (MP-00795 - not online)<br /> <br /> ==External links==<br /> <br /> * [http://www.bitsavers.org/pdf/dec/unibus/EK-DMP11-TM-001_DMP11_Synchronous_Controller_Technical_Manual_Sep81.pdf DMP11 Synchronous Controller Technical Manual] (EK-DMP11-TM-001)<br /> * [http://bitsavers.org/pdf/dec/unibus/EK-M8207-TM-002_M8207_Microprocessor_Technical_Manual_198211.pdf M8207 Microprocessor Technical Manual] (EK-M8207-TM-002)<br /> * [http://bitsavers.org/pdf/dec/unibus/EK-M8203-TM-002_M8203_Line_Unit_Technical_Manual_198103.pdf M8203 Line Unit Technical Manual] (EK-M8203-TM-002)<br /> <br /> [[Category: UNIBUS Synchronous Serial Interfaces]]</div>

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