int serial_iec_open(unsigned int unit, unsigned int secondary,
const char *name, unsigned int length)
{
unsigned int i;
serial_iec_bus_open(unit, (BYTE)secondary, serial_iec_set_st);
for (i = 0; i < length; i++) {
serial_iec_bus_write(unit, (BYTE)secondary, name[i], serial_iec_set_st);
}
serial_iec_bus_unlisten(unit, (BYTE)secondary, serial_iec_set_st);
return 0;
}
int serial_iec_write(unsigned int unit, unsigned int secondary, BYTE data)
{
if (talk) {
serial_iec_bus_untalk(unit, (BYTE)secondary, serial_iec_set_st);
talk = 0;
}
if (!listen) {
serial_iec_bus_listen(unit | 0x20, (BYTE)secondary, serial_iec_set_st);
listen = 1;
}
serial_iec_bus_write(unit, (BYTE)secondary, data, serial_iec_set_st);
return serial_iec_st;
}
/* Send one byte on the serial bus. */
int serial_trap_send(void)
{
BYTE data;
if (serial_truedrive && ((TrapDevice & 0x0f) != 4) && ((TrapDevice & 0x0f) != 5)) {
return 0;
}
data = mem_read(BSOUR); /* BSOUR - character for serial bus */
serial_iec_bus_write(TrapDevice, TrapSecondary, data, serial_set_st);
MOS6510_REGS_SET_CARRY(&maincpu_regs, 0);
MOS6510_REGS_SET_INTERRUPT(&maincpu_regs, 0);
return 1;
}