;;
;; 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:

	;; Due to OPEN/CLOSE/TKSA/SECOND command encoding (see https://www.pagetable.com/?p=1031),
	;; allowed channels are 0-15; report error if out of range
	cmp #$10
	bcc + 
	jmp kernalerror_DEVICE_NOT_FOUND ; XXX find a better error message for wrong channel (create new one?)
*
	ora #$60

	jmp common_open_close_unlsn_second