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  1. Proceedings of the 8th annual workshop on Microprogramming (MICRO 8)
  2. Design of a microprogrammed lexical microprocessor
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On balancing hardware-firmware for designing a fault-tolerant computers' series
A Control Word Model for detecting conflicts between microprograms
The design of a system for the synthesis of correct microprograms
An algorithm for control memory minimization
Design of a microprogrammed lexical microprocessor
Bell Labs microcode for the IBM 360/67
Significance, benefits and pitfalls of microprogramming (Panel Session)
Placement of microinstructions in a two-dimensional address space
A versatile microprogram sequencer
Am2900 Bipolar Microprocessor family
A powerful microprogram control unit - the 6700
A microinstruction sequencer and language package for structured microprogramming
A control strategy for small computer systems
Fitting processors to the needs of a General Purpose Array (EGPA)

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Design of a microprogrammed lexical microprocessor

Content Provider ACM Digital Library
Author Chu, Yaohan
Abstract A lexical processor accepts a string of characters and delivers a string of symbols. This paper presents the design of a vertically microprogrammed processor, specially for lexical processing of a subset of Algol. The design includes the processor organization, the microprogram control organization, and the algorithm for the microsubroutines. This microprogrammed lexical processor could be implemented as a microprocessor in a multi-microprocessor system for high-level languages. The advent of microprocessors in 1971 has created a new era in computer technology. Since then, there are over 20 microprocessors that have become available, and there are numerous applications that have been made possible by these microprocessors. However, these microprocessors are essentially arithmetic processors. As a result, conventional software such as compilers, assemblers, linkage editors and loaders are required. The advancement in semiconductor technology has not been equally matched by the advancement of computer architecture and computer languages. In order to make better use of microprocessors, it is highly desirable that the layers of software be simplified or eliminated, and that high-level languages be designed with both the technology and the users in the proper perspective. This paper presents the design of a lexical processor, which is vertically microprogrammed for easier programming. This processor could be implemented as a microprocessor to be a member of a multi-microprocessor system for high-level languages.
Starting Page 26
Ending Page 39
Page Count 14
File Format PDF
DOI 10.1145/800148.804858
Language English
Publisher Association for Computing Machinery (ACM)
Publisher Date 1975-09-21
Publisher Place New York
Access Restriction Subscribed
Content Type Text
Resource Type Article
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