//
// Official Kernal routine, described in:
//
// - [RG64] C64 Programmer's Reference Guide   - page 296
// - [CM64] Compute's Mapping the Commodore 64 - page 223/224
// - https://www.pagetable.com/?p=1031, , https://github.com/mist64/cbmbus_doc
//
// CPU registers that has to be preserved (see [RG64]): .X, .Y
//


SECOND:

#if CONFIG_IEC

	// Due to OPEN/CLOSE/TKSA/SECOND command encoding, allowed channels are 0-15; it is the caller
	// responsibility, hovewer, to provide value ORed with $60
	// - https://www.lemon64.com/forum/viewtopic.php?t=57694&sid=531ba3592bcffadef2ac8b9162f2e529
	// - https://www.pagetable.com/?p=1031 (Kernal API description)

	// XXX consider checking whether value is in range (contrary to original ROM implementation)

	jmp common_open_close_unlsn_second

#else

	jmp kernalerror_ILLEGAL_DEVICE_NUMBER

#endif