Modified UNIBUS Device - Revision history

Jnc: Move Engineering Drawings for individual backplanes to individual pages

2023-03-30T14:06:53Z

Move Engineering Drawings for individual backplanes to individual pages

← Older revision		Revision as of 14:06, 30 March 2023
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	==See also==		==See also==

			* [[DD11-P backplane]]
	* [[Extended UNIBUS]]		* [[Extended UNIBUS]]
	* [[:Category:UNIBUS_Backplanes\|UNIBUS Backplanes]]		* [[:Category:UNIBUS_Backplanes\|UNIBUS Backplanes]]
	* [[G727_grant_continuity_card\|G727 Grant Continuity Card]]		* [[G727_grant_continuity_card\|G727 Grant Continuity Card]]
	* [[G7273_grant_continuity_card\|G7273 Grant Continuity Card]]		* [[G7273_grant_continuity_card\|G7273 Grant Continuity Card]]

	~~==External links==~~

	* [http://www.bitsavers.org/pdf/dec/unibus/DD11-B_RevE_Engineering_Drawings_Feb74.pdf DD11-B Engineering Drawings ]
	* [http://www.bitsavers.org/pdf/dec/unibus/DD11-C_RevB_Engineering_Drawings_May77.pdf DD11-C Engineering Drawings ] - DD11-CK and DD11-CF wiring harness requirements can be found on pages 5 & 7
	* [http://www.bitsavers.org/pdf/dec/unibus/DD11-D_RevC_Engineering_Drawings_Feb77.pdf DD11-D Engineering Drawings ] - DD11-DK and DD11-DF wiring harness requirements can be found on pages 6 & 7
	* [http://www.bitsavers.org/pdf/dec/unibus/DD11-P_RevD_Engineering_Drawings_Feb77.pdf DD11-P Engineering Drawings ]

	~~{{PDP-11}}~~

	[[Category: UNIBUS]]		[[Category: UNIBUS]]

Ashlin4010: /* External links */

2023-03-27T08:46:56Z

External links

← Older revision		Revision as of 08:46, 27 March 2023
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	==External links==		==External links==

	* [http://www.bitsavers.org/pdf/dec/unibus/DB11-A_RevS_Engineering_Drawings_Jan76.pdf DD11-A Engineering Drawings ]
	* [http://www.bitsavers.org/pdf/dec/unibus/DD11-B_RevE_Engineering_Drawings_Feb74.pdf DD11-B Engineering Drawings ]		* [http://www.bitsavers.org/pdf/dec/unibus/DD11-B_RevE_Engineering_Drawings_Feb74.pdf DD11-B Engineering Drawings ]
	* [http://www.bitsavers.org/pdf/dec/unibus/DD11-C_RevB_Engineering_Drawings_May77.pdf DD11-C Engineering Drawings ] - DD11-CK and DD11-CF wiring harness requirements can be found on pages 5 & 7		* [http://www.bitsavers.org/pdf/dec/unibus/DD11-C_RevB_Engineering_Drawings_May77.pdf DD11-C Engineering Drawings ] - DD11-CK and DD11-CF wiring harness requirements can be found on pages 5 & 7
	* [http://www.bitsavers.org/pdf/dec/unibus/DD11-D_RevC_Engineering_Drawings_Feb77.pdf DD11-D Engineering Drawings ] - DD11-DK and DD11-DF wiring harness requirements can be found on pages 6 & 7		* [http://www.bitsavers.org/pdf/dec/unibus/DD11-D_RevC_Engineering_Drawings_Feb77.pdf DD11-D Engineering Drawings ] - DD11-DK and DD11-DF wiring harness requirements can be found on pages 6 & 7
	* [http://www.bitsavers.org/pdf/dec/unibus/DD11-P_RevD_Engineering_Drawings_Feb77.pdf DD11-P Engineering Drawings ]		* [http://www.bitsavers.org/pdf/dec/unibus/DD11-P_RevD_Engineering_Drawings_Feb77.pdf DD11-P Engineering Drawings ]


	{{PDP-11}}		{{PDP-11}}

	[[Category: UNIBUS]]		[[Category: UNIBUS]]

Ashlin4010: /* See also */

2023-03-27T08:42:28Z

Ashlin4010: /* See also */

2023-03-27T08:39:03Z

Ashlin4010 at 08:25, 27 March 2023

2023-03-27T08:25:46Z

← Older revision		Revision as of 08:25, 27 March 2023
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	* [[Extended UNIBUS]]		* [[Extended UNIBUS]]



			==External links==

			* [http://www.bitsavers.org/pdf/dec/unibus/DB11-A_RevS_Engineering_Drawings_Jan76.pdf DD11-A Engineering Drawings ]
			* [http://www.bitsavers.org/pdf/dec/unibus/DD11-B_RevE_Engineering_Drawings_Feb74.pdf DD11-B Engineering Drawings ]
			* [http://www.bitsavers.org/pdf/dec/unibus/DD11-C_RevB_Engineering_Drawings_May77.pdf DD11-C Engineering Drawings ] - DD11-CK and DD11-CF wiring harness requirements can be found on pages 5 & 7
			* [http://www.bitsavers.org/pdf/dec/unibus/DD11-D_RevC_Engineering_Drawings_Feb77.pdf DD11-D Engineering Drawings ] - DD11-DK and DD11-DF wiring harness requirements can be found on pages 6 & 7
			* [http://www.bitsavers.org/pdf/dec/unibus/DD11-P_RevD_Engineering_Drawings_Feb77.pdf DD11-P Engineering Drawings ]


	{{PDP-11}}		{{PDP-11}}

	[[Category: UNIBUS]]		[[Category: UNIBUS]]

Jnc: +See also

2022-01-10T12:27:38Z

+See also

← Older revision		Revision as of 12:27, 10 January 2022
Line 70:		Line 70:
	* BE2 - BG4		* BE2 - BG4
	* BV2 - Ground		* BV2 - Ground

			==See also==

			* [[Extended UNIBUS]]

	{{PDP-11}}		{{PDP-11}}

	[[Category: UNIBUS]]		[[Category: UNIBUS]]

Jnc: update names for backplane pages

2019-01-18T22:25:51Z

update names for backplane pages

← Older revision		Revision as of 22:25, 18 January 2019
Line 9:		Line 9:
	Technically, a MUD slot only describes the A-B [[DEC edge connector contact identification\|connectors]]; most backplanes also provided SPC functionality in the C-F connectors (needed for signals for [[interrupt]]s or [[Direct Memory Access\|DMA]], for devices which did those), with most UNIBUS signals present in both; the combination is sometimes called a 'MUD/SPC' slot.		Technically, a MUD slot only describes the A-B [[DEC edge connector contact identification\|connectors]]; most backplanes also provided SPC functionality in the C-F connectors (needed for signals for [[interrupt]]s or [[Direct Memory Access\|DMA]], for devices which did those), with most UNIBUS signals present in both; the combination is sometimes called a 'MUD/SPC' slot.

	The [[DD11-C]] (4-slot) and [[DD11-D]] (9-slot) and later backplanes generally provided MUD slots, not the earlier SPC slots; however, generally the slots in these later backplanes are MUD/SPC - other than the entrance and exit slots, which have normal two-slot UNIBUS in/out in A-B, and SPC in C-F.		The [[DD11-C backplane\|DD11-C]] (4-slot) and [[DD11-D backplane\|DD11-D]] (9-slot) and later backplanes generally provided MUD slots, not the earlier SPC slots; however, generally the slots in these later backplanes are MUD/SPC - other than the entrance and exit slots, which have normal two-slot UNIBUS in/out in A-B, and SPC in C-F.

	==Grants==		==Grants==

Jnc: new cat

2018-11-17T21:01:34Z

new cat

← Older revision		Revision as of 21:01, 17 November 2018
Line 73:		Line 73:
	{{PDP-11}}		{{PDP-11}}

	[[Category: ~~DEC Buses~~]]		[[Category: UNIBUS]]

Jnc: Add links, clarify some points

2018-10-17T20:32:03Z

Add links, clarify some points

← Older revision		Revision as of 20:32, 17 October 2018
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	It differed from the older [[Small Peripheral Controller\|SPC]] slot in that it was a hex-height slot, and used the pins (in the [[DEC edge connector contact identification\|A-B connectors]]) to carry UNIBUS signals - mostly pin-compatible with the original dual UNIBUS slot, but there were a few important differences.		It differed from the older [[Small Peripheral Controller\|SPC]] slot in that it was a hex-height slot, and used the pins (in the [[DEC edge connector contact identification\|A-B connectors]]) to carry UNIBUS signals - mostly pin-compatible with the original dual UNIBUS slot, but there were a few important differences.

	The most important was that since the standard UNIBUS dual connector only contains one pin per grant (suitable only for an 'in' or 'out' UNIBUS connector), not separate 'grant in' and 'grant out' pins (as on the [[QBUS]]), a full-function UNIBUS slot is not possible with only two connectors. The MUD connectors therefore do not contain grants; those pins were recycled for other functions.		The most important was that since the standard UNIBUS dual connector only contains one pin per [[bus grant line]] (suitable only for an 'in' or 'out' UNIBUS connector), not separate 'grant in' and 'grant out' pins (as on the [[QBUS]]), a full-function UNIBUS slot is not possible with only two connectors. The MUD connectors therefore do not contain grants; those pins were recycled for other functions.

	Some re-assigned pins contain a number of lines for communication between a parity controller, and parity-capable memory boards plugged into that backplane; others carry additional ~~voltages~~ (primarily for core memory).		Some re-assigned pins contain a number of lines for communication between a [[parity]] controller, and parity-capable [[main memory]] boards plugged into that backplane; others carry additional [[voltage]]s (primarily for [[core memory]]).

	Technically, a MUD slot only describes the A-B connectors; most backplanes also provided SPC functionality in the C-F ~~conectors~~ (needed for signals for ~~interrupts~~ or DMA, for devices which did those), with most UNIBUS signals present in both; the combination is sometimes called a 'MUD/SPC' slot.		Technically, a MUD slot only describes the A-B [[DEC edge connector contact identification\|connectors]]; most backplanes also provided SPC functionality in the C-F connectors (needed for signals for [[interrupt]]s or [[Direct Memory Access\|DMA]], for devices which did those), with most UNIBUS signals present in both; the combination is sometimes called a 'MUD/SPC' slot.

	The [[DD11-C]] (4-slot) and [[DD11-D]] (9-slot) and later backplanes generally provided MUD slots, not the earlier SPC slots; however, generally the slots in these later backplanes are MUD/SPC - other than the entrance and exit slots, which have normal two-slot UNIBUS in/out in A-B.		The [[DD11-C]] (4-slot) and [[DD11-D]] (9-slot) and later backplanes generally provided MUD slots, not the earlier SPC slots; however, generally the slots in these later backplanes are MUD/SPC - other than the entrance and exit slots, which have normal two-slot UNIBUS in/out in A-B, and SPC in C-F.

	==Grants==		==Grants==
Line 17:		Line 17:
	A board plugged into a MUD/SPC slot generally had a header which routed the grant (and matching request) line for the desired priority level to the on-board interrupt circuity, and passed the other grant lines through.		A board plugged into a MUD/SPC slot generally had a header which routed the grant (and matching request) line for the desired priority level to the on-board interrupt circuity, and passed the other grant lines through.

	The DMA (NPG) grant line generally had a jumper on the backplane, which had to be removed if a DMA device was plugged into the slot. Un-occupied slots needed to have a grant continuity card installed.		The DMA (NPG) grant line generally had a jumper on the backplane, which had to be removed if a DMA device was plugged into the slot.

			Un-occupied slots needed to have a [[G7273 grant continuity card\|grant continuity card]] installed.

	==Added signals==		==Added signals==
Line 23:		Line 25:
	The added lines for communication between a parity controller and parity-capable memory boards were Parity Detect (used to let memory boards know that a parity controller is present); Internal SSYN (used by memory boards to let the parity controller know that their data is ready); and Parity P0 and Parity P1 (parity data).		The added lines for communication between a parity controller and parity-capable memory boards were Parity Detect (used to let memory boards know that a parity controller is present); Internal SSYN (used by memory boards to let the parity controller know that their data is ready); and Parity P0 and Parity P1 (parity data).

	The additional voltages were + and -15V, -5V, and +20V.		The additional voltages were + and -15V, -5V, and +20V. Note that in some machines (the [[PDP-11/44]] and [[PDP-11/24]]) the +15V/-15 pins actually contain +12V/-12V, for use by the [[MS11-M MOS memory]] card, which needs those voltages. +15V/-15V are available in the SPC portion of some such slots.

	===Pinout===		===Pinout===
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	{{PDP-11}}		{{PDP-11}}

			[[Category: DEC Buses]]

Jnc: Content moved

2017-12-17T01:13:38Z

Content moved

← Older revision		Revision as of 01:13, 17 December 2017
Line 1:		Line 1:
	'''Modified UNIBUS Device''' or '''MUD''' was [[DEC]]'s name for an I/O board slot in the [[backplane]]s of [[UNIBUS]] [[PDP-11]]s. It was a [[DEC card form factor\|hex]] slot, and could hold any kind of device.		'''Modified UNIBUS Device''' or '''MUD''' was [[DEC]]'s name for an I/O board slot in the [[backplane]]s of [[UNIBUS]] [[PDP-11]]s. It was a [[DEC card form factor\|hex]] slot, and could hold any kind of device.

	It differed from the older [[Small Peripheral Controller\|SPC]] slot in that it was a hex-height slot, and used the pins (in the [[DEC ~~card form factor#Edge~~ connector contact identification\|A-B connectors]]) to carry UNIBUS signals - mostly pin-compatible with the original dual UNIBUS slot, but there were a few important differences.		It differed from the older [[Small Peripheral Controller\|SPC]] slot in that it was a hex-height slot, and used the pins (in the [[DEC edge connector contact identification\|A-B connectors]]) to carry UNIBUS signals - mostly pin-compatible with the original dual UNIBUS slot, but there were a few important differences.

	The most important was that since the standard UNIBUS dual connector only contains one pin per grant (suitable only for an 'in' or 'out' UNIBUS connector), not separate 'grant in' and 'grant out' pins (as on the [[QBUS]]), a full-function UNIBUS slot is not possible with only two connectors. The MUD connectors therefore do not contain grants; those pins were recycled for other functions.		The most important was that since the standard UNIBUS dual connector only contains one pin per grant (suitable only for an 'in' or 'out' UNIBUS connector), not separate 'grant in' and 'grant out' pins (as on the [[QBUS]]), a full-function UNIBUS slot is not possible with only two connectors. The MUD connectors therefore do not contain grants; those pins were recycled for other functions.

← Older revision		Revision as of 08:42, 27 March 2023
Line 75:		Line 75:
	* [[Extended UNIBUS]]		* [[Extended UNIBUS]]
	* [[:Category:UNIBUS_Backplanes\|UNIBUS Backplanes]]		* [[:Category:UNIBUS_Backplanes\|UNIBUS Backplanes]]
			* [[G727_grant_continuity_card\|G727 Grant Continuity Card]]
			* [[G7273_grant_continuity_card\|G7273 Grant Continuity Card]]

	==External links==		==External links==

← Older revision		Revision as of 08:39, 27 March 2023
Line 74:		Line 74:

	* [[Extended UNIBUS]]		* [[Extended UNIBUS]]
			* [[:Category:UNIBUS_Backplanes\|UNIBUS Backplanes]]


	==External links==		==External links==