first steps towards brand-specific color schemes

c64/kernal/init/e5a0.setup_vicii.s

@@ -44,12 +44,23 @@ setup_vicii:
 	lda #$0F
 	sta VIC_IRQ                        // clear all interrupts
 
-	// We use a different colour scheme of white text on all blue
+	// We use a different colour scheme of white text on all blue by default,
+	// but brand-specific color scheme can also be enabled
+
+#if CONFIG_COLORS_BRAND && CONFIG_BRAND_ULTIMATE_64
+
+	lda #$00
+	sta VIC_EXTCOL
+	sta VIC_BGCOL0
+
+#else
 
 	lda #$06
 	sta VIC_EXTCOL
 	sta VIC_BGCOL0
 
+#endif
+
 	// Setup default I/O devices
 
 	jmp clrchn_reset