LSI-11 - Revision history

Jnc: /* External links */ original at Frain Research went offline; add reference to online mirror

2025-05-31T12:37:28Z

External links: original at Frain Research went offline; add reference to online mirror

← Older revision		Revision as of 12:37, 31 May 2025
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	** [http://www.bitsavers.org/pdf/dec/pdp11/1103/1103_Schematics.pdf PDP-11/03 engineering drawings] - includes all KD11 versions		** [http://www.bitsavers.org/pdf/dec/pdp11/1103/1103_Schematics.pdf PDP-11/03 engineering drawings] - includes all KD11 versions
	** [http://www.bitsavers.org/pdf/dec/pdp11/1103/Titelbaum_LSI-11_1975.pdf The LSI-11 - A System Microcomputer]		** [http://www.bitsavers.org/pdf/dec/pdp11/1103/Titelbaum_LSI-11_1975.pdf The LSI-11 - A System Microcomputer]
	* [http://web.frainresearch.org:8080/projects/pdp-11/lsi-11.php LSI-11 Processors]		* [http://web.frainresearch.org:8080/projects/pdp-11/lsi-11.php LSI-11 Processors] (mirrored [https://electrickery.nl/comp/pdp11_23plus/frain.rsx11m.io/lsi-11.php here])

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

	[[Category: PDP-11 QBUS Processors]]		[[Category: PDP-11 QBUS Processors]]

Jnc: First ship date

2023-12-20T20:06:20Z

First ship date

← Older revision		Revision as of 20:06, 20 December 2023
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	[[Image:LSI-11.jpg\|250px\|thumb\|right\|M7264 KD11-F board (etch revision F), with KEV11-A]]		[[Image:LSI-11.jpg\|250px\|thumb\|right\|M7264 KD11-F board (etch revision F), with KEV11-A]]

	The '''LSI-11''' was DEC's first cost-reduced [[PDP-11]] [[Central Processing Unit\|CPU]], introducing the [[QBUS]], and using the [[LSI-11 chip set]]. It was the first of the [[LSI-11 CPUs]]; it had the same QBUS limitations, and use of [[QBUS CPU ODT\|ODT]] for control, as the others.		The '''LSI-11''', first shipped in the Fall of 1975, was DEC's first cost-reduced [[PDP-11]] [[Central Processing Unit\|CPU]], introducing the [[QBUS]], and using the [[LSI-11 chip set]]. It was the first of the [[LSI-11 CPUs]]; it had the same QBUS limitations, and use of [[QBUS CPU ODT\|ODT]] for control, as the others.

	The LSI-11 is a [[DEC card form factor\|quad]] board (M7264) with additional functionality on-board. They were popular in [[Original Equipment Manufacturer\|OEM]] usage.		The LSI-11 is a [[DEC card form factor\|quad]] board (M7264) with additional functionality on-board. They were popular in [[Original Equipment Manufacturer\|OEM]] usage.

Jnc: /* External links */ +Manuals, Eng Drwngs

2023-02-12T14:07:40Z

External links: +Manuals, Eng Drwngs

← Older revision		Revision as of 14:07, 12 February 2023
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	==External links==		==External links==

			* [http://www.bitsavers.org/pdf/dec/pdp11/1103/ -11/03] - documentation at [[Bitsavers]]
			** [http://www.bitsavers.org/pdf/dec/pdp11/1103/EK-LSI11-TM-002.pdf LSI-11, PDP-11/03 user's manual] (EK-LSI11-TM-002)
			** [http://www.bitsavers.org/pdf/dec/pdp11/1103/1103_Schematics.pdf PDP-11/03 engineering drawings] - includes all KD11 versions
			** [http://www.bitsavers.org/pdf/dec/pdp11/1103/Titelbaum_LSI-11_1975.pdf The LSI-11 - A System Microcomputer]
	* [http://web.frainresearch.org:8080/projects/pdp-11/lsi-11.php LSI-11 Processors]		* [http://web.frainresearch.org:8080/projects/pdp-11/lsi-11.php LSI-11 Processors]

Jnc: /* External links */ Narrow category

2022-10-11T17:34:52Z

External links: Narrow category

← Older revision		Revision as of 17:34, 11 October 2022
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	{{PDP-11}}		{{PDP-11}}

	[[Category: PDP-11 ~~Processors]]~~		[[Category: PDP-11 QBUS Processors]]
	~~[[Category:~~ QBUS Processors]]

Jnc: +KUV11

2020-03-05T00:51:35Z

+KUV11

← Older revision		Revision as of 00:51, 5 March 2020
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	The LSI-11 is a [[DEC card form factor\|quad]] board (M7264) with additional functionality on-board. They were popular in [[Original Equipment Manufacturer\|OEM]] usage.		The LSI-11 is a [[DEC card form factor\|quad]] board (M7264) with additional functionality on-board. They were popular in [[Original Equipment Manufacturer\|OEM]] usage.

	The usual CPU options were available for the LSI-11: the [[KEV11-A floating point\|KEV11-A]], for the [[PDP-11 Extended Instruction Set\|EIS]]/[[FIS floating point\|FIS]] instructions; the [[KEV11-B Extended Instruction Set\|KEV11-B]] provides EIS without FIS; the [[KEV11-C Commercial Instruction Set\|KEV11-C]] provides a subset of the PDP-11 [[PDP-11 Commercial Instruction Set\|CIS]] (it also apparently includes the EIS, but not the FIS).		The usual CPU options were available for the LSI-11: the [[KEV11-A floating point\|KEV11-A]], for the [[PDP-11 Extended Instruction Set\|EIS]]/[[FIS floating point\|FIS]] instructions; the [[KEV11-B Extended Instruction Set\|KEV11-B]] provides EIS without FIS; the [[KEV11-C Commercial Instruction Set\|KEV11-C]] provides a subset of the PDP-11 [[PDP-11 Commercial Instruction Set\|CIS]] (it also apparently includes the EIS, but not the FIS). It also supported the optional [[KUV11 Writeable Control Store]].

	The [[integrated circuit\|chip]] order (from the left, with the contact finger edge down, and the component side facing the viewer) is [[KEV11]], ~~uROM~~ 1, ~~uROM~~ 0, Control, Data Path.		The [[integrated circuit\|chip]] order (from the left, with the contact finger edge down, and the component side facing the viewer) is [[KEV11]], μROM 1, μROM 0, Control, Data Path.

	==Variant models==		==Variant models==

Jnc: Add image

2020-03-04T15:33:44Z

Add image

← Older revision		Revision as of 15:33, 4 March 2020
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	The '''LSI-11''' was DEC's first cost-reduced [[PDP-11]] [[Central Processing Unit\|CPU]], ~~using~~ the [[QBUS]] and the [[LSI-11 chip set]]. It was the first of the [[LSI-11 CPUs]]; it had the [[QBUS]] limitations, and use of [[QBUS CPU ODT\|ODT]] for control, as the others.		[[Image:LSI-11.jpg\|250px\|thumb\|right\|M7264 KD11-F board (etch revision F), with KEV11-A]]

			The '''LSI-11''' was DEC's first cost-reduced [[PDP-11]] [[Central Processing Unit\|CPU]], introducing the [[QBUS]], and using the [[LSI-11 chip set]]. It was the first of the [[LSI-11 CPUs]]; it had the same QBUS limitations, and use of [[QBUS CPU ODT\|ODT]] for control, as the others.

	The LSI-11 is a [[DEC card form factor\|quad]] board (M7264) with additional functionality on-board. They were popular in [[Original Equipment Manufacturer\|OEM]] usage.		The LSI-11 is a [[DEC card form factor\|quad]] board (M7264) with additional functionality on-board. They were popular in [[Original Equipment Manufacturer\|OEM]] usage.

Jnc: /* Links */ +see also

2020-03-04T03:34:07Z

Links: +see also

← Older revision		Revision as of 03:34, 4 March 2020
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	* the KD11-R is a KD11-H sold with an [[MSV11-C QBUS MOS memory]] card		* the KD11-R is a KD11-H sold with an [[MSV11-C QBUS MOS memory]] card

	==~~Links~~==		==See also==

			* [[LSI-11/2]]

			==External links==

	* [http://web.frainresearch.org:8080/projects/pdp-11/lsi-11.php LSI-11 Processors]		* [http://web.frainresearch.org:8080/projects/pdp-11/lsi-11.php LSI-11 Processors]

Jnc: typo

2019-08-25T14:26:05Z

typo

← Older revision		Revision as of 14:26, 25 August 2019
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	The '''LSI-11''' was DEC's first cost-reduced [[PDP-11]] [[Central Processing Unit\|CPU]], using the [[QBUS]] and the [[LSI-11 chip set]]. It was the first of the [[LSI-11 CPUs]]; it had the ~~same~~ [[QBUS]] limitations, and ~~used~~ of [[QBUS CPU ODT\|ODT]] for control.		The '''LSI-11''' was DEC's first cost-reduced [[PDP-11]] [[Central Processing Unit\|CPU]], using the [[QBUS]] and the [[LSI-11 chip set]]. It was the first of the [[LSI-11 CPUs]]; it had the [[QBUS]] limitations, and use of [[QBUS CPU ODT\|ODT]] for control, as the others.

	The LSI-11 is a [[DEC card form factor\|quad]] board (M7264) with additional functionality on-board. They were popular in [[Original Equipment Manufacturer\|OEM]] usage.		The LSI-11 is a [[DEC card form factor\|quad]] board (M7264) with additional functionality on-board. They were popular in [[Original Equipment Manufacturer\|OEM]] usage.

Jnc: Mention same QBUS limits, ODT

2019-08-19T18:06:11Z

Mention same QBUS limits, ODT

← Older revision		Revision as of 18:06, 19 August 2019
Line 1:		Line 1:
	The '''LSI-11''' was DEC's first cost-reduced [[PDP-11]] [[Central Processing Unit\|CPU]], using the [[QBUS]] and the [[LSI-11 chip set]]. It was the first of the [[LSI-11 CPUs]], ~~using that chip set~~.		The '''LSI-11''' was DEC's first cost-reduced [[PDP-11]] [[Central Processing Unit\|CPU]], using the [[QBUS]] and the [[LSI-11 chip set]]. It was the first of the [[LSI-11 CPUs]]; it had the same [[QBUS]] limitations, and used of [[QBUS CPU ODT\|ODT]] for control.

	The LSI-11 is a [[DEC card form factor\|quad]] board (M7264) with additional functionality on-board. They were popular in [[Original Equipment Manufacturer\|OEM]] usage.		The LSI-11 is a [[DEC card form factor\|quad]] board (M7264) with additional functionality on-board. They were popular in [[Original Equipment Manufacturer\|OEM]] usage.

Jnc: Move QBUS info to page for group

2019-08-19T16:27:32Z

Move QBUS info to page for group

← Older revision		Revision as of 16:27, 19 August 2019
Line 1:		Line 1:
	The '''LSI-11''' was DEC's first cost-reduced [[PDP-11]] [[Central Processing Unit\|CPU]], using the [[QBUS]] and the [[LSI-11 chip set]]. ~~They were popular in~~ [[~~Original Equipment Manufacturer\|OEM~~]] ~~usage~~.		The '''LSI-11''' was DEC's first cost-reduced [[PDP-11]] [[Central Processing Unit\|CPU]], using the [[QBUS]] and the [[LSI-11 chip set]]. It was the first of the [[LSI-11 CPUs]], using that chip set.

	The LSI-11 is a [[DEC card form factor\|quad]] board (M7264) with additional functionality on-board. ~~(A later board, the~~ [[~~LSI-11/2]], packaged just the CPU on a dual card.)~~		The LSI-11 is a [[DEC card form factor\|quad]] board (M7264) with additional functionality on-board. They were popular in [[Original Equipment Manufacturer\|OEM]] usage.

	~~The LSI-11 is a [[QBUS#Variable address size~~\|~~Q16]] device; it only drives 16 address lines. Although it can be plugged into a Q18 or Q22 [[backplane]], it will '''only''' function with Q16 [[main memory~~]]. ~~(With Q22 memory, the pins used for BDAL18-21 are used for other, internal signals by the LSI-11. The reason for the incompatability with Q18 memory is currently unknown.)~~

	The usual CPU options were available for the LSI-11: the [[KEV11-A floating point\|KEV11-A]], for the [[PDP-11 Extended Instruction Set\|EIS]]/[[FIS floating point\|FIS]] instructions; the [[KEV11-B Extended Instruction Set\|KEV11-B]] provides EIS without FIS; the [[KEV11-C Commercial Instruction Set\|KEV11-C]] provides a subset of the PDP-11 [[PDP-11 Commercial Instruction Set\|CIS]] (it also apparently includes the EIS, but not the FIS).		The usual CPU options were available for the LSI-11: the [[KEV11-A floating point\|KEV11-A]], for the [[PDP-11 Extended Instruction Set\|EIS]]/[[FIS floating point\|FIS]] instructions; the [[KEV11-B Extended Instruction Set\|KEV11-B]] provides EIS without FIS; the [[KEV11-C Commercial Instruction Set\|KEV11-C]] provides a subset of the PDP-11 [[PDP-11 Commercial Instruction Set\|CIS]] (it also apparently includes the EIS, but not the FIS).

	~~It also supported the optional [[KUV11 Writeable Control Store]].~~

	The [[integrated circuit\|chip]] order (from the left, with the contact finger edge down, and the component side facing the viewer) is [[KEV11]], uROM 1, uROM 0, Control, Data Path.		The [[integrated circuit\|chip]] order (from the left, with the contact finger edge down, and the component side facing the viewer) is [[KEV11]], uROM 1, uROM 0, Control, Data Path.

← Older revision		Revision as of 20:06, 20 December 2023
Line 1:		Line 1:
	[[Image:LSI-11.jpg\|250px\|thumb\|right\|M7264 KD11-F board (etch revision F), with KEV11-A]]		[[Image:LSI-11.jpg\|250px\|thumb\|right\|M7264 KD11-F board (etch revision F), with KEV11-A]]

	The '''LSI-11''' was DEC's first cost-reduced [[PDP-11]] [[Central Processing Unit\|CPU]], introducing the [[QBUS]], and using the [[LSI-11 chip set]]. It was the first of the [[LSI-11 CPUs]]; it had the same QBUS limitations, and use of [[QBUS CPU ODT\|ODT]] for control, as the others.		The '''LSI-11''', first shipped in the Fall of 1975, was DEC's first cost-reduced [[PDP-11]] [[Central Processing Unit\|CPU]], introducing the [[QBUS]], and using the [[LSI-11 chip set]]. It was the first of the [[LSI-11 CPUs]]; it had the same QBUS limitations, and use of [[QBUS CPU ODT\|ODT]] for control, as the others.

	The LSI-11 is a [[DEC card form factor\|quad]] board (M7264) with additional functionality on-board. They were popular in [[Original Equipment Manufacturer\|OEM]] usage.		The LSI-11 is a [[DEC card form factor\|quad]] board (M7264) with additional functionality on-board. They were popular in [[Original Equipment Manufacturer\|OEM]] usage.

← Older revision		Revision as of 15:33, 4 March 2020
Line 1:		Line 1:
	The '''LSI-11''' was DEC's first cost-reduced [[PDP-11]] [[Central Processing Unit\|CPU]], ~~using~~ the [[QBUS]] and the [[LSI-11 chip set]]. It was the first of the [[LSI-11 CPUs]]; it had the [[QBUS]] limitations, and use of [[QBUS CPU ODT\|ODT]] for control, as the others.		[[Image:LSI-11.jpg\|250px\|thumb\|right\|M7264 KD11-F board (etch revision F), with KEV11-A]]

			The '''LSI-11''' was DEC's first cost-reduced [[PDP-11]] [[Central Processing Unit\|CPU]], introducing the [[QBUS]], and using the [[LSI-11 chip set]]. It was the first of the [[LSI-11 CPUs]]; it had the same QBUS limitations, and use of [[QBUS CPU ODT\|ODT]] for control, as the others.

	The LSI-11 is a [[DEC card form factor\|quad]] board (M7264) with additional functionality on-board. They were popular in [[Original Equipment Manufacturer\|OEM]] usage.		The LSI-11 is a [[DEC card form factor\|quad]] board (M7264) with additional functionality on-board. They were popular in [[Original Equipment Manufacturer\|OEM]] usage.

← Older revision		Revision as of 16:27, 19 August 2019
Line 1:		Line 1:
	The '''LSI-11''' was DEC's first cost-reduced [[PDP-11]] [[Central Processing Unit\|CPU]], using the [[QBUS]] and the [[LSI-11 chip set]]. ~~They were popular in~~ [[~~Original Equipment Manufacturer\|OEM~~]] ~~usage~~.		The '''LSI-11''' was DEC's first cost-reduced [[PDP-11]] [[Central Processing Unit\|CPU]], using the [[QBUS]] and the [[LSI-11 chip set]]. It was the first of the [[LSI-11 CPUs]], using that chip set.

	The LSI-11 is a [[DEC card form factor\|quad]] board (M7264) with additional functionality on-board. ~~(A later board, the~~ [[~~LSI-11/2]], packaged just the CPU on a dual card.)~~		The LSI-11 is a [[DEC card form factor\|quad]] board (M7264) with additional functionality on-board. They were popular in [[Original Equipment Manufacturer\|OEM]] usage.

	~~The LSI-11 is a [[QBUS#Variable address size~~\|~~Q16]] device; it only drives 16 address lines. Although it can be plugged into a Q18 or Q22 [[backplane]], it will '''only''' function with Q16 [[main memory~~]]. ~~(With Q22 memory, the pins used for BDAL18-21 are used for other, internal signals by the LSI-11. The reason for the incompatability with Q18 memory is currently unknown.)~~

	The usual CPU options were available for the LSI-11: the [[KEV11-A floating point\|KEV11-A]], for the [[PDP-11 Extended Instruction Set\|EIS]]/[[FIS floating point\|FIS]] instructions; the [[KEV11-B Extended Instruction Set\|KEV11-B]] provides EIS without FIS; the [[KEV11-C Commercial Instruction Set\|KEV11-C]] provides a subset of the PDP-11 [[PDP-11 Commercial Instruction Set\|CIS]] (it also apparently includes the EIS, but not the FIS).		The usual CPU options were available for the LSI-11: the [[KEV11-A floating point\|KEV11-A]], for the [[PDP-11 Extended Instruction Set\|EIS]]/[[FIS floating point\|FIS]] instructions; the [[KEV11-B Extended Instruction Set\|KEV11-B]] provides EIS without FIS; the [[KEV11-C Commercial Instruction Set\|KEV11-C]] provides a subset of the PDP-11 [[PDP-11 Commercial Instruction Set\|CIS]] (it also apparently includes the EIS, but not the FIS).

	~~It also supported the optional [[KUV11 Writeable Control Store]].~~

	The [[integrated circuit\|chip]] order (from the left, with the contact finger edge down, and the component side facing the viewer) is [[KEV11]], uROM 1, uROM 0, Control, Data Path.		The [[integrated circuit\|chip]] order (from the left, with the contact finger edge down, and the component side facing the viewer) is [[KEV11]], uROM 1, uROM 0, Control, Data Path.