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[Aurora:~/aurora/dev] chris% gcc -c -I ./include misc.c
misc.c: In function `outb':
misc.c:12: error: inconsistent operand constraints in an `asm'
[Aurora:~/aurora/dev] chris% 

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inline void outb(unsigned int port,unsigned char value)  // Output a byte to a port
{
    asm volatile ("outb %%al,%%dx"::"d" (port), "a" (value));
};

inline void outw(unsigned int port,unsigned int value)  // Output a word to a port
{
    asm volatile ("outw %%ax,%%dx"::"d" (port), "a" (value));
};

inline unsigned char inb(unsigned short port)
{
   unsigned char ret_val;

   asm volatile("inb %w1,%b0"
      : "=a"(ret_val)
      : "d"(port));
   return ret_val;
};

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[Aurora:~/aurora/dev] chris% gcc -v
Reading specs from /usr/libexec/gcc/darwin/ppc/3.3/specs
Thread model: posix
gcc version 3.3 20030304 (Apple Computer, Inc. build 1495)