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Topic: PDP-8

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In the News (Thu 18 Apr 19)

 PDP-8 - Wikipedia, the free encyclopedia
A PDP-8 on display at the Smithsonian's National Museum of American History in Washington, D.C. This example is from the first generation of PDP-8s, built with discrete transistors and later known as the Straight 8.
The PDP-8 was the first successful commercial minicomputer, produced by Digital Equipment Corporation (DEC) in the 1960s.
It was introduced on March 22, 1965 [1] and was the first widely sold computer in the DEC PDP series of computers (the PDP-5 was not originally intended to be a general-purpose computer).
en.wikipedia.org /wiki/PDP-8   (1608 words)

 PDP-11 - Wikipedia, the free encyclopedia
The PDP-11 was a successor to DEC's PDP-8 computer in the PDP series of computers.
Of the 8 registers (numbered 0 through 7), 7 were general-purpose and could be used for most purposes, although register 6 was specially recognized by the hardware as the stack pointer for some instructions; register 7 was the program counter.
PDP-11/73 -- The third generation LSI PDP, this system used the "Jaws-11" chip set.
en.wikipedia.org /wiki/PDP-11   (2934 words)

The 8/l is essentially a stripped-down 8/i, and as such can have only 8 (or 12) K and a positive bus, whereas later 8/i's could have either bus.
I have once discussed the feasibility of upgrading the 8/s, and the consensus was that it could be done, but it might run a bit slower, and in any case would require a rack of cards hanging out of it.
The manual for the PDP was PDP-1, and they intended it to stop there.
www.inwap.com /pdp10/pdp-model.txt   (3718 words)

 The PDP-8 Family
Based on the Intersil 6100 microprocessor, this was built to run the same word processing software as the PDP-8a but it fits entirely inside the case of the video terminal.
The successor to the Classic 8 was the first to use TTL integrated circuits.
Files were stored on 8 inch floppy disks using the two drives on the left.
www.piercefuller.com /collect/pdp8.html   (377 words)

 PDP-8 Summary of Models and Options (posted every other month)
By February 1975, the PDP-8/A was being sold in a workstation configuration, with the CPU and dual 8" diskette drives in a desk with a video terminal (VT52) and optional letter quality printer on top.
(the 6th contact group was not connected on most backplane slots; the 5th was unsupported on 8 of the 12 or 20 backplane slots, and was used primarily for additional power and ground distribution).
Some boards, notably memory boards, had a total of 8 connector fingers, 4 for the omnibus and 4 for interboard connectors.
www.cs.uu.nl /wais/html/na-dir/dec-faq/pdp8-models.html   (8924 words)

In the left-hand picture, from left to right, we have: 2 a pdp-8a with 2 RL01s, rare fixed head disks (DF32) and an RX02 8" floppy, a rack with a TU10 tape and controller, and 2 RK05 disks and a pdp-8e with damaged front panel.
These racks of assorted horrors are part of the large collection I took away from British Aerospace, Preston, along with the main item, pdp-15(2).
www.corestore.org /pdp-8e-1.htm   (258 words)

 Another Real Machine: The DEC PDP-8
With the PDP 8/e, the Extended Arithmetic Element was modified slightly.
The PDP 8/e version added features useful for running a multi-user operating system.
The PDP 8/I did not change the format of the Extended Arithmetic Element instructions, but it did add one opcode:
www.quadibloc.com /comp/cp0306.htm   (2349 words)

 PDP-8 Frequently Asked Questions (posted every other month)
Today, all of the PDP machines are in DEC's corporate past, except the PDP-11 family, which survives as a line of microcomputers; DEC has promised to discontinue PDP-11 sales on Sept. 30, 1996.
It is amusing to note that the name TPA is very similar in origin to the name PDP used by DEC! There was a decree that computer development in Hungary was to cease, with all computers to be purchased from the USSR.
The venture capitalist's insistance on avoiding the term computer was based on the stereotype that computers were big and expensive, needing a computer center and a large staff; by using the term Programmable Data Processor, or PDP, DEC avoided this stereotype.
omicron.felk.cvut.cz /FAQ/articles/a1784.html   (9489 words)

The PDP-8 was also known as the "Classic 8." It used the newly announced R Series logic.
www.computermuseum.li /Testpage/DEC-PDP-8.htm   (59 words)

 :: PDP-8 ::
It has 8 basic instructions and the PDP-8/E executes them in 1.2 microsecond for simple instructions to 4 microsecond for complex memory reference instructions.
The PDP-8 is a 12 bit single accumulator machine which can address up to 32K 12 bit words.
a.parsons.edu /~sachiko/hCw/002/pdp_8.html   (166 words)

 Mark-8 Microcomputer - The Beginning
We were ecstatic when our basic PDP-8/L got an upgrade to 8 kwords, but the extra memory took up about the same space as the PDP-8/L computer itself.
This shrine to the Mark 8 Minicomputer discusses the machine with its designer, Jon Titus.
Jon was gracious enough to write up most of the data you see here, and also provide some of the diagrams and pictures.
www.his.com /~jlewczyk/adavie/mark8b.html   (1237 words)

 PDP-8 Assembler
all numbers are assumed octal unless they contain an 8 or 9 (e.g 028) or use a 'd' suffix (e.g.
symbols (identifiers) begin with a letter followed by zero or more letters and or digits; symbols are not case sensitive; symbols should be no more than 8 characters
userpages.wittenberg.edu /bshelburne/Comp255S/PDP8Assembler.htm   (583 words)

 The Krten Collection: PDP-8, PDP-11, PDP-12, And Others
The 8/I is the second-largest of the PDP-8 systems (the "straight-8", an 8 with no suffix, is bigger).
The PDP-8 had a very simple architecture -- 8 basic instructions, a 12-bit word, and 4k to 32k words of core (magnetic) memory.
DEC was bought out by Compaq, and now Compaq has merged with Hewlett-Packard.
www.parse.com /~museum/pdp8   (340 words)

 PDP-8/SL Update
Paper Tape Reader Reading in FOCAL '69 (With Genuine PDP Tape, of Course)
As long as no one touches the terminal while reading a tape (and tape is not read during console input), this works well.
The paper tape reader I wanted to use with this computer requires 24 volts DC, and I originally designed a small desktop power supply for it consisting of a 30 volt wall wart and a 323K that dropped this to 24 volts.
juliepalooza.8m.com /sl/pdp8e-2.htm   (471 words)

 PDP-8/IBM-370 Communication
Setting the counter to 8 on every transition of the data line locked the clock to the data stream.
The oscillator drove a divide by 16 counter to generate the clock signal.
Five years later, and four years after I left the Acushnet Company, the link failed to handle certain file transfers.
www.sullutions.com /ComputerCommunication.html   (357 words)

 Steve Jones/Bio
(His first computer experience was with a PDP 8/e.) He received his Ph.D. in Communication from the Institute of Communications Research there in 1987, and is author of numerous books, including Society Online, Doing Internet Research, CyberSociety, Virtual Culture, and Pop Music and the Press.
Steve Jones has been Internetworking since 1979 when he was using and co-authoring educational materials on the PLATO system at the University of Illinois Urbana-Champaign.
info.comm.uic.edu /jones/bio.html   (327 words)

 PDP 8/L console
> >From: Lawrence LeMay > >My PDP 8/L that I recently acquired, has a cable that i assume is for > >the console terminal.
It has a 9 pin male connector with only pins > >1 through 6 present.
www.classiccmp.org /pipermail/cctalk/2000-May/145428.html   (417 words)

12 bit words, 8 instructions, instruction was 3 bits - same instruction set as PDP-5 Architecture max addressability (except for special tricks in some models) - 4096 words
OS-8, an 8 inch floppy disk operating system, nicely done.
Identical instruction set to PDP-5 except that P Counter was in a real register instead of memory location 0
ed-thelen.org /comp-hist/pdp-8.html   (1122 words)

 PDP-8 Technology Before The Millennium
Restore PDP computers to join our member pages.
www.pdp8.com   (60 words)

 PDP-8 Simulator Explained
I wrote this PDP-8 simulator at the same time.
One could assemble a program with no more than a basic 8 and a teletype.
But the arduous process involving feeding multiple paper tapes multiple times through the teletype's ten character per second reader.
c2.com /~ward/pdp8sim   (688 words)

Instruction set: 3-bit op code, 1 indirect bit; 8 bits of address
research.microsoft.com /~gbell/Digital/timeline/1965-2.htm   (20 words)

 Brian Shelburne's PDP-8 Home Page
The PDP-8 was a simple 12-bit word addressable machine with 4096 words of memory and only 8 opcodes.
The clean simple and elegant architecture of the classic PDP-8 makes it ans ideal candidate for studying computer organization.
Its simplicity and relatively inexpensive price tag, a mere $18,000.00, made it extremely succesful.
www4.wittenberg.edu /academics/mathcomp/bjsdir/PDP8HomePage.htm   (821 words)

That was worked out and I made an 8.5 hour drive (each way) to pick up the 8.
When I got there, they were ready and powered everything up so that I knew it all worked.
The big sticking factor was being able to pick up the equipment.
www.shiresoft.com /pdp-11/pdp8e   (358 words)

 Highgate's PDP-8 Page
System Reference Manual, Version 8 (Chapters 5 to 18)
System Reference Manual, Version 8 (Chapters 1 to 4)
WPS-8 Word Processing System Reference Manual (Chapters 1 to 8)
highgate.comm.sfu.ca /pdp8   (1052 words)

 PDP-8 Summary of Models and Options (posted every other month)
AN/GYK-6, (Army-Navy Ground-based (Y)data-processing Komputer 6) Price: $18,000 Technology: Mostly standard DEC R-series logic modules; these were originally discrete component transistor logic, but around the time the PDP-8 was introduced, DEC introduced the Flip Chip, a hybrid diode/resistor "integrated circuit" on a ceramic substrate.
It is worth noting that the PDP-8 was about as fast as was practical with the logic technology used; only by using tricks like memory interleaving or pipelining could the machine have been made much faster.
These could directly replace some of the discrete components on some logic modules, and DEC quickly began to refer to all R-series modules as flip-chip modules; they even advertised the PDP-8 as an integrated circuit computer.
www.faqs.org /faqs/dec-faq/pdp8-models   (8905 words)

 The PDP-11 FAQ
It combined a LINC and a PDP-8 type processor in the same box and basically was a new model of the LINC-8 which was the same thing.
It was used as a process control engine in applications that were felt to be too rugged for a PDP-8, and basically replaced a set of relays.
DEC apparently decided that "PDP" had a perjorative ring to it.
www.village.org /pdp11/faq.pages/Crispin.html   (1084 words)

 Online PDP-8 Home Page
It has 8 basic instructions and the PDP-8/E executes them in 1.2 microsecond for simple instructions to 4 microsecond for complex memory reference instructions.
The PDP-8 is a 12 bit single accumulator machine which can address up to 32K 12 bit words.
www.pdp8.net   (540 words)

 Encyclopedia: Unix
Jump to: navigation, search Research Unix is a term commonly used to refer to versions of the Unix operating system for DEC PDP-7, PDP-9 PDP-11 and VAX and Interdata 7/32 and 8/32 computers, developed in the Bell Labs Computing Science Research Center.
Versions 8, 9 and 10 were developed through the 1980s but were only ever released to a few universities, though they did generate papers describing the new work.
Version 7 Unix, the last version of Research Unix to be released widely, was released in 1979.
www.nationmaster.com /encyclopedia/Unix   (11357 words)

One caution: I haven't verified that the PDP 8/L in question is the DEC product referred to in the original posts.
This track consists entirely of tapes of Sonja's voice analysed and processed by a PDP 8/L computer and a Synthi ^^^^^^^ 100 synthesizer.
DEC PDPs and Music/Sound Synthesis Summary ============================================================+ Revision 2b, December 2, 1995 _-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_ When I began compiling this data, I was mostly interested in applications using DEC PDP-11s for music and sound synthesis, as I plan on experimenting with this when I get a chance to do so.
www.village.org /pdp11/pdp11.music   (5902 words)

 The PDP-2 computer
Digital originally published plans to market PDP processors with word lengths of 18, 24, 30 and 36 bits(1).
The memory reference format is: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
The shift group format is: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
lightning.locl.net /homes/pdp2   (1122 words)

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