;;
;; 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:
	rts