show the most important compiled-in features on startup screen

c64/kernal/assets/kernal_messages.s

@@ -25,6 +25,9 @@
 .label __MSG_KERNAL_PANIC_ROM_MISMATCH = __msg_kernalpanic_rom_mismatch - __msg_kernal_first
 #endif
 
+#if CONFIG_SHOW_FEATURES
+.label __MSG_KERNAL_FEATURES           = __msg_kernalfeatures           - __msg_kernal_first
+#endif
 
 __msg_kernal_first:
 
@@ -59,12 +62,14 @@ __msg_kernalto_hex:
 #if CONFIG_SHOW_PAL_NTSC
 
 __msg_kernalpal:
-	.text "PAL,"
-	.byte $80 + $20 // end of string mark + space
+	.text "PAL"
+	.byte $0D
+	.byte $80 + $0D // end of string mark + return
 
 __msg_kernalntsc:
-	.text "NTSC,"
-	.byte $80 + $20 // end of string mark + space
+	.text "NTSC"
+	.byte $0D
+	.byte $80 + $0D // end of string mark + return
 
 #endif // CONFIG_SHOW_PAL_NTSC
 
@@ -79,3 +84,11 @@ __msg_kernalpanic_rom_mismatch:
 	.byte $80 + $48 // end of string mark + 'H'
 
 #endif // CONFIG_PANIC_SCREEN
+
+#if CONFIG_SHOW_FEATURES
+
+__msg_kernalfeatures:
+	.text BUILD_FEATURES_STR()
+	.byte $80 + $0D // end of string mark + return
+
+#endif // CONFIG_SHOW_FEATURES

c64/kernal/iec/iec_jiffydos.s

@@ -72,10 +72,10 @@ jiffydos_restore_sprites:
 
 .function SAME_PAGE_CHECK(label_1, label_2)
 {
-#if !PASS_SIZETEST
-	return (label_1 - label_1 % 256) == (label_2 - label_2 % 256)
+#if PASS_SIZETEST
+	.return (label_1 - label_1 % 256) == (label_2 - label_2 % 256)
 #else
-	return true
+	.return true
 #endif
 }
 

c64/kernal/print/print_features.s

@@ -0,0 +1,14 @@
+
+//
+// Print configured features on startup banner
+//
+
+#if CONFIG_SHOW_FEATURES
+
+print_features:
+
+	ldx #__MSG_KERNAL_FEATURES
+!:
+	jmp print_kernal_message
+
+#endif // CONFIG_SHOW_FEATURES