20 lines
509 B
C
20 lines
509 B
C
unsigned char port_byte_in(unsigned short port) {
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unsigned char result;
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asm("in %%dx, %%al":"=a"(result):"d"(port));
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return result;
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}
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void port_byte_out(unsigned short port,unsigned char data) {
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asm("out %%al, %%dx":: "a"(data),"d"(port));
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}
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unsigned short port_word_in(unsigned short port) {
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unsigned short result;
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asm("in %%dx, %%ax":"=a"(result):"d"(port));
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return result;
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}
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void port_word_out(unsigned short port,unsigned short data) {
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asm("out %%ax, %%dx":: "a" (data), "d" (port));
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}
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