Consistently refer to CGB, not GBC (#491)

constants/hardware_constants.asm

@@ -1,6 +1,8 @@
-; From http://nocash.emubase.de/pandocs.htm.
+; Reference documents:
+; https://gbdev.io/pandocs/
+; https://github.com/gbdev/hardware.inc
 
-DEF GBC EQU $11
+DEF CGB EQU $11
 
 ; MBC1
 DEF MBC1SRamEnable      EQU $0000

engine/gfx/palettes.asm

@@ -396,11 +396,11 @@ LoadSGB:
 	ret nc
 	ld a, 1
 	ld [wOnSGB], a
-	ld a, [wGBC]
+	ld a, [wOnCGB]
 	and a
-	jr z, .notGBC
+	jr z, .notCGB
 	ret
-.notGBC
+.notCGB
 	di
 	call PrepareSuperNintendoVRAMTransfer
 	ei
@@ -563,21 +563,21 @@ Wait7000:
 	ret
 
 SendSGBPackets:
-	ld a, [wGBC]
+	ld a, [wOnCGB]
 	and a
-	jr z, .notGBC
+	jr z, .notCGB
 	push de
-	call InitGBCPalettes
+	call InitCGBPalettes
 	pop hl
 	call EmptyFunc3
 	ret
-.notGBC
+.notCGB
 	push de
 	call SendSGBPacket
 	pop hl
 	jp SendSGBPacket
 
-InitGBCPalettes:
+InitCGBPalettes:
 	ld a, $80 ; index 0 with auto-increment
 	ldh [rBGPI], a
 	inc hl

home/start.asm

@@ -1,10 +1,10 @@
 _Start::
-	cp GBC
-	jr z, .gbc
+	cp CGB
+	jr z, .cgb
 	xor a
 	jr .ok
-.gbc
+.cgb
 	ld a, FALSE
 .ok
-	ld [wGBC], a
+	ld [wOnCGB], a
 	jp Init

ram/wram.asm

@@ -1029,7 +1029,8 @@ wScriptedNPCWalkCounter:: db
 
 	ds 1
 
-wGBC:: db
+; always 0 since full CGB support was not implemented
+wOnCGB:: db
 
 ; if running on SGB, it's 1, else it's 0
 wOnSGB:: db