Retro68/gcc/newlib/libc/sys/sysnec810/write.c
Wolfgang Thaller d464252791 re-add newlib
2017-04-11 23:13:36 +02:00

37 lines
598 B
C

static volatile char *data = (char *)(0x20);
static volatile char *control = (char *)(0x24);
extern void _outb (volatile char*, unsigned char);
extern unsigned char _inb (volatile char*);
static unsigned char
read_scc_reg (unsigned char n)
{
_outb (control, n);
return _inb(control);
}
static void write_scc_data (unsigned char n)
{
_outb (data, n);
}
int
_write (int dev, void *buf, unsigned int len)
{
int i;
char *string = (char*)buf;
for (i = 0; i < len; i++)
{
int j;
for (j = 0 ; j < 5000; j++)
;
write_scc_data (string[i]);
}
return len;
}