At ieee1284_ops.c, function parport_ieee1284_write_compat() is used to
send data when compatible mode is on.
At first it initializes the interface by asserting nInit and SelectIn low.
After that it waits until the peripheral's nBusy is high (the device is
unsigned char mask = (PARPORT_STATUS_ERROR
unsigned char val = (PARPORT_STATUS_ERROR
if (!parport_wait_peripheral (port, mask, val))
/* Skip the loop */
Why did it wait? Shouldn't it wait until nBusy is low??
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