List of Programmed Data Processors - Revision history

Larsbrinkhoff: Linkify; expand DEC-20 for clarity; add some more comments.

2024-12-03T07:12:35Z

Linkify; expand DEC-20 for clarity; add some more comments.

← Older revision		Revision as of 07:12, 3 December 2024
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	! Family/Machine !! [[Word]] Size !! Comment		! Family/Machine !! [[Word]] Size !! Comment
	\|-		\|-
	\| [[PDP-1]] \|\| 18		\| [[PDP-1]] \|\| 18 \|\| The first PDP
	\|-		\|-
	\| [[PDP-3]] \|\| 36 \|\| Only one built, not by DEC		\| [[PDP-3]] \|\| 36 \|\| Only one built, not by DEC
	\|-		\|-
	\| [[PDP-4]] \|\| 18		\| [[PDP-4]] \|\| 18 \|\| Simplified and cost-reduced 18-bit machine.
	\|-		\|-
	\| [[PDP-5]] \|\| 12 \|\| ~~First~~ [[minicomputer]]		\| [[PDP-5]] \|\| 12 \|\| The first [[minicomputer]]
	\|-		\|-
	\| [[PDP-6]] \|\| 36		\| [[PDP-6]] \|\| 36 \|\| DEC's first "large" machine; immediate predecessor to the PDP-10 family
	\|-		\|-
	\| [[PDP-7]] \|\| 18 \|\| Original [[UNIX]] machine		\| [[PDP-7]] \|\| 18 \|\| Original [[UNIX]] machine
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	\| [[PDP-9]] \|\| 18		\| [[PDP-9]] \|\| 18
	\|-		\|-
	\| [[PDP-10]] \|\| 36 \|\| DEC's [[mainframe]]. Renamed DECsystem-10, and later added DECSYSTEM-20.		\| [[PDP-10]] \|\| 36 \|\| DEC's [[mainframe]]. Renamed [[DECsystem-10]], and later added [[DECSYSTEM-20]].
	\|-		\|-
	\| [[PDP-11]] \|\| 16		\| [[PDP-11]] \|\| 16
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	\| [[PDP-14]] \|\| 12 \|\| Industrial controller		\| [[PDP-14]] \|\| 12 \|\| Industrial controller
	\|-		\|-
	\| [[PDP-15]] \|\| 18		\| [[PDP-15]] \|\| 18 \|\| The last 18-bit PDP
	\|-		\|-
	\| [[PDP-16]] \|\|   \|\| Not an actual computer; custom industrial controllers built out of [[Register Transfer Module]]s		\| [[PDP-16]] \|\|   \|\| Not an actual computer; custom industrial controllers built out of [[Register Transfer Module]]s
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	\| PDP-13 \|\| — \|\| The unlucky number 13 was skipped.		\| PDP-13 \|\| — \|\| The unlucky number 13 was skipped.
	\|-		\|-
	\| PDP-20 \|\| 36 \|\| ''Not a real name!'' Sometimes used for ~~DEC~~-20 computers.		\| PDP-20 \|\| 36 \|\| ''Not a real name!'' Sometimes used for DECSYSTEM-20 computers.
	\|-		\|-
	\| PDP-24 \|\| 24? \|\| Unconfirmed, mentioned in [http://bitsavers.org/pdf/dec/pdp-x/03.pdf PDP-X memo 3].		\| PDP-24 \|\| 24? \|\| Unconfirmed, mentioned in [http://bitsavers.org/pdf/dec/pdp-x/03.pdf PDP-X memo 3].

Jnc: typo

2023-08-11T13:00:15Z

typo

← Older revision		Revision as of 13:00, 11 August 2023
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	\| [[PDP-9]] \|\| 18		\| [[PDP-9]] \|\| 18
	\|-		\|-
	\| [[PDP-10]] \|\| 36 \|\| DEC's mainframe. Renamed DECsystem-10, and later added DECSYSTEM-20.		\| [[PDP-10]] \|\| 36 \|\| DEC's [[mainframe]]. Renamed DECsystem-10, and later added DECSYSTEM-20.
	\|-		\|-
	\| [[PDP-11]] \|\| 16		\| [[PDP-11]] \|\| 16
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	\| [[PDP-15]] \|\| 18		\| [[PDP-15]] \|\| 18
	\|-		\|-
	\| [[PDP-16]] \|\|   \|\| Not an actual computer; custom industrial controllers built out of [[Register Transfer ~~Modules~~]]		\| [[PDP-16]] \|\|   \|\| Not an actual computer; custom industrial controllers built out of [[Register Transfer Module]]s
	\|}		\|}

	A number of other PDPs never existed as real machines, are ~~minomers~~, or jokes:		A number of other PDPs never existed as real machines, are misnomers, or jokes:

	{\| class="wikitable"		{\| class="wikitable"

Larsbrinkhoff: Clearly separate the first table with PDPs that really existed, from the second which did not.

2023-08-11T09:03:14Z

Clearly separate the first table with PDPs that really existed, from the second which did not.

← Older revision		Revision as of 09:03, 11 August 2023
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	\| [[PDP-9]] \|\| 18		\| [[PDP-9]] \|\| 18
	\|-		\|-
	\| [[PDP-10]] \|\| 36 \|\| DEC's mainframe		\| [[PDP-10]] \|\| 36 \|\| DEC's mainframe. Renamed DECsystem-10, and later added DECSYSTEM-20.
	\|-		\|-
	\| [[PDP-11]] \|\| 16		\| [[PDP-11]] \|\| 16
Line 33:		Line 33:
	\|-		\|-
	\| [[PDP-16]] \|\|   \|\| Not an actual computer; custom industrial controllers built out of [[Register Transfer Modules]]		\| [[PDP-16]] \|\|   \|\| Not an actual computer; custom industrial controllers built out of [[Register Transfer Modules]]
	\|-
	~~\| PDP-20 \|\| 36 \|\| ''Not a real name!'' Sometimes used for DEC-20 computers.~~
	\|}		\|}

	A number of other ~~designs~~ never existed as real machines, ~~only on paper~~:		A number of other PDPs never existed as real machines, are minomers, or jokes:

	{\| class="wikitable"		{\| class="wikitable"
	! Family/Machine !! Word Size !! Comment		! Family/Machine !! Word Size !! Comment
	\|-		\|-
	\| [[PDP-2]] \|\| 24 \|\| Never designed		\| [[PDP-2]] \|\| 24 \|\| Never designed.
	\|-		\|-
	\| PDP-~~2 ½~~ \|\| \|\| Jocular moniker for "[[CASINO]]" by Ed Rawson of the American Science Institute.		\| PDP-2½ \|\| ? \|\| Jocular moniker for "[[CASINO]]" by Ed Rawson of the American Science Institute.
			\|-
			\| PDP-13 \|\| — \|\| The unlucky number 13 was skipped.
			\|-
			\| PDP-20 \|\| 36 \|\| ''Not a real name!'' Sometimes used for DEC-20 computers.
	\|-		\|-
	\| PDP-24 \|\| 24? \|\| Unconfirmed, mentioned in [http://bitsavers.org/pdf/dec/pdp-x/03.pdf PDP-X memo 3].		\| PDP-24 \|\| 24? \|\| Unconfirmed, mentioned in [http://bitsavers.org/pdf/dec/pdp-x/03.pdf PDP-X memo 3].
	\|-		\|-
	\| [[PDP-K]] \|\| 18 \|\| Intended as a bridge between the PDP-15 and the PDP-10 family		\| [[PDP-K]] \|\| 18 \|\| Intended as a bridge between the PDP-15 and the PDP-10 family, with a PDP-11-like instruction set.
	\|-		\|-
	\| [[PDP-X]] \|\| 16 \|\| An alternative to the PDP-11		\| [[PDP-X]] \|\| 16 \|\| An alternative to the PDP-11.
	\|}		\|}

Larsbrinkhoff: Links to PDP-2 and CASINO.

2023-07-29T05:02:21Z

Links to PDP-2 and CASINO.

← Older revision		Revision as of 05:02, 29 July 2023
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	! Family/Machine !! Word Size !! Comment		! Family/Machine !! Word Size !! Comment
	\|-		\|-
	\| PDP-2 \|\| 24 \|\| Never designed		\| [[PDP-2]] \|\| 24 \|\| Never designed
	\|-		\|-
	\| PDP-2 ½ \|\| \|\| "~~Casino~~" by Ed Rawson of the American Science Institute.		\| PDP-2 ½ \|\| \|\| Jocular moniker for "[[CASINO]]" by Ed Rawson of the American Science Institute.
	\|-		\|-
	\| PDP-24 \|\| 24? \|\| Unconfirmed, mentioned in [http://bitsavers.org/pdf/dec/pdp-x/03.pdf PDP-X memo 3].		\| PDP-24 \|\| 24? \|\| Unconfirmed, mentioned in [http://bitsavers.org/pdf/dec/pdp-x/03.pdf PDP-X memo 3].

Jnc: Add table for un-produced machines

2022-05-03T11:22:29Z

Add table for un-produced machines

← Older revision		Revision as of 11:22, 3 May 2022
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	'''Programmed Data Processor''' was the name adopted by [[Digital Equipment Corporation]] for all its early computers. (Reportedly, it was adopted to avoid worrying its early venture capital backers; at the time, almost all computers were large [[mainframe]]s, and DEC's founders were concerned that if it appeared that they intended to compete in that market, they wouldn't be able to get funding.)		'''Programmed Data Processor''' was the name adopted by [[Digital Equipment Corporation]] for all its early computers. (Reportedly, it was adopted to avoid worrying its early venture capital backers; at the time, almost all computers were large [[mainframe]]s, and DEC's founders were concerned that if it appeared that they intended to compete in that market, they wouldn't be able to get funding.)

	The name was dropped starting with the [[VAX]]. The other PDP families (most included more than one model) were:		The name was dropped starting with the [[VAX]]. The other PDP families which became actual products for DEC (most included more than one model) were:

	{\| class="wikitable"		{\| class="wikitable"
Line 7:		Line 7:
	\|-		\|-
	\| [[PDP-1]] \|\| 18		\| [[PDP-1]] \|\| 18
	\|-
	~~\| PDP-2 \|\| 24 \|\| Never designed~~
	\|-
	~~\| PDP-2 ½ \|\| \|\| "Casino" by Ed Rawson of the American Science Institute.~~
	\|-		\|-
	\| [[PDP-3]] \|\| 36 \|\| Only one built, not by DEC		\| [[PDP-3]] \|\| 36 \|\| Only one built, not by DEC
Line 25:		Line 21:
	\|-		\|-
	\| [[PDP-9]] \|\| 18		\| [[PDP-9]] \|\| 18
	\|-
	~~\| PDP-24 \|\| \|\| Unconfirmed, mentioned in [http://bitsavers.org/pdf/dec/pdp-x/03.pdf PDP-X memo 3].~~
	\|-		\|-
	\| [[PDP-10]] \|\| 36 \|\| DEC's mainframe		\| [[PDP-10]] \|\| 36 \|\| DEC's mainframe
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	\| [[PDP-16]] \|\|   \|\| Not an actual computer; custom industrial controllers built out of [[Register Transfer Modules]]		\| [[PDP-16]] \|\|   \|\| Not an actual computer; custom industrial controllers built out of [[Register Transfer Modules]]
	\|-		\|-
	\| PDP-20 \|\| \|\| ''Not a real name!'' Sometimes used for DEC-20 computers.		\| PDP-20 \|\| 36 \|\| ''Not a real name!'' Sometimes used for DEC-20 computers.
			\|}

			A number of other designs never existed as real machines, only on paper:

			{\| class="wikitable"
			! Family/Machine !! Word Size !! Comment
			\|-
			\| PDP-2 \|\| 24 \|\| Never designed
			\|-
			\| PDP-2 ½ \|\| \|\| "Casino" by Ed Rawson of the American Science Institute.
			\|-
			\| PDP-24 \|\| 24? \|\| Unconfirmed, mentioned in [http://bitsavers.org/pdf/dec/pdp-x/03.pdf PDP-X memo 3].
			\|-
			\| [[PDP-K]] \|\| 18 \|\| Intended as a bridge between the PDP-15 and the PDP-10 family
			\|-
			\| [[PDP-X]] \|\| 16 \|\| An alternative to the PDP-11
	\|}		\|}

Larsbrinkhoff: PDP-20.

2022-03-23T06:18:02Z

PDP-20.

← Older revision		Revision as of 06:18, 23 March 2022
Line 39:		Line 39:
	\|-		\|-
	\| [[PDP-16]] \|\|   \|\| Not an actual computer; custom industrial controllers built out of [[Register Transfer Modules]]		\| [[PDP-16]] \|\|   \|\| Not an actual computer; custom industrial controllers built out of [[Register Transfer Modules]]
			\|-
			\| PDP-20 \|\| \|\| ''Not a real name!'' Sometimes used for DEC-20 computers.
	\|}		\|}

Larsbrinkhoff: PDP-24 ???

2022-03-23T06:15:27Z

PDP-24 ???

← Older revision		Revision as of 06:15, 23 March 2022
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	\|-		\|-
	\| [[PDP-9]] \|\| 18		\| [[PDP-9]] \|\| 18
			\|-
			\| PDP-24 \|\| \|\| Unconfirmed, mentioned in [http://bitsavers.org/pdf/dec/pdp-x/03.pdf PDP-X memo 3].
	\|-		\|-
	\| [[PDP-10]] \|\| 36 \|\| DEC's mainframe		\| [[PDP-10]] \|\| 36 \|\| DEC's mainframe

Jnc: Sigh, maybe we've finally got it this time

2021-05-11T18:10:59Z

Sigh, maybe we've finally got it this time

← Older revision		Revision as of 18:10, 11 May 2021
Line 1:		Line 1:
	'''Programmed ~~Digital~~ Processor''' was the name adopted by [[Digital Equipment Corporation]] for all its early computers. (Reportedly, it was adopted to avoid worrying its early venture capital backers; at the time, almost all computers were large [[mainframe]]s, and DEC's founders were concerned that if it appeared that they intended to compete in that market, they wouldn't be able to get funding.)		'''Programmed Data Processor''' was the name adopted by [[Digital Equipment Corporation]] for all its early computers. (Reportedly, it was adopted to avoid worrying its early venture capital backers; at the time, almost all computers were large [[mainframe]]s, and DEC's founders were concerned that if it appeared that they intended to compete in that market, they wouldn't be able to get funding.)

	The name was dropped starting with the [[VAX]]. The other PDP families (most included more than one model) were:		The name was dropped starting with the [[VAX]]. The other PDP families (most included more than one model) were:

Jnc: Jnc moved page List of Programmed Digital Processors to List of Programmed Data Processors without leaving a redirect

2021-05-11T18:09:59Z

Jnc moved page List of Programmed Digital Processors to List of Programmed Data Processors without leaving a redirect

← Older revision		Revision as of 18:09, 11 May 2021
(No difference)

Jnc: Misspelled

2021-05-11T15:21:55Z

Misspelled

← Older revision		Revision as of 15:21, 11 May 2021
Line 1:		Line 1:
	'''~~Programmable~~ Digital Processor''' was the name adopted by [[Digital Equipment Corporation]] for all its early computers. (Reportedly, it was adopted to avoid worrying its early venture capital backers; at the time, almost all computers were large [[mainframe]]s, and DEC's founders were concerned that if it appeared that they intended to compete in that market, they wouldn't be able to get funding.)		'''Programmed Digital Processor''' was the name adopted by [[Digital Equipment Corporation]] for all its early computers. (Reportedly, it was adopted to avoid worrying its early venture capital backers; at the time, almost all computers were large [[mainframe]]s, and DEC's founders were concerned that if it appeared that they intended to compete in that market, they wouldn't be able to get funding.)

	The name was dropped starting with the [[VAX]]. The other PDP families (most included more than one model) were:		The name was dropped starting with the [[VAX]]. The other PDP families (most included more than one model) were: