Photos and inventory of 11/20 system and documents

This Web page provides a partial inventory of the 11/20 Greenough collection, through photos and listing of items. It includes correspondence from Greenough in 2008 about the developing exhibit and Web page descriptions of the collection. The 11/20 inventory is referenced on the Web page representing that collection. This Web page was last updated Aug 15 2008.

Photos of system

Aug 2007 photos

These are photos of the donated items, in place at MARCH/Infoage, taken by Herb Johnson.

Herb Johnson with the 11/20
Evan Koblentz, co-founder and current Board President of MARCH
The 11/20 with a VT-100 terminal (not part of Greenough's donation) and docs and software (paper)
The 11/20 front panel
More docs, power supply, 11/20

docs and media:
photo of MACRO-11 assembler listing
photo of box of rolled tapes, handbooks
photo of a collection of PDP-11 brochures
photo of a colorful manual cover
photo of typical manual cover: DL11-W
photo of schematic for DIODE 128 byte memory
photo of handbooks, a manual, some rolled tapes, a PDP-11 programming card
photo of 1971 DEC installation report for one system
photo of typical long binder for hardware engineering manuals
photo of one of MANY sets of folded paper tapes for the PDP-11
photo of three segments (of 10!) of a PDP-11 programming card
photo of one of many engineering schematics

sales brochures, prices and specifications
1971 groovy sales image of PDP-11 installation: from price list brochure
photo of PDP-11 site in LegoLand?
image of PDP-11 description
image of PDP-11/10, /20 specifications
photo of 1971 price sheet: system, mass storage
photo of 1971 price sheet: disk, cards, papertape devices

Aug 2007 Interior photos of the PDP-11/20:

photo, open "top" showing backplane from rear
photo, list of cards installed in 1970
photo, side fans
photo, internal cables
photo of 3X3 Molex connector on cable
photo of 8-pin Molex connector on cable
photo of 37-year-old foam cushioning
photo of 11/20 card set
photo of 11/20 card cage interior
photo of M724 chips on "rear" edge of card
photo of top front of backplane where Unibus would be cabled
photo of cable going into M792YA card
photo of M821 chips on "rear" edge
photo of G102 chips on "rear" edge
close photo of top front of backplane where Unibus would be cabled
photo of M792 diode memory

Aug 2008 photos

better photo of front panel
better photo of ALL boxes, with yellow lables
better photo of cards in 11/20

Greenough donation, contents and correspondence

The Greenough collection inventory was created Oct 7 2007 by Herb Johnson, and updated at intervals. Paper copies of this inventory placed in some of the boxes Aug 3 2008. Photos of boxes with yellow lables "11/20 Greenough", taken Aug 3 2008. Last edit Aug 15 2008. - Herb Johnson

PDP-11/20, two seperate power supplies, several boxes

11/20 system cabinet with boards including:
# KA11 CPU to run the programs
# KWllL or KY11L programmer's console or front panel
# RL11A or DL11A Teletype serial interface
# three MM11FX modules of 8K bytes of RAM

Documents and hardware as donated by Greenough:
White box with manuals labled "9 liters"
Brown box, "PDP-11 Paper Tape Prog. from USPS Mach. FOSDIC VI"
Small box tied with twine: "Precision Systems", has Unibus cables.
Loose white binder
Small box, "PDP-11 Paper Tape Progr from NEWMAN 1977"
low flat box with twine, "CUSTOM PRINTING CO"
Brown box, tied with twine, "PDP-11 PROGRAMS"
Brown box, low and long and flat, "PDP-11 Manuals from NEWMAN":
White box, low and flat, with lid. "spare group" manuals, with list
Black-painted power supply. Also a white box with another power supply.

Documents and photos provided by M. Leighton Greenough

Mr. Greenough corresponded with me in 2008 and provided the following materials, which will be given to MARCH. - Herb Johnson

Letter, photos, CD-ROM sent Feb 19 2008. Leighton provides materials on the history of the 11/20 and of work related to its use. Included is a three-page document "Digital Equipment Corporation PDP11-20 used in the FOSDIC system" dated Feb 5 2008 by M Leighton Greenough. Much of this document was incorporated into the Web pages and the Exhibit posters. He provides 8 X 11 black and white photos of the Postal Scanner, a graphic "Basic operating principle of FOSDIC", a photo of the 11/20 in the Postal Scanner, and of two operators of the scanner in 1970. The CD-ROM contains TIF files of the photos, and DOC files of the documents.

Letter of May 19th 2008. Leighton describes his current relationship with the Census Bureau on the history of FOSDIC activity, and describes the specific role of the donated 11/20. There are two pages of suggested changes in my Web descriptions of FOSDIC and its history. These were incorporated into the Web pages and the Exhibit posters.

Boxes and contents, loose items

White box, prior use label says "9 liters", with manuals:

Blue Binder: PDP-11 Paper Tape Software Programming Handbook, DEX-11XPTSA-A-D Feb 1973

Black Binder:
DL11-W serial line unit/ real time clock option operator's manual EK-DL11W-OP-001 May 1977
DL11-W serial line unit/ real time clock option maintenance manual EK-DC11W-MN-001 Apr 1977
M9301 bootstrap/terminator moudle maintenance and operator's manual EK-M9301-TM-001 Jun 77
"condensed operating instructions", load address and data to start 11/20
Copy, DZ11 programming manual, a chapter.

Black Binder: copy, DL11 asynchronous line interface manual, DEC-11-HDLAA-B-D

Brown binder:PDP-11 PAL-11S Assembler & Link series?
Progammer's Manual DEC-11-YRWA-D Aug 71
Listing of ODT-11 DEC-11-OiPA-LA Apr 70
listing of ODT-11X DEC-11-02PB-LA Jan 71
Listing of IOX DEC-11-Y1PA-LA

Brown Binder: Software Summary for the PDP-11: publications as follows:
Vol 1 #7, #8; Vol 2 #3, #7, #8

Brown box, "PDP-11 Paper Tape Prog. from USPS Mach. FOSDIC VI"

large number of paper tapes from DEC, DECUS:

Blue tray #1: DECUS tapes:
- 11-15, PDP-11 Datapoint editor (2 tapes)
- 11-12 AC Circuit Analysis PDP-11 BASIC
- 11-4 Boot formatter, FOCAL-11
- 11-4 PDP-11 Binary loader, ABS
- 11-13 ADUMP BIN Position independent
- 11-13 ADUMP POSITION Indep. ASCII
DIGITAL tapes:
MAINDEC-00-D2G4-DT 8/15/68 Speical BINARY count patterns
MAINDEC-00-P2G2-PT 1/23.68 ones and zeros test tape
MAINDEC-11-D9HA-PB 12/8/71 General test program
MAINDEC-11-D1AA-PB 3/30/70 Basic address test (up)
MAINDEC-11-D1BA-PB 3/30/70 Basic address test (down)
MAINDEC-11-D1CA-PB 3/30/70 No dual address test
MAINDEC-11-D1HA-PB 3/30/70 core heating test
-
Blue tray #2: DEC test tapes
MAINDEC-11-D0AA-PB Test 1 BRANCH
MAINDEC-11-D0BA-PB Test 2 CON BRANCH
MAINDEC-11-D0CA-PB Test 3 UNARY
MAINDEC-11-D0DA-PB Test 4 UNARY & BINARY
MAINDEC-11-D0EA-PB Test 5 ROTATE SHIFT
MAINDEC-11-D0FA-PB Test 6 COMPARE
MAINDEC-11-D0GA-PB Test 7 COMPARE NOT
MAINDEC-11-D0HA-PB Test 8 MOVE
MAINDEC-11-D0IA-PB Test 9 BIC + BIT
MAINDEC-11-D0JA-PB Test 10 ADD
MAINDEC-11-D0KA-PB Test 11 SUBTRACT
MAINDEC-11-D0LA-PB Test 12 JMP
MAINDEC-11-D0MA-PB Test 13 JSR, RTS, RTI
MAINDEC-11-D0NA-PB Test 14 TRAP TEST
MAINDEC-11-D0OA-PB Test 15 COMBINED INSTRUCTION TEST
MAINDEC-11-D0QA-PB Test 17 SYSTEM EXERCISER W/CORE EXPANSION
MAINDEC-11-D0RA-PB PDP-11 POWER FAIL
-
Blue tray #3 tapes:
- DEC-11-YQPB-PA 6/4/70, FPP-11 V005A - 11 tapes, TAPE 1 through TAPE 11 inclusive
- DEC-11-YQPB-PB 6/4/70, FPP-11 V005A, S=NONE, RA=NONE (1 tape) - yellow tape, EDITOR 9/71/ver 4a
- yellow tape, ABS LOADER VEr SA
- black tape, ABS BINARY LOADER (5 tapes)
- black tape, ODT-11X V-6a
- black tape, DEC-11-Y2DA-PB DUMPAB-V0001A, 2 tapes

Blue tray #4 tapes:
DEC-11-Y1PA-PA 4/10/70 IOX V004A
DEC-11-Y1PA-Pb 4/10/70 IOX V004A
DEC-11-Y1PA-D0 DUMP TT V001A 11/15/69
DEC-11-Y2PA-D0 DUMP AB V001A 11/15/69
DEC-11-Y1PA-DB DUMP TT V001A 11/15/69
DEC-11-O1PA-PB ODT-11 V004A 4/10/70
DEC-11-O2PB-PB ODT-11X V006A 1/4/71
DEC-11-L2PB-DO absolute loader V005A 4/28/70
DEC-11-E1PA-DB ED-11 V004A 4/24/70
DEC-11-C6PA-DB PDP-11 checkout package 6/2/70 (2 tapes)
DEC-11-ASXB-PB PAL-11A (8K) v006A 10/22/70
DEC-11-AJPB-PB PDP-11 BASIC V007A 10/22/70

Small box tied with twine: "Precision Systems", has Unibus cables.

Loose white binder:

PDP-11 Paper Tape Software Programming Handbook, DEC-11-OOPB-D Mar 1971
PDP-11 Unibus Interface Manual 2nd edition, DEC-11-H1AB-D Jan 1971

Small box, "PDP-11 Paper Tape Progr from NEWMAN 1977", has five numbered tape trays + one empty

tray 1: DEC FPP-11 tpabe and yellow rolled loader tapes
tray 2: DEC ODT-11, ODTX-11, PAL-11S tapes
tray 3: DEC FPP-11 and IOX tapes
tray 4: (no DEC lables on these tapes). LINKOB, LINK11, PALSYM, EDIT11, PAL11R, PALOB, LIBR11, ODT, 11R
tray 5: ??

low flat box with twine, "CUSTOM PRINTING CO"

Plessey Microsystems, PM-1116-B Core Memory manual (2 copies) 1977
Plessey Microsystems, PM-D11/SPC/ Mounting Panel manual
Plessey Microsystems, PM 1150/4 expansion chassis manual
one Unibus hex width core memory card
some dual width Unibus cards
some Unibus arbitration jumper cards

Brown box, tied with twine, "PDP-11 PROGRAMS"

several smalled rolled yellow papertapes
DEC handbooks:
-- Peripherals and Interfacing Handbook -- Processor Handbook
-- PDP-11 Handbook
PDP-11 BASIC Programming manual
two PDP-11 programming cards
Three blue paper tape trays:
--BASIC, IOX, ED, DUMP, PAL, Exerciser and Core test tapes, 1968-1971
--similar to or duplicates of other such tapes.

Brown box, low and long and flat, "PDP-11 Manuals from NEWMAN":

the following are long-form schematics and wire lists.
H720 manual
MM11-F core manual
KA-11 processor manual
11/20 System manual
KY11-A Programming Console Manual
DL11-W manual
conventions manual
Engineering drawings: MM11-E core, KY11-a, MM11-F, H720 power supply
Engineering drawings: Wire lists, KL-11, DL-11
KL11 Teletype Control
Field Maintenance prints, MP00196 & DL11
teletype 33 wiring

White box, low and flat, with lid. "spare group" manuals, has list inside

Similar set of manuals to "brown box...manuals from NEWMAN". Duplicates of some of those manuals.

Black-painted power supply. Also white box with another power supply.

Milk carton with binders in it

The white plastic milk carton with DEC materials as previously photographed with the 11/20 collection is probably NOT part of this 11/20 system.

blue binder: docs for some PDP-11 tapes:
-- Execisors and diagnotics, RSX-11M beginners guide
-- Micro PDP-11 Systems Owner's Manual
-- OMMI 800 (TI) 820 KSR manual
cloth binder:
-- TSV05 tape drive manual
-- DHV-11 manual
-- 11/73 controller User's Manual
-- micro PDP-11 manual

Contact info

This 11/20 system is discussed on on another Web page. Look there for contact information.

Copyright © 2008 Herb Johnson