?? lpt.c
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#include <sys/io.h>#define LPT1 0x378 /* Endere?o base da porta paralela*/unsigned char initLPT(){ char status; // Libera acesso para os endere?os: 0x378, 0x379, 0x37A if( ioperm(LPT1, 3, 1) ) return 0; // Desliga todos os pinos do Registro de Dados outb(0, LPT1); // Habilita a porta LPT bi-direcional status = inb(LPT1+2) & 32; outb(status, LPT1+2); return 1;}unsigned char in(char bit) { return (char)((inb(LPT1+1) & bit) != 0) ? 1 : 0;}void out(char byte) { outb(byte, LPT1);}
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