How to resolve the algorithm Memory layout of a data structure step by step in the ALGOL 68 programming language

Published on 12 May 2024 09:40 PM
#Algol 68

How to resolve the algorithm Memory layout of a data structure step by step in the ALGOL 68 programming language

Table of Contents

Problem Statement

It is often useful to control the memory layout of fields in a data structure to match an interface control definition, or to interface with hardware. Define a data structure matching the RS-232 Plug Definition. Use the 9-pin definition for brevity.

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Step by Step solution about How to resolve the algorithm Memory layout of a data structure step by step in the ALGOL 68 programming language

Source code in the algol programming language

MODE RSTWOTHREETWO = BITS;
INT ofs = bits width - 9;
INT 
   lwb rs232           = ofs + 1,
   carrier detect      = ofs + 1,
   received data       = ofs + 2,
   transmitted data    = ofs + 3,
   data terminal ready = ofs + 4,
   signal ground       = ofs + 5,
   data set ready      = ofs + 6,
   request to send     = ofs + 7,
   clear to send       = ofs + 8,
   ring indicator      = ofs + 9,
   upb rs232           = ofs + 9;
 
RSTWOTHREETWO rs232 bits := 2r10000000; # up to bits width, OR #
print(("received data: ",received data ELEM rs232bits, new line));

rs232 bits := bits pack((FALSE, TRUE, FALSE, FALSE, FALSE, FALSE, FALSE, FALSE, FALSE));
print(("received data: ",received data ELEM rs232bits, new line))

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