An interesting application of a PLA is conversion from the old, obsolete punched cards character codes to ASCII codes. The standard punched cards that were so pop- ular with computers in the past had 12 rows and 80 columns where holes could be punched. Each column corresponded to one character. so each character had a 12-bit code. However, only 96 characters were actually used. Consider an application that reads punched cards and converts the character codes to ASCII. a. Describe a PLA implementation of this application. b. Can this problem be solved with a ROM? Explain.

An interesting application of a PLA is conversion from the old, obsolete punched cards character codes to ASCII codes. The standard punched cards that were so pop- ular with computers in the past had 12 rows and 80 columns where holes could be punched. Each column corresponded to one character. so each character had a 12-bit code. However, only 96 characters were actually used. Consider an application that reads punched cards and converts the character codes to ASCII. a. Describe a PLA implementation of this application. b. Can this problem be solved with a ROM? Explain.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

An interesting application of a PLA is conversion from the old, obsolete punched
cards character codes to ASCII codes. The standard punched cards that were so pop-
ular with computers in the past had 12 rows and 80 columns where holes could be
punched. Each column corresponded to one character. so each character had a 12-bit
code. However, only 96 characters were actually used. Consider an application that
reads punched cards and converts the character codes to ASCII.
a. Describe a PLA implementation of this application.
b. Can this problem be solved with a ROM? Explain.

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