PAL/NTSC display is now optional

c64/kernal/assets/kernal_messages.s

@@ -12,6 +12,11 @@
 .label __MSG_KERNAL_FROM_HEX      = __kernal_message_from_hex      - __kernal_messages_start
 .label __MSG_KERNAL_TO_HEX        = __kernal_message_to_hex        - __kernal_messages_start
 
+#if CONFIG_BANNER_PAL_NTSC
+.label __MSG_KERNAL_PAL           = __kernal_message_pal           - __kernal_messages_start
+.label __MSG_KERNAL_NTSC          = __kernal_message_ntsc          - __kernal_messages_start
+#endif
+
 
 __kernal_messages_start:
 
@@ -42,3 +47,15 @@ __kernal_message_from_hex:
 __kernal_message_to_hex:
 	.text " TO "
 	.byte $80 + $24 // end of string mark + '$'
+
+#if CONFIG_BANNER_PAL_NTSC
+
+__kernal_message_pal:
+	.text "PAL,"
+	.byte $80 + $20 // end of string mark + space
+
+__kernal_message_ntsc:
+	.text "NTSC,"
+	.byte $80 + $20 // end of string mark + space
+
+#endif // CONFIG_BANNER_PAL_NTSC

c64/kernal/print/print_pal_ntsc.s

@@ -0,0 +1,17 @@
+
+//
+// Print video system on startup banner
+//
+
+#if CONFIG_BANNER_PAL_NTSC
+
+print_pal_ntsc:
+
+	ldx #__MSG_KERNAL_NTSC
+	lda TVSFLG
+	beq !+
+	ldx #__MSG_KERNAL_PAL
+!:
+	jmp print_kernal_message
+
+#endif // CONFIG_BANNER_PAL_NTSC