DR11-C general device interface - Revision history

Jnc: /* External links */ Bitsavers has reorganized a bit

2026-10-08T00:31:08Z

External links: Bitsavers has reorganized a bit

← Older revision		Revision as of 00:31, 8 October 2026
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	* [http://www.bitsavers.org/www.computer.museum.uq.edu.au/pdf/DEC-11-HDRCA-C-D%20DR11-C%20General%20Device%20Interface%20Manual.pdf DR11-C general device interface manual] (DEC-11-HDRCA-C-D)		* [http://www.bitsavers.org/www.computer.museum.uq.edu.au/pdf/DEC-11-HDRCA-C-D%20DR11-C%20General%20Device%20Interface%20Manual.pdf DR11-C general device interface manual] (DEC-11-HDRCA-C-D)
	* [http://www.bitsavers.org/pdf/dec/unibus/EK-DR11C-TM-004_DR11-C_General_Device_Interface_Manual_Jun74.pdf DR11-C general device interface manual] (EK-DR11C-TM-004)		* [http://www.bitsavers.org/pdf/dec/unibus/DR11-C/EK-DR11C-TM-004_DR11-C_General_Device_Interface_Manual_Jun74.pdf DR11-C general device interface manual] (EK-DR11C-TM-004)
	* [http://www.bitsavers.org/pdf/dec/unibus/DR11-C_EngrDrws.pdf DR11-C general device interface engineering drawings]		* [http://www.bitsavers.org/pdf/dec/unibus/DR11-C/DR11-C_EngrDrws.pdf DR11-C general device interface engineering drawings]

	[[Category: UNIBUS Parallel Interfaces]]		[[Category: UNIBUS Parallel Interfaces]]

Jnc: /* External links */ +manuals, engdrwngs

2022-11-24T21:26:34Z

External links: +manuals, engdrwngs

← Older revision		Revision as of 21:26, 24 November 2022
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	[[Image:DR11-C.jpeg\|thumb\|200px\|right\|DR11-C board]]		[[Image:DR11-C.jpeg\|thumb\|200px\|right\|DR11-C board]]

	The '''DR11-C general device interface''' was a [[UNIBUS]] [[device controller]] which provided a pair of 16-[[bit]] parallel ports, one input, and one output. It was a [[DEC card form factor\|quad]] format card (M7860), and used an [[Small Peripheral Controller\|SPC]] slot; it used [[programmed I/O]].		The '''DR11-C general device interface''' was a [[UNIBUS]] [[device controller]] which provided a pair of 16-[[bit]] [[parallel interface\|parallel ports]], one input, and one output. It was a [[DEC card form factor\|quad]] format card (M7860), and used an [[Small Peripheral Controller\|SPC]] slot; it used [[programmed I/O]].

	Connection to the [[user]]'s device is via a pair of 40-[[pin]] [[Berg connector]]s. A pair of optional single-width paddle cards (M971) may be connected via [[flat cable]]s. Data going out to the user's device was latched in the DR11-C, so may be read at leisure; data coming in from the user's device was merely sampled by the DR11-c, so must be held until it has been read.		Connection to the [[user]]'s device is via a pair of 40-[[pin]] [[Berg connector]]s. A pair of optional single-width paddle cards (M971) may be connected via [[flat cable]]s. Data going out to the user's device was latched in the DR11-C, so may be read at leisure; data coming in from the user's device was merely sampled by the DR11-c, so must be held until it has been read.
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	\| colspan=16 \| ''IN15 <-> IN0''		\| colspan=16 \| ''IN15 <-> IN0''
	{{16bit-bitout}}		{{16bit-bitout}}

			==External links==

			* [http://www.bitsavers.org/www.computer.museum.uq.edu.au/pdf/DEC-11-HDRCA-C-D%20DR11-C%20General%20Device%20Interface%20Manual.pdf DR11-C general device interface manual] (DEC-11-HDRCA-C-D)
			* [http://www.bitsavers.org/pdf/dec/unibus/EK-DR11C-TM-004_DR11-C_General_Device_Interface_Manual_Jun74.pdf DR11-C general device interface manual] (EK-DR11C-TM-004)
			* [http://www.bitsavers.org/pdf/dec/unibus/DR11-C_EngrDrws.pdf DR11-C general device interface engineering drawings]

	[[Category: UNIBUS Parallel Interfaces]]		[[Category: UNIBUS Parallel Interfaces]]

Jnc: move to new subcat

2020-06-09T11:47:50Z

move to new subcat

← Older revision		Revision as of 11:47, 9 June 2020
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	{{16bit-bitout}}		{{16bit-bitout}}

	[[Category:UNIBUS ~~Peripherals~~]]		[[Category: UNIBUS Parallel Interfaces]]

Jnc: I/O details

2020-05-13T01:30:37Z

I/O details

← Older revision		Revision as of 01:30, 13 May 2020
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	The '''DR11-C general device interface''' was a [[UNIBUS]] [[device controller]] which provided a pair of 16-[[bit]] parallel ports, one input, and one output. It was a [[DEC card form factor\|quad]] format card (M7860), and used an [[Small Peripheral Controller\|SPC]] slot; it used [[programmed I/O]].		The '''DR11-C general device interface''' was a [[UNIBUS]] [[device controller]] which provided a pair of 16-[[bit]] parallel ports, one input, and one output. It was a [[DEC card form factor\|quad]] format card (M7860), and used an [[Small Peripheral Controller\|SPC]] slot; it used [[programmed I/O]].

	Connection to the [[user]]'s device is via a pair of 40-[[pin]] [[Berg connector]]s. A pair of optional single-width paddle cards (M971) may be connected via [[flat cable]]s.		Connection to the [[user]]'s device is via a pair of 40-[[pin]] [[Berg connector]]s. A pair of optional single-width paddle cards (M971) may be connected via [[flat cable]]s. Data going out to the user's device was latched in the DR11-C, so may be read at leisure; data coming in from the user's device was merely sampled by the DR11-c, so must be held until it has been read.

	The DR11-C is the replacement for the earlier multi-board [[DR11-A General Device Interface]]. The DR11-C is slightly enhanced over the DR11-A (the -A does not have the CSR1/CSR0 bits).		The DR11-C is the replacement for the earlier multi-board [[DR11-A General Device Interface]]. The DR11-C is slightly enhanced over the DR11-A (the -A does not have the CSR1/CSR0 bits).

Jnc: /* Registers */ Define CSR bits

2020-04-16T14:26:11Z

Registers: Define CSR bits

← Older revision		Revision as of 14:26, 16 April 2020
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	\| ''REQ B'' \|\| colspan=7 \| Unused \|\| ''REQ A'' \|\| INT ENB A \|\| INT ENB B \|\| colspan=3 \| Unused \|\| CSR1 \|\| CSR0		\| ''REQ B'' \|\| colspan=7 \| Unused \|\| ''REQ A'' \|\| INT ENB A \|\| INT ENB B \|\| colspan=3 \| Unused \|\| CSR1 \|\| CSR0
	{{16bit-bitout}}		{{16bit-bitout}}

			* REQ B - Request B - Signal from user's hardware which can be tested, or cause an [[interrupt]] (below)
			* REQ A - Request A
			* INT ENB A - Interrupt Enable A - When set, allows setting REQ A to cause an interrupt
			* INT ENB B - Interrupt Enable B
			* CSR1 - Signal to user's hardware (on connector 1)
			* CSR0 - Signal to user's hardware (on connector 2)

	===Output Buffer Register (DROUTBUF)===		===Output Buffer Register (DROUTBUF)===

Jnc: +image

2019-02-26T00:32:47Z

+image

← Older revision		Revision as of 00:32, 26 February 2019
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			[[Image:DR11-C.jpeg\|thumb\|200px\|right\|DR11-C board]]

	The '''DR11-C general device interface''' was a [[UNIBUS]] [[device controller]] which provided a pair of 16-[[bit]] parallel ports, one input, and one output. It was a [[DEC card form factor\|quad]] format card (M7860), and used an [[Small Peripheral Controller\|SPC]] slot; it used [[programmed I/O]].		The '''DR11-C general device interface''' was a [[UNIBUS]] [[device controller]] which provided a pair of 16-[[bit]] parallel ports, one input, and one output. It was a [[DEC card form factor\|quad]] format card (M7860), and used an [[Small Peripheral Controller\|SPC]] slot; it used [[programmed I/O]].

Jnc: Fairly complete

2018-12-20T13:23:51Z

Fairly complete

New page

The '''DR11-C general device interface''' was a [[UNIBUS]] [[device controller]] which provided a pair of 16-[[bit]] parallel ports, one input, and one output. It was a [[DEC card form factor|quad]] format card (M7860), and used an [[Small Peripheral Controller|SPC]] slot; it used [[programmed I/O]].

Connection to the [[user]]'s device is via a pair of 40-[[pin]] [[Berg connector]]s. A pair of optional single-width paddle cards (M971) may be connected via [[flat cable]]s.

The DR11-C is the replacement for the earlier multi-board [[DR11-A General Device Interface]]. The DR11-C is slightly enhanced over the DR11-A (the -A does not have the CSR1/CSR0 bits).

==Registers==

The device has three control and [[buffer]] [[register]]s, which can be configured to any three sequential [[word]] locations in the I/O page; the first DR11-C is normally configured to [[address]]es 767770-767774:

{| border=1
! Register !! Abbreviation !! Address
|-
|Control and Status Register || DRCSR || 767770
|-
|Output Buffer Register || DROUTBUF || 767772
|-
|Input Buffer Register || DRINBUF || 767774
|}

In the register contents (below), bits which are read/write or unused are shown in normal font, those which are read-only are in ''italics''.

===Status Register (DRCSR)===
{{16bit-header}}
| ''REQ B'' || colspan=7 | Unused || ''REQ A'' || INT ENB A || INT ENB B || colspan=3 | Unused || CSR1 || CSR0
{{16bit-bitout}}

===Output Buffer Register (DROUTBUF)===
{{16bit-header}}
| colspan=16 | OUT15 <-> OUT0
{{16bit-bitout}}

===Input Buffer Register (INBUF)===
{{16bit-header}}
| colspan=16 | ''IN15 <-> IN0''
{{16bit-bitout}}

[[Category:UNIBUS Peripherals]]