PDP-6 - Revision history

Larsbrinkhoff: Unredirect ITS.

2023-09-06T05:28:07Z

Unredirect ITS.

2023-07-11T11:33:18Z

36-bit cat.

2023-03-28T11:01:35Z

Make the "external links" section don't look so butchered.

2023-03-06T12:06:13Z

‎External links: Photo timeline of the MIT AI lab PDP-6

2023-03-06T08:26:33Z

‎External links: +pdp-6.net

2022-08-09T00:23:26Z

use new inst speed

2022-08-06T21:57:59Z

‎External links: +Business Week article on the PDP-6

2022-01-13T13:37:48Z

Have Monitor link to TOPS-10 article.

2022-01-13T06:02:42Z

Link to JOSS.

2022-01-11T17:20:19Z

‎External links: +Engineering Drawings

@@ Line 15: / Line 15: @@
 | memory speed = 5 μsec (inital), 2 μsec (later)
 | memory mgmt = single base and bounds register pair
-| operating system = [[TOPS-10|Monitor]], [[ITS]], [[WAITS]], [[JOSS|JOSS II]]
+| operating system = [[TOPS-10|Monitor]], [[Incompatible Timesharing System|ITS]], [[WAITS]], [[JOSS|JOSS II]]
 | predecessor = None
 | successor = [[KA10]]

@@ Line 22: / Line 22: @@
 [[Image:Tk-pdp6-cropped.jpeg|thumb|left|400px|The [[MIT_Artificial_Intelligence_Laboratory|MIT AI lab]] PDP-6 console]]
 The '''PDP-6''' was effectively the first model of the [[PDP-10]]; they are (mostly) [[object code]] compatible. It was built out of [[System Module]]s, [[DEC]]'s predecessor to the [[FLIP CHIP]] module series (out of which the first [[PDP-10]], the [[KA10]], was built).
 It featured 36-[[bit]] [[word]]s, at the time effectively the standard for machines used for scientific computing. In a period when almost all [[program]]ming was done in [[assembly language]], it used those long words to provide a powerful and regular [[instruction set]].
 The machine was not a success, commercially (only 23 were sold), in part because the hardware was unreliable - largely because of one type of large System Module, which contained one bit of the entire [[ALU]] section of the [[CPU]] - a 'bridge too far' at the then-current state of [[printed circuit board]] technology.
@@ Line 34: / Line 34: @@
 {{semi-stub}}
 ==External links==

@@ Line 49: / Line 49: @@
 * [https://github.com/aap/pdp6 Simulator based on processor schematics]
 * [https://gordonbell.azurewebsites.net/Digital/A_Computer_that_grows_BusWeek_640314.pdf A computer that grows with you] - Business Week article on the PDP-6
+* [http://its.pdp10.se/pdp6-timeline/ Photo timeline of the MIT AI lab PDP-6]
 [[Category: DEC Systems]]

@@ Line 32: / Line 32: @@
 According to Tim Anderson, the Project MAC group Dynamic Modeling/Computer Graphics took delivery of the very last PDP-6 from a previous owner. They adopted the AI Lab's [[Incompatible Timesharing System‎|ITS]] [[operating system]], but shortly after moved onto a PDP-10.
 ==External links==
@@ Line 38: / Line 40: @@
 ** [http://bitsavers.org/pdf/dec/pdp6/F-65_PDP-6_Handbook_Aug64.pdf Programmed Data Processor-6 Handbook] (F-65)
 ** [http://bitsavers.org/pdf/dec/pdp6/F-67_166instrManVol2_Sep65.pdf PDP-6 Arithmetic Processor 166 Instruction Manual - Volume 2] (F-67(166)) - contains the Engineering Drawings for the CPU
-* [https://gordonbell.azurewebsites.net/Digital/A_Computer_that_grows_BusWeek_640314.pdf A computer that grows with you] - Business Week article on the PDP-6
+* [http://pdp-6.net/ PDP-6 and -10]
 * [http://ed-thelen.org/comp-hist/pdp-6.html PDP-6]
 * [http://www.decodesystems.com/pdp6.html The DEC PDP-6 Time-Sharing Computer]
 * [http://www.ultimate.com/phil/pdp10/pdp6-serials.html DEC PDP-6 Serial numbers]
 * [https://github.com/aap/pdp6 Simulator based on processor schematics]
 [[Category: DEC Systems]]

@@ Line 12: / Line 12: @@
 | logic type = germanium and silicon [[transistor]]s
 | design type =  asynchronous with hardware subroutines
-| clock speed = 4 μsec (approximately - different instructions take different amounts of time, the CPU is not synchronous)
+| instruction speed = 4 μsec (approximately - different instructions take different amounts of time; the CPU is not synchronous)
 | memory speed = 5 μsec (inital), 2 μsec (later)
 | memory mgmt = single base and bounds register pair