A REAL-TIME APPLICATION LAYER ON DOS

Abstract

A neat tLme sy,stem ti- one that haz to nepond to exten-na2 and tintenna2 4tLma-L within a speci6ic time con4bna-Lnt. The aim o3 this the.--L4 ti4 to design and LmpLement a .606t neat-time appLticaition 2ayeh bon IBMIcompatibte PC. The enhancement ob .exnek ti4 done a-s a £ayen anound DOS, the widely used operating 4ystem 6oh mticnocomputen4. The extended frennei w-Ui enhance the capabLLtittie4 o6 DOS to ,support neat time apptication4. It tib Lmptemented u4Lng C. The developed tayex pnov-de4 nece44any support to the uzen, and only, the application speci6ic 6eatune4 ob heat time apptica Lon need to be £mpLemented. Tht4 wLU reduce the burden of the appLtication puognammen. The timptementation £4 ne4thictcd to -Lng4c application with mu tipLe pnoce,szez. The matin moduLe4 ane : schedutet, pnoce44 communication and 4ynchnontization, and cntenhupt handLeh. The schcdutet L4 timpLemented a4 a staltic one and -cheduLe4 the pnoce46e4 ba4ed on puLotitie4 a44tigned by the u4en, 6untheu cLa44ti6tied by deadLLne time4. P/Loce44 com- munication and 4ynchnonization iz heaitized u-6ting me44age paz4Lng technique4. A4ynchnonou4 communication type ti4 sup-pouted. To ve&i6y the eb6ectivene44 and -LLL, mate itz wonting, a trace through the 4o6twa u- £4 given, con4-Ldenting a 4pecL e. example.