Return to "Visible Storage"

*** Please note: This website (comp-hist) was completed before I found out about Wikipedia in 2002.
Since then I have added material occasionally.
Items are certainly not complete, and may be inaccurate.
Your information, comments, corrections, etc. are eagerly requested.
Send e-mail to Ed Thelen. Please include the URL under discussion. Thank you ***


Manufacturer DEC - Digital Equipment Corporation
Identification,ID PDP-9
Date of first manufacture1968
Number produced -
Estimated price or cost-
location in museum -
donor -

Contents of this page:



The PDP-1 was the first of the DEC 18 bit computer series, consisting of PDP-1, PDP-4, PDP-7, PDP-9, PDP-15.

see Architecture at PDP-1.

Instruction List, Page 1, 2

Special features
from Max Burnet
[This] is a hardware bootstrap loader for the PDP-9. Made by Tennecomp with a 19 inch rack form factor. It has a large black motor, which is activated by pressing the button on the front panel. The motor rotates a studded drum, 18 studs wide, and 60 positions long, using 53 of them. Like one of those music boxes.

The connector on the back of the unit would have been cabled into the PDP-9 (I presume) to pretend it is a "fast" switch register. I don't have any doco on the unit or know where it plugged in.

I was given it about 20 years ago by CSC Aust who had a PDP-9, and I believe it was in use. Would sure beat toggling in fifty three 18 bit words.

Max Burnet
Director Burnet Antique Computer Knowhow (BACK) Pty Ltd
Address   138 Boundary Rd., Pennant Hills NSW
Postal       PO Box 847  Pennant Hills NSW 2120 Australia
Phone      02 9484 6772 (diverts to mobile)
Mobile      0412 124 006

Historical Notes
see Timeline at PDP-1.

This Specimen

Interesting Web Sites

Other information

If you have comments or suggestions, Send e-mail to Ed Thelen

Go to Antique Computer home page
Go to Visual Storage page
Go to top

Updated February 6, 2002