implemented SETMSG routine, LOAD command uses it

c64/basic/,aliases.s

@@ -61,8 +61,7 @@
 	.alias LDTND $98 ; number of entries in LAT / FAT / SAT tables
 	.alias DFLTN $99
 	.alias input_device_number DFLTN
-	; bit 6 = error messages, bit 7 = control messages
-	.alias kernal_message_control_flags $9d
+	.alias MSGFLG $9D ; bit 6 = error messages, bit 7 = control message
 	.alias jiffy_clock_24bits $a0
 	.alias cassette_buffer_bytes_used $A6
 	.alias load_or_scroll_temp_pointer $AC

c64/basic/cmd_load.s

@@ -11,6 +11,15 @@ cmd_load:
 	;; middle of a program. For safety, we do.
 	jsr basic_do_clr
 	
+	;; Setup Kernal to print control messages or not
+	lda #$80 ; display control messages and omit error messages
+	ldx basic_current_line_number+1
+	cpx #$FF
+	beq +
+	lda #$00 ; direct mode - don't display anything
+*
+	jsr $FF90 ; SETMSG
+	
 	;; XXX temporary, to set valid device number
 	lda #$08
 	sta current_device_number