PDP-7 Simulator Configuration

The PDP-7, introduced in 1965, was DEC's third 18-bit computer system. Both faster and less expensive than the PDP-1, the PDP-7 maintained upward compatibility from the PDP-4 but introduced many new options, including extended memory, extended arithmetic capability, and a crude form of memory protection. The PDP-7 featured DEC's first mass storage operating system (DECsys, based on DECtapes). It was also the development system for the first versions of UNIX.

Photographs (courtesy of Digital Equipment Corporation):

Option Description Capacity
CPU and memory           PDP-7 4KW - 32KW
CPU options Type 177 EAE, extended arithmetic element        
Type 148 memory extension control
Console Type 649 KSR-33 Teletype
Paper tape Type 444 paper tape reader
Type 75 paper tape punch
Real time clock integral
Line printer Type 647B line printer (sixbit ASCII)
DECtape Type 550/555 DECtape 148KW
Drum Type 24 serial drum 131KW

Updated 21-Apr-2003 by Bob Supnik (bob AT supnik DOT org - anti-spam encoded)