//
// Official Kernal routine, described in:
//
// - [RG64] C64 Programmer's Reference Guide   - page 293/294
// - [CM64] Compute's Mapping the Commodore 64 - page 231/232
// - IEC reference at http://www.zimmers.net/anonftp/pub/cbm/programming/serial-bus.pdf
//
// CPU registers that has to be preserved (see [RG64]): none
//

SAVE:
	STUB_IMPLEMENTATION()