Listing 9. Pseudo-Serial Port Implementation in launcher.c

#include "runtime.h"

static int my_outb (void *opaque, uint16_t addr, uint8_t data)
{
    if (addr == IO_PORT_PSEUDO_SERIAL)
        if (isprint(data) || data == '\n')
            putchar(data);
        else
            putchar('.');
    else
        printf("outb: %x, %d\n", addr, data);
    fflush (NULL);

    return 0;
}