compilation fix

c64/kernal/ciout.s

@@ -8,8 +8,7 @@ ciout:
 	bne ciout_send_byte
 
 	;; Nothing to send - set buffer as valid, store byte there
-	inc
+	inc C3PO
-	sta C3PO
 
 	;; Clear carry flag to indicate success
 	clc

c64/kernal/iec_turnaround_to_talk.s

@@ -0,0 +1,12 @@
+	;; 	According to http://www.zimmers.net/anonftp/pub/cbm/programming/serial-bus.pdf
+	;;  	pages 7--8.
+	;; See also https://www.pagetable.com/?p=1135, https://github.com/mist64/cbmbus_doc
+
+iec_turnaround_to_talk:
+
+	;; XXX implement this
+	
+	clc
+	rts
+
+

c64/kernal/load.s

@@ -198,7 +198,8 @@ load_done:
 	lda #$0D
 	jsr JCHROUT
 *
-	;; Close file on drive
+	;; Close file on drive - start by turnaround to talker
+	jsr iec_turnaround_to_talk
 	
 	;; Command drive to stop talking and to close the file
 	jsr untlk