;; Flush the IEC output buffer (if not empty) - send byte with EOI
;;
;; Preserves .X, .Y and .A registers

iec_tx_flush:

	pha
	lda C3PO
	beq +
	sec ; send it with EOI
	jsr iec_tx_byte ; send the command regardless of the status
*
	pla
	rts