DIO_SCMAX
for (scode = 0; scode < DIO_SCMAX; scode++) {
for (scode = 0; scode < DIO_SCMAX; ++scode) {
else if (scode > DIO_SCMAX || scode < 0)
if (hp300_uart_scode < 0 || hp300_uart_scode > DIO_SCMAX)