Extended UNIBUS - Revision history

Jnc: +New category

2024-02-06T14:00:32Z

+New category

Jnc: rm bloat

2023-07-02T16:08:20Z

rm bloat

Jnc: missing AT2

2022-01-16T15:10:16Z

missing AT2

Jnc: avoid redirs

2022-01-16T12:07:50Z

avoid redirs

Jnc: new cat

2018-11-17T21:00:44Z

new cat

Jnc: +See also

2018-10-16T16:07:26Z

+See also

Jnc: Update cat

2018-02-19T22:20:52Z

Update cat

Jnc: Content moved

2017-12-17T01:09:00Z

Content moved

Jnc: better linkage

2016-07-23T13:42:41Z

better linkage

Jnc: +cat

2016-07-22T17:12:26Z

+cat

← Older revision		Revision as of 14:00, 6 February 2024
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	[[Category: UNIBUS]]		[[Category: UNIBUS]]
		+	[[Category: Extended UNIBUS]]

← Older revision		Revision as of 16:08, 2 July 2023
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	* [[Extended UNIBUS memories]]		* [[Extended UNIBUS memories]]
−
−	~~{{Nav PDP-11}}~~

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

@@ Line 29: / Line 29: @@
 * AR2 - Reserved
 * AS2 - Reserved
 * AU1 - Reserved
 * AU2 - Reserved

@@ Line 1: / Line 1: @@
-The '''Extended UNIBUS''' or '''EUB''' was [[DEC]]'s name for both an upgrade to their standard [[UNIBUS]] [[PDP-11]] bus, to add additional address lines, in order to support larger memories; and also for the slots in a [[backplane]] which instantiated the bus. The added address lines are A18-A21.
+The '''Extended UNIBUS''' or '''EUB''' was [[Digital Equipment Corporation|DEC]]'s name for both an upgrade to their standard [[UNIBUS]] [[PDP-11]] bus, to add additional address lines, in order to support larger memories; and also for the slots in a [[backplane]] which instantiated the bus. The added address lines are A18-A21.
 The slots were [[DEC card form factor|hex]] slot, and could hold only special EUB [[main memory]] cards, the only EUB cards ever produced. The only machines to support the EUB were the [[PDP-11/44]] and [[PDP-11/24]], which had a limited number of EUB slots in their main backplanes (the ones which held their [[Central Processing Unit|CPUs]]).
@@ Line 9: / Line 9: @@
 ==EUB memory boards==
-The only EUB-capable memories which DEC produced were the [[MS11-L]], [[MS11-M]], and [[MS11-P]]. The first two were jumperable for use on either the UNIBUS or EUB, although the second used the unusual power [[voltage]]s of +12V/-12V, which most backplanes did not supply.
+The only EUB-capable memories which DEC produced were the [[MS11-L MOS memory|MS11-L]], [[MS11-M MOS memory|MS11-M]], and [[MS11-P MOS memory|MS11-P]]. The first two were [[jumper]]able for use on either the UNIBUS or EUB, although the second used the unusual power [[voltage]]s of +12V/-12V, which most backplanes did not supply.
 Other manufacturers also produced EUB memories.
@@ Line 72: / Line 72: @@
 * [[Extended UNIBUS memories]]
-{{PDP-11}}
+{{Nav PDP-11}}
 [[Category: UNIBUS]]

← Older revision		Revision as of 21:00, 17 November 2018
Line 74:		Line 74:
	{{PDP-11}}		{{PDP-11}}

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

@@ Line 1: / Line 1: @@
 The '''Extended UNIBUS''' or '''EUB''' was [[DEC]]'s name for both an upgrade to their standard [[UNIBUS]] [[PDP-11]] bus, to add additional address lines, in order to support larger memories; and also for the slots in a [[backplane]] which instantiated the bus. The added address lines are A18-A21.
-The slots were [[DEC card form factor|hex]] slot, and could hold only special EUB memory cards, the only EUB cards ever produced. The only machines to support the EUB were the [[PDP-11/44]] and [[PDP-11/24]], which had a limited number of EUB slots in their main backplanes (the ones which held their CPUs).
+The slots were [[DEC card form factor|hex]] slot, and could hold only special EUB [[main memory]] cards, the only EUB cards ever produced. The only machines to support the EUB were the [[PDP-11/44]] and [[PDP-11/24]], which had a limited number of EUB slots in their main backplanes (the ones which held their [[Central Processing Unit|CPUs]]).
-EUB slots differed from the older [[Modified UNIBUS Device|MUD]] slots in that they re-purposed some of the pins in the [[DEC edge connector contact identification|A-B connectors]] to carry EUB signals (A18-A21, principally), thus making it not pin-compatible with the usual dual UNIBUS slot).
+EUB slots differed from the older [[Modified UNIBUS Device|MUD]] slots in that they re-purposed some of the pins in the [[DEC edge connector contact identification|A-B connectors]] to carry EUB signals (A18-A21, principally), thus making it not pin-compatible with the usual dual UNIBUS slot (which usually appears on the A-B connectors in such slots).
 In the -11/24, at least, the EUB slots can also support a normal [[Small Peripheral Controller|SPC]] device, in the C-F connectors usually used for SPC devices in hex slots. However, the two busses in such slots are '''not''' fully connected, as they are in MUD/SPC backplanes; instead, they form two somewhat separate busses. (See the [[PDP-11/24]] article for the details.)
@@ Line 9: / Line 9: @@
 ==EUB memory boards==
-The only EUB-capable memories which DEC produced were the [[MS11-L]], [[MS11-M]], and [[MS11-P]]. The first two were jumperable for use on either the UNIBUS or EUB, although the second used the unusual power voltage of +12V, which most backplanes did not supply.
+The only EUB-capable memories which DEC produced were the [[MS11-L]], [[MS11-M]], and [[MS11-P]]. The first two were jumperable for use on either the UNIBUS or EUB, although the second used the unusual power [[voltage]]s of +12V/-12V, which most backplanes did not supply.
 Other manufacturers also produced EUB memories.
@@ Line 42: / Line 42: @@
 ==Removed signals==
-To provide the extra pins needed, since grants has already been removed, other interrupt-related signals (including requestts) were removed. In addition, power pins for voltages which were no longer common (due to the replacement of core memory by semi-conductor memory) were also removed.
+To provide the extra pins needed, since grants has already been removed, other interrupt-related signals (including requests) were removed. In addition, power pins for voltages which were no longer common (due to the replacement of core memory by semi-conductor memory) were also removed.
 ===Pins===
@@ Line 67: / Line 67: @@
 * BE2 - Parity Detect
 * BV2 - -5V (core)
 {{PDP-11}}
 [[Category: DEC Buses]]

← Older revision		Revision as of 22:20, 19 February 2018
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	{{PDP-11}}		{{PDP-11}}

−	[[Category:~~Bus Architectures~~]]	+	[[Category: DEC Buses]]

@@ Line 3: / Line 3: @@
 The slots were [[DEC card form factor|hex]] slot, and could hold only special EUB memory cards, the only EUB cards ever produced. The only machines to support the EUB were the [[PDP-11/44]] and [[PDP-11/24]], which had a limited number of EUB slots in their main backplanes (the ones which held their CPUs).
-EUB slots differed from the older [[Modified UNIBUS Device|MUD]] slots in that they re-purposed some of the pins in the A/B rows to carry EUB signals (A18-A21, principally), thus making it not pin-compatible with the usual dual UNIBUS slot).
+EUB slots differed from the older [[Modified UNIBUS Device|MUD]] slots in that they re-purposed some of the pins in the [[DEC card form factor#Edge connector contact identification|A-B connectors]] to carry EUB signals (A18-A21, principally), thus making it not pin-compatible with the usual dual UNIBUS slot).
-In the -11/24, at least, the EUB slots can also support a normal [[Small Peripheral Controller|SPC]] device, in the [[DEC card form factor#Edge connector contact identification|C-F connectors]] usually used for SPC devices in hex slots. However, the two busses in such slots are '''not''' fully connected, as they are in MUD/SPC backplanes; instead, they form two somewhat separate busses. (See the [[PDP-11/24]] article for the details.)
+In the -11/24, at least, the EUB slots can also support a normal [[Small Peripheral Controller|SPC]] device, in the C-F connectors usually used for SPC devices in hex slots. However, the two busses in such slots are '''not''' fully connected, as they are in MUD/SPC backplanes; instead, they form two somewhat separate busses. (See the [[PDP-11/24]] article for the details.)
 ==EUB memory boards==

← Older revision		Revision as of 17:12, 22 July 2016
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	{{PDP-11}}		{{PDP-11}}
		+
		+	[[Category:Bus Architectures]]