SC/MP Development System

 Home > Browse Our Collection > Computers > National Semiconductor > SC/MP Development System

This is a National Semiconductor Simple Cost Effective Microprocessor System (SC/MP). This is a single-board microcomputer commercial development system.
Original Price: $499 - Original Date: 1976

Our Model number ISP-8P 301 NE.

Single-chip 8-bit microprocessor (ISP-8A/500)
Low cost microprocessor that has been designed to operate easily in multi-microprocessor configurations.
Most microprocessors are designed to always operate as bus master in any microcomputer system. SC/MP, in contrast, has the bus interface logic of a support device. it does not assume that it has any more right to a system bus than any other device. Bus request acknowledge logic coupled with bus access priority logic makes SC/MP the slave microprocessor of choice in any multi-microprocessor application.
Simple-to-use Cost-effective MicroProcessor
Silicon gate, P-channel Isoplanar LSI technology
Designed to fill the gap between four-bit CPUs (4004, 4040) and eight-bit microprocessors, the SC/MP features a 12-bit address bus, interfacing directly to 4 K bytes of standard memory. +5 V and -7 V volts power supply. Providing CMOS compatibility.
SC/MP is much slower than CPUs in N-Channel MOS technology. The simplest instruction takes five microcycles, each 2 us long – making the SC/MP about as fast as the 8008. Nevertheless, SC/MP should be attractive in industrial controllers in which speed is not critical.
SC/MP is a direct descendant of PACE.
Information from

Our model was very kindly donated by Mike Voss together with documentation and manuals.

Manufacturer: National Semiconductor
Date: 1976

Comment on This Page

SC/MP Development System Manuals:

Item Manufacturer Date
SC/MP Programming and Assembler Manual National Semiconductor Feb 1976
SC/MP Keyboard Kit - User's Manual National Semiconductor Dec 1976
SC/MP Processor Applications Handbook (MK14) National Semiconductors 1977
SC/MP Microprocessor Assembly Language Programming Manual National Semiconductor Jan 1977

Magazines RELATED to SC/MP Development System in our Library

Item Manufacturer Date
Personal Computer World - September 1979 Sep 1979

Other Systems Related To SC/MP Development System:

Item Manufacturer Date
SC/MP Introkit National Semiconductor 1976

This exhibit has a reference ID of CH4623. Please quote this reference ID in any communication with the Centre for Computing History.


SC/MP Development System

  Book Archive   [1]

Click on the Image(s) For Detail


Related Video

Steve Furber Talk - Acorn World - 13-09-2009
Steve Furber Talk - Acorn World - 13-09-2009

Help support the museum by buying from the museum shop

View all items

Founding Sponsors
redgate Google ARM Real VNC Microsoft Research
Heritage Lottery Funded
Heritage Lottery Fund
Accredited Museum