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Topic: PDP-11

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In the News (Wed 24 Apr 19)

 PDP-11 - Wikipedia, the free encyclopedia
The PDP-11 was a successor to DEC's PDP-8 computer in the PDP series of computers.
PDP-11/73 -- The third generation LSI PDP, this system used the "Jaws-11" chip set.
The PDP-11 was a 16-bit minicomputer sold by Digital Equipment Corp. in the 1970s and 1980s.
en.wikipedia.org /wiki/PDP-11   (2832 words)

 PDP Planet: PDP-10, DEC, TOPS-20, Community & Portal
PDP Planet is a portal into the Paul Allen collection of Digital Equipment Corporation mainframes and minicomputers, where pride of place is given to two PDP-10 systems (a 2065 running the Tops-10 operating system, and a 1090 scheduled to be brought up later this year).
These will be available through the PDP Planet Web site, as will descriptions of the work done in restoring the hardware to working condition, and recommendations for how others can leverage our restoration work for their own projects.
PDP Planet also fulfills my hope that the achievements of early computer engineers aren't lost to time.
www.pdpplanet.com   (370 words)

 PDP-11/44 - Wikipedia, the free encyclopedia
The PDP-11/44 is the last PDP implemented in discrete logic, the cpu consists of 5 boards, options were floating point (FP-11, one board) and commercial instruction set (CIS, two boards).
The cache is marked as optional, but apparently the cacheboard was always shipped with the cpu.
en.wikipedia.org /wiki/PDP-11/44   (102 words)

 RSX-11 - Wikipedia, the free encyclopedia
But, there are differences between RSX and OSRV because of differences between SM and PDP' hardware and recognised by Soviet engineers bugs in RSX.
en.wikipedia.org /wiki/RSX-11   (889 words)

VAX, strongly influenced the design of microprocessors such as the Motorola 6800 and Intel 386, and left a permanent imprint on the C language (which has an odd preference for octal embedded in its syntax because of the way PDP-11 machine instructions were formatted).
Along the way, the 11 gave birth to the
www.infoplease.com /computers/jargon/P/PDP-11.html   (102 words)

The PDP line was not referred to as "computers" by Digital.
This was because the word computer was associated with large, expensive machines which needed a computer center and large staff.
Instead, it was comprised of two seperate circuit boards which performed the processor operations.
www.cs.cuw.edu /museum/PDP11.html   (68 words)

\The pdp-11 was by far the most successful of DECs pdp series, outselling all the others combined, several times over.
The 11/70 came from the North-East Thames Regional Health Authority, where it was used with 3 other systems to run health admin s/w under MUMPS.
www.corestore.org /pdp-11.html   (121 words)

 :: PDP-11 ::
The PDP11/20 was the only '11' not to have a microcoded processor, suitable ROMS were unavailable at the time.
A typical early PDP11/20 system might consist of the CPU, 8 or 16 Kbytes of core memory, a ASR-33 teletype as console and a high-speed reader/punch.
The 'core' memory was comparatively slow at 1.2us for a read/write cycle.
a.parsons.edu /~sachiko/hCw/002/pdp_11.html   (437 words)

The manual for the PDP was PDP-1, and they intended it to stop there.
DEC apparently decided that "PDP" had a perjorative ring to it.
PDP Summary -- all about various PDP's Mr.
inwap.com /pdp10/pdp-model.txt   (3718 words)

 PDP 11/34
I also found documentation for a PDP 11/05 in the pile and, a box of 8" floppies, and a box of paper tapes.
There were also 2 bakplanes in a second box and a bunch more cards which I'll list latter.
There are also a bunch of disks for the RL01.
www.classiccmp.org /pipermail/cctalk/2001-June/174677.html   (336 words)

 Computer Architecture Video
Tara is enthralled by the archaic size and noise of the PDP - 11/10.
Tara takes her hand at learning the dynamics of punch cards and running actual code through PDP - 11/10.
Doug, our computer scientist of the past, explains the specifications of the PDP - 11/10 to our two time travelers.
computersystems.jbpub.com /video.cfm   (205 words)

 PDP-11 Unix Preservation Society
The lastest BSD Unix for the PDP, 2.11 BSD, is still being developed by Steven Schultz, and has many of the 4.4BSD-Lite features.
The PDP Unix Preservation Society is devoted to the preservation of all information related to the versions of Unix that ran on PDPs.
The PDP Unix Preservation Society will be more than happy to copy information on paper, mag tapes and anecdotes from you.
minnie.tuhs.org /Seminars/AUUG96/pdppaper.html   (1249 words)

1.1 MAIN UNIT The main unit is the enclosure housing the CPU and the disk drives.
In no event will the editors be liable for direct, indirect, incidental, or consequential damages resulting from the use of this book, or any errors in it, even if the editors have been forewarned of the possibility of such errors.
It is also possible to place other units in the main unit, but most are stored in external housings of their own.
www.skrenta.com /pdpbook.txt   (4293 words)

 PDP-11 - Introduction
After the success of the PDP-8, leading hardware engineer Edson DeCastro designed a 16-bit machine under the codename "PDP-X", which was rejected in favor of another machine, to be known as the PDP-11.
The last machine marketed under the name "PDP" was the -16 in 1972.
The -10 was another classic, the PDP of the mainframe-class.
hampage.hu /pdp-11/main.html   (877 words)

 Microverter- Unibus to Qbus conversion for PDP to LSI-11 migration
Microverter- Unibus to Qbus conversion for PDP to LSI-11 migration
Millions of dollars have been spent on software applications that ran on PDP-11 computers under
There are thousands of ABLE bus converters in the field extending the life of PDP and early
www.able.com /wizzw.html   (342 words)

Today, all of the PDP machines are in DEC's corporate past, with the exception of the PDP-11 family of minicomputers and microprocessors.
In early DEC documentation, plural form "PDPs" is used as a generic term for all DEC computers.
A major benefit over FORTRAN and other higher level languages that were written for the PDP where you are restricted to the functions provided in the language.
www.village.org /pdp-11/faq   (16501 words)

When one screen is being displayed on the PC screen, the others (up to 11) are maintained invisibly in memory, so they will be up to date when you switch the display to them by pressing Alt and the function key for the screen you want.
The idea I'm toying with is having the init file say which protocol numbers the 11 needs to receive and then registering those with a packet driver, then simulating a DELUA which "hears" only those packet types.
If something else is there (like the pack label in Files-11 and RDS 1.1 and later, or the MFD in RDS 0.0), they will replace blocks at random and you'll get a corrupted disk image (yes, I'm sure :-).
highgate.comm.sfu.ca /pups/PDP-11/Emulators/Ersatz-1.1beta/Version1.0/e11.doc   (4256 words)

 Digital Equipment Corporation (DEC) Vintage Mini- & Microcomputers
Calendar was on the PDP 11/23 (running RT-11 and TSX) at Northport High School, revised by E. Schaefer at a nearby school in March 1975; it was enhanced by David Kraus in November 1982.
The most popular and well-known of these PDP's were the PDP-8, 10 and 11 minicomputers; the latter made its debut in June 1970.
Newer PDP-11's were manufactured in subsequent years with more memory, speed and disk capacity; this continues today with PDP-compatible hardware and PDP emulators for non-PDP hardware.
www.eskimo.com /~nickz/dec.html   (4292 words)

 XXDP and formatting MFM drives
Note the ".", otherwise E11 assumes an extension of ".pdp".
users.safeaccess.com /engdahl/xxdp.htm   (847 words)

 PDP-11 target for lcc
For instance, I believe it is difficult to make use of the PDP's auto-increment and auto-decrement modes, because lcc must represent the increment and dereference as separate trees, precluding templates.
The PDP supports this indirection by "Deferred" variants of the modes already described, encoded by '@' in the instruction format.
However, within these parameters, I think the generated code is not too bad (I would like to compare in detail to other PDP compilers such as DECUS C or pcc).
www.telegraphics.com.au /sw/info/lcc-pdp11.html   (6345 words)

 [SunRescue] Free PDP-11 equipment: [3 PDP-11s in working order]
We have a lift which is capable of carrying the PDPs down to ground level.
I'd go get them at the drop of a hat, even though I know, I don't have the room and my wife, would create more heat than appollo 11 did.
You (or the person who wants it) must also agree not to make any BA programs or BA data which can found or recovered from the machines available to anyone, or use it in any way or for any purpose.
www.sunhelp.org /pipermail/rescue/2001-April/023552.html   (382 words)

 C H D - DEC PDP-11
PDP Unix Preservation Society - A source for many of the original Unix versions.
Many of which have now been placed under a BSD style license and can be modified and distributed freely.
These are some sources that I have found helpful.
www.chd.dyndns.org /pdp11   (1188 words)

 DEC PDP-11/34
It got old after a while, though, especially since in order to use the system, I had to schedule time on the 11 and do a fair bit of setup in order to boot the system.
www.msu.edu /~mrr/mycomp/pdp1134.htm   (615 words)

Today more than half a million PDP- 11 systems are still operating around the world.
this was the first system to run an AT&T UNIX which was written in C. (C was not available for the PDP-7, but was written by AT&T researchers for the 11.) It was also the PDP-11 on which BSD UNIX was first developed.
The phenomenal popularity and growth of the PDP-11 product line led to a change in Digital's organizational structure.
ed-thelen.org /comp-hist/pdp-11.html   (529 words)

 eBay - pdp 11, Vintage Computing Products, Nonfiction Books items on eBay.com
Basic for Business for the PDP 11 by Allan J. Parker
DEC DIGITAL PDP 11 UNIBUS connector, inverted M9202
DEC PDP Q-BUS PDP-11 11/23 LSI Digital M7731 M7389
search-desc.ebay.com /search/search.dll?query=pdp+11&newu=1&krd=1   (434 words)

 The PDP-11 Unix Preservation Society
The Unix Heritage Society, is devoted to the preservation of all information related to the versions of Unix that ran on Digital PDPs.
If you have something that you think should be preserved, or if you have any experience with PDP Unix, please let us know!
The PDP Unix Preservation Society (PUPS), part of
minnie.tuhs.org /PUPS   (102 words)

 CNCzone.com-The Ultimate Machinist Community - TU48 Tape emulator (on PDP-11)
The next stage would be to emulate keyboard and screen, which raises some big problems too, and whom controllers communicate with the PDP using a serial link too.
It can both get the bios data from the PDP and store it on the PC or send the saved data to the PDP.
This program uses the RS-232 link of PC (serial link) to communicate directly to the PDP.
www.cnczone.com /forums/showthread.php?t=14876&goto=newpost   (220 words)

This will probably require a math coprocessor (you paid thousands to get it for your PDP-11, dropping a $50 chip in your PC doesn't seem like too much to ask).
The idea I'm toying with is having an init file which says which protocol numbers the 11 needs to receive and then registering those with a packet driver, then simulating a DELUA which only "hears" those packet types.
highgate.comm.sfu.ca /pups/PDP-11/Emulators/Ersatz-1.1beta/Old/e11beta.txt   (1575 words)

 PDP11 RT11 Games
PPD11/45 Front Panel from the First PDP11 I used, second computer I used.
If you have RX33s, you can use either PUTR or copy them straight to a 1.2 meg floppy from PC/AT and them on the PDP or use the create command to create the file pointers....
Hence you either need to use Putr to extract the files or run LD.SYS on your PDP.
www.geocities.com /CapeCanaveral/5517/pdp11.htm   (288 words)

 PDP-11 - a Whatis.com definition
To dissociate their product line from these public perceptions, DEC didn't refer to the PDP as a computer at all, but used its name, the Programmed Data Processor, as a generic term.
DEC's first model, PDP-1 sold for $120,000 - about 40 times the price of a good computer today, but a bargain at the time.
Furthermore, computers of the time were so large and complex that a computer center was required to house one and a sizable staff was required to look after it.
whatis.techtarget.com /gDefinition/0,294236,sid44_gci862963,00.html   (300 words)

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