National COPS I
Developer	National Semiconductor
Manufacturer	National Semiconductor
Type	microcontrollers
Production	1976
ISA	COPS
Word size	4 bit 0.5 octets 1 nibbles
Technology	pMOS
Clock	340 kHz-400 kHz
Package	DIP24, DIP28

The COPS I (Controller Oriented Processor System I) (originally just COPS) was a family of 4-bit microcontrollers developed by National Semiconductor. COPS, as it was originally called, was released to the market in 1976. It was manufactured in pMOS technology. A year later, National introduced the COPS II, an nMOS (and later CMOS) versions of those chips.

Members

The MM5781+MM5782 solution allowed for more complex designs whereas the MM5799 served as a single-chip solution, albeit more limited. The MM57140 was an even more advanced chip incorporating the keyboard input and display driver.

Part	Description
MM5781	Control Unit (16k ROM)
MM5129	Control Unit (32k ROM)
MM5782	Memory and processor
MM5799	Single-chip (MM5781+MM5782)
MM57140	Single-chip; 630x8-bit ROM, 55x4-bit RAM
MM5785	RAM interface (between MM5782 and MM5799)
MM5788	printer interface (for Seiko 102, 104, 210, 220, 101T, 310, 320, et al)
MM57126	shift register

Design

This section is empty; you can help add the missing info by editing this page.

ISA

This section is empty; you can help add the missing info by editing this page.

Documents

• National COPS Databook, 1977

This article is still a stub and needs your attention. You can help improve this article by editing this page and adding the missing information.