started work on color palette support

src/aliases/,aliases_config.s

@@ -237,6 +237,14 @@
 }
 
 
+; Check that screen settings are correct
+
+!ifndef CONFIG_MB_M65 {
+	!ifdef CONFIG_VIC_PALETTE { !error "CONFIG_VIC_PALETTE is only possible for MEGA65 motherboard" }
+}
+!ifdef CONFIG_MB_MEGA65 {
+	!ifndef CONFIG_VIC_PALETTE { !error "CONFIG_VIC_PALETTE not specified" }
+}
 
 ; Check that internal DOS configuration is correct
 

src/aliases/,aliases_hardware_m65.s

@@ -27,6 +27,14 @@
 
 	!addr VIC_CHARPTR     = $D068 ; 3 bytes  - pointer to start of character generator
 
+	!addr VIC_PALSEL      = $D070 ;          - palette selection register
+
+	; Palette memory areas
+
+	!addr PALETTE_R       = $D100
+	!addr PALETTE_G       = $D200
+	!addr PALETTE_B       = $D300
+
 	; Keyboard
 
 	!addr C65_EXTKEYS_PR  = $D607