U80701
Encyclopedia
The U80701 was a 32-bit microprocessor
developed from 1986-1990 in the German Democratic Republic. It was manufactured by VEB Mikroelektronik "Karl Marx" Erfurt
(MME) in NMOS
technology and encased in a CQFP-68 package.
The U80701 was developed by reverse engineering
the MicroVAX 78032
microprocessor of the Digital Equipment Corporation
(DEC). It should be used in the Robotron
K 1820 minicomputer
- a clone of DEC's MicroVAX
II.
The U80700 system includes the following chips:
Microprocessor
A microprocessor incorporates the functions of a computer's central processing unit on a single integrated circuit, or at most a few integrated circuits. It is a multipurpose, programmable device that accepts digital data as input, processes it according to instructions stored in its memory, and...
developed from 1986-1990 in the German Democratic Republic. It was manufactured by VEB Mikroelektronik "Karl Marx" Erfurt
Erfurt
Erfurt is the capital city of Thuringia and the main city nearest to the geographical centre of Germany, located 100 km SW of Leipzig, 150 km N of Nuremberg and 180 km SE of Hannover. Erfurt Airport can be reached by plane via Munich. It lies in the southern part of the Thuringian...
(MME) in NMOS
NMOS logic
N-type metal-oxide-semiconductor logic uses n-type metal-oxide-semiconductor field effect transistors to implement logic gates and other digital circuits...
technology and encased in a CQFP-68 package.
The U80701 was developed by reverse engineering
Reverse engineering
Reverse engineering is the process of discovering the technological principles of a device, object, or system through analysis of its structure, function, and operation...
the MicroVAX 78032
MicroVAX 78032
The MicroVAX 78032 is a microprocessor developed and fabricated by Digital Equipment Corporation that implemented a subset of the VAX instruction set architecture . The 78032 was used exclusively in DEC's VAX-based systems, starting with the MicroVAX II in 1985...
microprocessor of the Digital Equipment Corporation
Digital Equipment Corporation
Digital Equipment Corporation was a major American company in the computer industry and a leading vendor of computer systems, software and peripherals from the 1960s to the 1990s...
(DEC). It should be used in the Robotron
Robotron
VEB Kombinat Robotron was the biggest East German electronics manufacturer. It was based in Dresden and employed 68,000 people . It produced personal computers, SM EVM minicomputers, the ESER mainframe computers, several computer peripherals as well as home computers, radios and television...
K 1820 minicomputer
Minicomputer
A minicomputer is a class of multi-user computers that lies in the middle range of the computing spectrum, in between the largest multi-user systems and the smallest single-user systems...
- a clone of DEC's MicroVAX
MicroVAX
The MicroVAX was a family of low-end minicomputers developed and manufactured by Digital Equipment Corporation . The first model, the MicroVAX I, was introduced in 1984...
II.
The U80700 system includes the following chips:
- U80701: CPU (DC333)
- U80703: FPU (DC337)
- U80707: Console interface/controller DLART (DC319)
- U80709: CPU interface gate arrayGate arrayA gate array or uncommitted logic array is an approach to the design and manufacture of application-specific integrated circuits...
(DC379) - U80711: Q22-Bus interface gate array (DC380)
