Artifact Details

Title

PDP-11/20

Catalog Number

XD140.80A

Type

Physical object

Date

1969

Manufacturer

Digital Equipment Corporation (DEC)

Place Manufactured

U.S.

Identifying Numbers

Model number PDP 11/20
Serial number A: 00121

Description

Original TCM Boston label copy for a PDP-11 is as follows: The PDP-11 16,384 word (16-bits/word) planar structured core memory was introduced in 1975. The cycle time was 1. 5 microseconds and the access time, .75 microseconds. Comparing the various core memory systems: Computer Time Memory Size Whirlwind 1953 32 x 32 x 17 PDP-1 1962 64 x 64 x 18 PDP-11 1976 128 x 128 x 17 Computer Physical Size Cubic Feet Whirlwind 3' x 3' x 6' 54 PDP-1 1.5' x 1.5 x 2' 4.5 PDP- 11 15" x 8" x 1" .07

Category

Digital Computer: minicomputer

Credit

Gift of Roger Cady

Lot Number

XD140.80A-B
 

Related Records

XD140.80B PDP-11/20 Backplane array with PCBs