DEC PDP-11/23

Digital Equipment 11/23

The PDP 11/23 is a Q-Bus based 16 bit minicomputer manufactured by Digital Equipment Corporation. It was introduced in 1979 and is the successor of the PDP 11/03. It has a F-11 Microprocessor CPU, memory management and floating point instructions. It supports a maximum of 4 MBytes of memory.

This 11/23 was donated by Max Levy and is housed in a BA11-SA Q-Bus Chassis. A Data System Design 88-D30 chassis housing an 8" floppy and a hard drive is installed in the top of the DEC 1/2 rack. It was used to create data for the PDP-9.

The system contains the following boards:

Slot# Module# Option Description

1 M8186 KDF11-AC 11/23 CPU

2 M8059KC MSV11-LK 128-Kword MOS RAM, single voltage

3 M7941 DRV11 16-bit parallel line unit

4 M7941 DRV11 16-bit parallel line unit

5 M7941 DRV11 16-bit parallel line unit

6 ? DSD Disk Controller

7 H-11-2 ?

8 M8043 DLVJ1-M 4-Line Asynchronous Interface

9 H-15-5 Serial