Difference between revisions of "MXV11-B Multifunction Option Module"

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It contains two [[asynchronous serial line]]s (using the [[DL11 asynchronous serial line interface|DL11]] programming standard), an optional [[clock]], a block of [[main memory]], and some [[read-only memory|PROM]] for [[bootstrap]] purposes. The serial lines are connected via 10-pin [[Berg connector]] headers on the top edge of the card, using the standard [[DEC asynchronous serial line pinout]], and line 1 can be set to [[halt]] or boot the machine on a [[Asynchronous serial line#Break|break]].
 
It contains two [[asynchronous serial line]]s (using the [[DL11 asynchronous serial line interface|DL11]] programming standard), an optional [[clock]], a block of [[main memory]], and some [[read-only memory|PROM]] for [[bootstrap]] purposes. The serial lines are connected via 10-pin [[Berg connector]] headers on the top edge of the card, using the standard [[DEC asynchronous serial line pinout]], and line 1 can be set to [[halt]] or boot the machine on a [[Asynchronous serial line#Break|break]].
  
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The clock is program-compatible with the [[KW11-L Line Time Clock]], but it is not a [[line time clock]], since it cannot be driven from [[alternating current|AC]] wall power; it can be connected to 50Hz, 60Hz, or 800Hz clock signals from a divided-down 20MHz crystal which is also used to provide the clock to the serial lines.
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The clock is [[program compatible]] with the [[KW11-L Line Time Clock]], but it is not a [[line time clock]], since it cannot be driven from [[alternating current|AC]] wall power; it can be connected to 50Hz, 60Hz, or 800Hz clock signals from a divided-down 20MHz crystal which is also used to provide the clock to the serial lines.
  
 
The board contains 128Kbytes of [[Random Access Memory|RAM]]; it can hold a pair of 2, 4, 8 or 16KB ROMs.
 
The board contains 128Kbytes of [[Random Access Memory|RAM]]; it can hold a pair of 2, 4, 8 or 16KB ROMs.
  
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[[Category: QBUS Serial Interfaces]]
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==Boot ROM usage==
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You can use the MXV11-B2 ROM chip set ([https://github.com/larsbrinkhoff/DECROMs 23-145E4-00 / 23-146E4-00]) to convert the MXV11-B into a boot module for [[QBUS]] [[PDP-11]]s capable of booting:
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* [[RL01]] / [[RL02]] (DL)
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* [[RX01]] / [[RX02]] (DX,DY)
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* [[TU58]] (DD)
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* [[TSV05]] (MS)
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* [[MSCP]] type Devices e.g. [[RD51]], [[RX50]] (DU)
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* [[DECnet]] via [[DPV11, [[DLV11-E]], [[DLV11-F]], [[DUV11]]
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==See also==
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* [[MXV11-A Multifunction Option Module]]
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<!-- ==Further reading==
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- not available online
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==External links==
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* [https://manx-docs.org/collections/antonio/dec/mxv1bug1.pdf MXV11-B Multi-Function Option Module User Guide] (EK-MXV1B-UG-001)
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* [http://www.bitsavers.org/pdf/dec/qbus/Digital_Microcomputer_Products_Handbook_1985.pdf Microcomputer Products Handbook] - the MXV11-B is covered on pp. 18&ndash;1-18 (pp. 253-270 of the PDF)
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* [http://www.kpxx.ru/FrainResearch/projects/pdp-11/micronotes/micronote19.txt Disabling RAM on the MXV11-BF] ([[MicroNote]] #019)
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* [http://www.arclightindustries.com/pics/MXV11-B.pdf MXV11-B Multifunction Option Module]
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* [http://www.kpxx.ru/FrainResearch/projects/pdp-11/multifunction.html Multifunction Modules]
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[[Category: QBUS Asynchronous Serial Interfaces]]
 
[[Category: QBUS Memories]]
 
[[Category: QBUS Memories]]
 
[[Category: QBUS ROMs]]
 
[[Category: QBUS ROMs]]

Latest revision as of 10:57, 26 August 2024

The MXV11-B Multifunction Option Module is a QBUS dual-height peripheral board (M7195), intended to allow the creation of complete systems in a minimal-sized QBUS backplane. It is very similar to the earlier MXV11-A Multifunction Option Module, except that it is a Q22 device.

It contains two asynchronous serial lines (using the DL11 programming standard), an optional clock, a block of main memory, and some PROM for bootstrap purposes. The serial lines are connected via 10-pin Berg connector headers on the top edge of the card, using the standard DEC asynchronous serial line pinout, and line 1 can be set to halt or boot the machine on a break.

The clock is program compatible with the KW11-L Line Time Clock, but it is not a line time clock, since it cannot be driven from AC wall power; it can be connected to 50Hz, 60Hz, or 800Hz clock signals from a divided-down 20MHz crystal which is also used to provide the clock to the serial lines.

The board contains 128Kbytes of RAM; it can hold a pair of 2, 4, 8 or 16KB ROMs.

Boot ROM usage

You can use the MXV11-B2 ROM chip set (23-145E4-00 / 23-146E4-00) to convert the MXV11-B into a boot module for QBUS PDP-11s capable of booting:

See also

External links

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