Use rgbgfx instead of gfx.py

and use pokered's Makefile structure

14 files changed, 444 insertions, 252 deletions

diff --git a/src/audio/music1.asm b/src/audio/music1.asm
index a3a6e9e..03c55b9 100644
--- a/src/audio/music1.asm
+++ b/src/audio/music1.asm
@@ -106,13 +106,13 @@ Func_f406f: ; f406f (3d:406f)
 
 Music1_Init: ; f407d (3d:407d)
 	xor a
-	ld [rNR52], a
+	ldh [rNR52], a
 	ld a, $80
-	ld [rNR52], a
+	ldh [rNR52], a
 	ld a, $77
-	ld [rNR50], a
+	ldh [rNR50], a
 	ld a, $ff
-	ld [rNR51], a
+	ldh [rNR51], a
 	ld a, $3d
 	ld [wCurSongBank], a
 	ld a, $80
@@ -216,34 +216,34 @@ Music1_StopAllChannels: ; f414b (3d:414b)
 	bit 0, d
 	jr nz, .stop_channel_2
 	ld a, $8
-	ld [rNR12], a
+	ldh [rNR12], a
 	swap a
-	ld [rNR14], a
+	ldh [rNR14], a
 .stop_channel_2
 	xor a
 	ld [wMusicIsPlaying + 1], a
 	bit 1, d
 	jr nz, .stop_channel_4
 	ld a, $8
-	ld [rNR22], a
+	ldh [rNR22], a
 	swap a
-	ld [rNR24], a
+	ldh [rNR24], a
 .stop_channel_4
 	xor a
 	ld [wMusicIsPlaying + 3], a
 	bit 3, d
 	jr nz, .stop_channel_3
 	ld a, $8
-	ld [rNR42], a
+	ldh [rNR42], a
 	swap a
-	ld [rNR44], a
+	ldh [rNR44], a
 .stop_channel_3
 	xor a
 	ld [wMusicIsPlaying + 2], a
 	bit 2, d
 	jr nz, .done
 	ld a, $0
-	ld [rNR32], a
+	ldh [rNR32], a
 .done
 	ret
 
@@ -429,9 +429,9 @@ Music1_UpdateChannel1: ; f42a5 (3d:42a5)
 	bit 0, a
 	jr nz, .asm_f4309
 	ld a, $8
-	ld [rNR12], a
+	ldh [rNR12], a
 	swap a
-	ld [rNR14], a
+	ldh [rNR14], a
 .asm_f4309
 	ret
 
@@ -482,9 +482,9 @@ Music1_UpdateChannel2: ; f430a (3d:430a)
 	bit 1, a
 	jr nz, .asm_f436e
 	ld a, $8
-	ld [rNR22], a
+	ldh [rNR22], a
 	swap a
-	ld [rNR24], a
+	ldh [rNR24], a
 .asm_f436e
 	ret
 
@@ -506,7 +506,7 @@ Music1_UpdateChannel3: ; f436f (3d:436f)
 	cp $1
 	jr z, .asm_f4398
 	ld a, [wMusicE9 + 2]
-	ld [rNR32], a
+	ldh [rNR32], a
 .asm_f4398
 	ld a, [wddbb + 2]
 	dec a
@@ -531,9 +531,9 @@ Music1_UpdateChannel3: ; f436f (3d:436f)
 	bit 2, a
 	jr nz, .asm_f43cd
 	ld a, $0
-	ld [rNR32], a
+	ldh [rNR32], a
 	ld a, $80
-	ld [rNR34], a
+	ldh [rNR34], a
 .asm_f43cd
 	ret
 
@@ -569,9 +569,9 @@ Music1_UpdateChannel4: ; f43ce (3d:43ce)
 	xor a
 	ld [wddef], a
 	ld a, $8
-	ld [rNR42], a
+	ldh [rNR42], a
 	swap a
-	ld [rNR44], a
+	ldh [rNR44], a
 .asm_f4413
 	ret
 
@@ -1167,19 +1167,19 @@ Func_f4714: ; f4714 (3d:4714)
 	cp $80
 	jr z, .asm_f4733
 	ld a, [wMusicVolume]
-	ld [rNR12], a
+	ldh [rNR12], a
 	ld d, $80
 .asm_f4733
 	ld [hl], $2
 	ld a, $8
-	ld [rNR10], a
+	ldh [rNR10], a
 	ld a, [wMusicDuty1]
-	ld [rNR11], a
+	ldh [rNR11], a
 	ld a, [wMusicCh1CurPitch]
-	ld [rNR13], a
+	ldh [rNR13], a
 	ld a, [wMusicCh1CurOctave]
 	or d
-	ld [rNR14], a
+	ldh [rNR14], a
 .asm_f4749
 	ret
 .asm_f474a
@@ -1206,17 +1206,17 @@ Func_f475a: ; f475a (3d:475a)
 	cp $80
 	jr z, .asm_f4779
 	ld a, [wMusicVolume + 1]
-	ld [rNR22], a
+	ldh [rNR22], a
 	ld d, $80
 .asm_f4779
 	ld [hl], $2
 	ld a, [wMusicDuty2]
-	ld [rNR21], a
+	ldh [rNR21], a
 	ld a, [wMusicCh2CurPitch]
-	ld [rNR23], a
+	ldh [rNR23], a
 	ld a, [wMusicCh2CurOctave]
 	or d
-	ld [rNR24], a
+	ldh [rNR24], a
 .asm_f478b
 	ret
 .asm_f478c
@@ -1239,7 +1239,7 @@ Func_f479c: ; f479c (3d:479c)
 	or a
 	jr z, .no_wave_change
 	xor a
-	ld [rNR30], a
+	ldh [rNR30], a
 	call Music1_LoadWaveInstrument
 	ld d, $80
 .no_wave_change
@@ -1251,28 +1251,28 @@ Func_f479c: ; f479c (3d:479c)
 	cp $80
 	jr z, .asm_f47cc
 	ld a, [wMusicVolume + 2]
-	ld [rNR32], a
+	ldh [rNR32], a
 	xor a
-	ld [rNR30], a
+	ldh [rNR30], a
 	ld d, $80
 .asm_f47cc
 	ld [hl], $2
 	xor a
-	ld [rNR31], a
+	ldh [rNR31], a
 	ld a, [wMusicCh3CurPitch]
-	ld [rNR33], a
+	ldh [rNR33], a
 	ld a, $80
-	ld [rNR30], a
+	ldh [rNR30], a
 	ld a, [wMusicCh3CurOctave]
 	or d
-	ld [rNR34], a
+	ldh [rNR34], a
 .asm_f47e0
 	ret
 .asm_f47e1
 	ld hl, wMusicTie
 	ld [hl], $0
 	xor a
-	ld [rNR30], a
+	ldh [rNR30], a
 	ret
 
 Music1_LoadWaveInstrument: ; f479c (3d:47ea)
@@ -1349,7 +1349,7 @@ Func_f4839: ; f4839 (3d:4839)
 	jr nz, .asm_f4853
 	jr asm_f482a
 .asm_f4853
-	ld [rNR43], a
+	ldh [rNR43], a
 	inc de
 	ld a, d
 	ld [hld], a
@@ -1368,7 +1368,7 @@ Func_f485a: ; f485a (3d:485a)
 
 Func_f4866: ; f4866 (3d:4866)
 	ld a, [wMusicPanning]
-	ld [rNR50], a
+	ldh [rNR50], a
 	ld a, [wdd8c]
 	or a
 	ld hl, wMusicDC
@@ -1397,7 +1397,7 @@ Func_f4866: ; f4866 (3d:4866)
 	swap e
 	or e
 	and d
-	ld [rNR51], a
+	ldh [rNR51], a
 	ret
 
 Music1_UpdateVibrato: ; f4898 (3d:4898)
@@ -1495,13 +1495,13 @@ Func_f490b: ; f490b (3d:490b)
 	bit 0, a
 	jr nz, .done
 	ld a, e
-	ld [rNR13], a
-	ld a, [rNR11]
+	ldh [rNR13], a
+	ldh a, [rNR11]
 	and $c0
-	ld [rNR11], a
+	ldh [rNR11], a
 	ld a, d
 	and $3f
-	ld [rNR14], a
+	ldh [rNR14], a
 	ret
 .not_channel_1
 	cp $1
@@ -1513,12 +1513,12 @@ Func_f490b: ; f490b (3d:490b)
 	bit 1, a
 	jr nz, .done
 	ld a, e
-	ld [rNR23], a
-	ld a, [rNR21]
+	ldh [rNR23], a
+	ldh a, [rNR21]
 	and $c0
-	ld [rNR21], a
+	ldh [rNR21], a
 	ld a, d
-	ld [rNR24], a
+	ldh [rNR24], a
 	ret
 .not_channel_2
 	cp $2
@@ -1530,11 +1530,11 @@ Func_f490b: ; f490b (3d:490b)
 	bit 2, a
 	jr nz, .done
 	ld a, e
-	ld [rNR33], a
+	ldh [rNR33], a
 	xor a
-	ld [rNR31], a
+	ldh [rNR31], a
 	ld a, d
-	ld [rNR34], a
+	ldh [rNR34], a
 .done
 	ret
 
@@ -1567,28 +1567,28 @@ Func_f4980: ; f4980 (3d:4980)
 	bit 0, d
 	jr nz, .asm_f4990
 	ld a, $8
-	ld [rNR12], a
+	ldh [rNR12], a
 	swap a
-	ld [rNR14], a
+	ldh [rNR14], a
 .asm_f4990
 	bit 1, d
 	jr nz, .asm_f499c
 	swap a
-	ld [rNR22], a
+	ldh [rNR22], a
 	swap a
-	ld [rNR24], a
+	ldh [rNR24], a
 .asm_f499c
 	bit 3, d
 	jr nz, .asm_f49a8
 	swap a
-	ld [rNR42], a
+	ldh [rNR42], a
 	swap a
-	ld [rNR44], a
+	ldh [rNR44], a
 .asm_f49a8
 	bit 2, d
 	jr nz, .asm_f49b0
 	ld a, $0
-	ld [rNR32], a
+	ldh [rNR32], a
 .asm_f49b0
 	ret
 
diff --git a/src/audio/music2.asm b/src/audio/music2.asm
index e13389e..4a8178e 100644
--- a/src/audio/music2.asm
+++ b/src/audio/music2.asm
@@ -106,13 +106,13 @@ Func_f806f: ; f806f (3e:406f)
 
 Music2_Init: ; f807d (3e:407d)
 	xor a
-	ld [rNR52], a
+	ldh [rNR52], a
 	ld a, $80
-	ld [rNR52], a
+	ldh [rNR52], a
 	ld a, $77
-	ld [rNR50], a
+	ldh [rNR50], a
 	ld a, $ff
-	ld [rNR51], a
+	ldh [rNR51], a
 	ld a, $3d
 	ld [wCurSongBank], a
 	ld a, $80
@@ -216,34 +216,34 @@ Music2_StopAllChannels: ; f814b (3e:414b)
 	bit 0, d
 	jr nz, .stop_channel_2
 	ld a, $8
-	ld [rNR12], a
+	ldh [rNR12], a
 	swap a
-	ld [rNR14], a
+	ldh [rNR14], a
 .stop_channel_2
 	xor a
 	ld [wMusicIsPlaying + 1], a
 	bit 1, d
 	jr nz, .stop_channel_4
 	ld a, $8
-	ld [rNR22], a
+	ldh [rNR22], a
 	swap a
-	ld [rNR24], a
+	ldh [rNR24], a
 .stop_channel_4
 	xor a
 	ld [wMusicIsPlaying + 3], a
 	bit 3, d
 	jr nz, .stop_channel_3
 	ld a, $8
-	ld [rNR42], a
+	ldh [rNR42], a
 	swap a
-	ld [rNR44], a
+	ldh [rNR44], a
 .stop_channel_3
 	xor a
 	ld [wMusicIsPlaying + 2], a
 	bit 2, d
 	jr nz, .done
 	ld a, $0
-	ld [rNR32], a
+	ldh [rNR32], a
 .done
 	ret
 
@@ -429,9 +429,9 @@ Music2_UpdateChannel1: ; f82a5 (3e:42a5)
 	bit 0, a
 	jr nz, .asm_f8309
 	ld a, $8
-	ld [rNR12], a
+	ldh [rNR12], a
 	swap a
-	ld [rNR14], a
+	ldh [rNR14], a
 .asm_f8309
 	ret
 
@@ -482,9 +482,9 @@ Music2_UpdateChannel2: ; f830a (3e:430a)
 	bit 1, a
 	jr nz, .asm_f836e
 	ld a, $8
-	ld [rNR22], a
+	ldh [rNR22], a
 	swap a
-	ld [rNR24], a
+	ldh [rNR24], a
 .asm_f836e
 	ret
 
@@ -506,7 +506,7 @@ Music2_UpdateChannel3: ; f836f (3e:436f)
 	cp $1
 	jr z, .asm_f8398
 	ld a, [wMusicE9 + 2]
-	ld [rNR32], a
+	ldh [rNR32], a
 .asm_f8398
 	ld a, [wddbb + 2]
 	dec a
@@ -531,9 +531,9 @@ Music2_UpdateChannel3: ; f836f (3e:436f)
 	bit 2, a
 	jr nz, .asm_f83cd
 	ld a, $0
-	ld [rNR32], a
+	ldh [rNR32], a
 	ld a, $80
-	ld [rNR34], a
+	ldh [rNR34], a
 .asm_f83cd
 	ret
 
@@ -569,9 +569,9 @@ Music2_UpdateChannel4: ; f83ce (3e:43ce)
 	xor a
 	ld [wddef], a
 	ld a, $8
-	ld [rNR42], a
+	ldh [rNR42], a
 	swap a
-	ld [rNR44], a
+	ldh [rNR44], a
 .asm_f8413
 	ret
 
@@ -1167,19 +1167,19 @@ Func_f8714: ; f8714 (3e:4714)
 	cp $80
 	jr z, .asm_f8733
 	ld a, [wMusicVolume]
-	ld [rNR12], a
+	ldh [rNR12], a
 	ld d, $80
 .asm_f8733
 	ld [hl], $2
 	ld a, $8
-	ld [rNR10], a
+	ldh [rNR10], a
 	ld a, [wMusicDuty1]
-	ld [rNR11], a
+	ldh [rNR11], a
 	ld a, [wMusicCh1CurPitch]
-	ld [rNR13], a
+	ldh [rNR13], a
 	ld a, [wMusicCh1CurOctave]
 	or d
-	ld [rNR14], a
+	ldh [rNR14], a
 .asm_f8749
 	ret
 .asm_f874a
@@ -1206,17 +1206,17 @@ Func_f875a: ; f875a (3e:475a)
 	cp $80
 	jr z, .asm_f8779
 	ld a, [wMusicVolume + 1]
-	ld [rNR22], a
+	ldh [rNR22], a
 	ld d, $80
 .asm_f8779
 	ld [hl], $2
 	ld a, [wMusicDuty2]
-	ld [rNR21], a
+	ldh [rNR21], a
 	ld a, [wMusicCh2CurPitch]
-	ld [rNR23], a
+	ldh [rNR23], a
 	ld a, [wMusicCh2CurOctave]
 	or d
-	ld [rNR24], a
+	ldh [rNR24], a
 .asm_f878b
 	ret
 .asm_f878c
@@ -1239,7 +1239,7 @@ Func_f879c: ; f879c (3e:479c)
 	or a
 	jr z, .no_wave_change
 	xor a
-	ld [rNR30], a
+	ldh [rNR30], a
 	call Music2_LoadWaveInstrument
 	ld d, $80
 .no_wave_change
@@ -1251,28 +1251,28 @@ Func_f879c: ; f879c (3e:479c)
 	cp $80
 	jr z, .asm_f87cc
 	ld a, [wMusicVolume + 2]
-	ld [rNR32], a
+	ldh [rNR32], a
 	xor a
-	ld [rNR30], a
+	ldh [rNR30], a
 	ld d, $80
 .asm_f87cc
 	ld [hl], $2
 	xor a
-	ld [rNR31], a
+	ldh [rNR31], a
 	ld a, [wMusicCh3CurPitch]
-	ld [rNR33], a
+	ldh [rNR33], a
 	ld a, $80
-	ld [rNR30], a
+	ldh [rNR30], a
 	ld a, [wMusicCh3CurOctave]
 	or d
-	ld [rNR34], a
+	ldh [rNR34], a
 .asm_f87e0
 	ret
 .asm_f87e1
 	ld hl, wMusicTie
 	ld [hl], $0
 	xor a
-	ld [rNR30], a
+	ldh [rNR30], a
 	ret
 
 Music2_LoadWaveInstrument: ; f879c (3e:47ea)
@@ -1349,7 +1349,7 @@ Func_f8839: ; f8839 (3e:4839)
 	jr nz, .asm_f8853
 	jr asm_f882a
 .asm_f8853
-	ld [rNR43], a
+	ldh [rNR43], a
 	inc de
 	ld a, d
 	ld [hld], a
@@ -1368,7 +1368,7 @@ Func_f885a: ; f885a (3e:485a)
 
 Func_f8866: ; f8866 (3e:4866)
 	ld a, [wMusicPanning]
-	ld [rNR50], a
+	ldh [rNR50], a
 	ld a, [wdd8c]
 	or a
 	ld hl, wMusicDC
@@ -1397,7 +1397,7 @@ Func_f8866: ; f8866 (3e:4866)
 	swap e
 	or e
 	and d
-	ld [rNR51], a
+	ldh [rNR51], a
 	ret
 
 Func_f8898: ; f8898 (3e:4898)
@@ -1495,13 +1495,13 @@ Func_f890b: ; f890b (3e:490b)
 	bit 0, a
 	jr nz, .done
 	ld a, e
-	ld [rNR13], a
-	ld a, [rNR11]
+	ldh [rNR13], a
+	ldh a, [rNR11]
 	and $c0
-	ld [rNR11], a
+	ldh [rNR11], a
 	ld a, d
 	and $3f
-	ld [rNR14], a
+	ldh [rNR14], a
 	ret
 .not_channel_1
 	cp $1
@@ -1513,12 +1513,12 @@ Func_f890b: ; f890b (3e:490b)
 	bit 1, a
 	jr nz, .done
 	ld a, e
-	ld [rNR23], a
-	ld a, [rNR21]
+	ldh [rNR23], a
+	ldh a, [rNR21]
 	and $c0
-	ld [rNR21], a
+	ldh [rNR21], a
 	ld a, d
-	ld [rNR24], a
+	ldh [rNR24], a
 	ret
 .not_channel_2
 	cp $2
@@ -1530,11 +1530,11 @@ Func_f890b: ; f890b (3e:490b)
 	bit 2, a
 	jr nz, .done
 	ld a, e
-	ld [rNR33], a
+	ldh [rNR33], a
 	xor a
-	ld [rNR31], a
+	ldh [rNR31], a
 	ld a, d
-	ld [rNR34], a
+	ldh [rNR34], a
 .done
 	ret
 
@@ -1567,28 +1567,28 @@ Func_f8980: ; f8980 (3e:4980)
 	bit 0, d
 	jr nz, .asm_f8990
 	ld a, $8
-	ld [rNR12], a
+	ldh [rNR12], a
 	swap a
-	ld [rNR14], a
+	ldh [rNR14], a
 .asm_f8990
 	bit 1, d
 	jr nz, .asm_f899c
 	swap a
-	ld [rNR22], a
+	ldh [rNR22], a
 	swap a
-	ld [rNR24], a
+	ldh [rNR24], a
 .asm_f899c
 	bit 3, d
 	jr nz, .asm_f89a8
 	swap a
-	ld [rNR42], a
+	ldh [rNR42], a
 	swap a
-	ld [rNR44], a
+	ldh [rNR44], a
 .asm_f89a8
 	bit 2, d
 	jr nz, .asm_f89b0
 	ld a, $0
-	ld [rNR32], a
+	ldh [rNR32], a
 .asm_f89b0
 	ret
 
diff --git a/src/audio/sfx.asm b/src/audio/sfx.asm
index 6b3e2bc..c682191 100644
--- a/src/audio/sfx.asm
+++ b/src/audio/sfx.asm
@@ -400,7 +400,7 @@ SFX_7: ; fc202 (3f:4202)
 	ld h, [hl]
 	ld l, a
 	ld a, $0
-	ld [rNR30], a
+	ldh [rNR30], a
 	ld b, d
 	ld de, $ff30
 .asm_fc215
@@ -414,7 +414,7 @@ SFX_7: ; fc202 (3f:4202)
 	ld a, $1
 	ld [wMusicWaveChange], a
 	ld a, $80
-	ld [rNR30], a
+	ldh [rNR30], a
 	ld b, $0
 	pop hl
 	jp Func_fc094
@@ -481,14 +481,14 @@ Func_fc26c: ; fc26c (3f:426c)
 
 Func_fc279: ; fc279 (3f:4279)
 	ld a, $8
-	ld a, [rNR12]
-	ld a, [rNR22]
-	ld a, [rNR32]
-	ld a, [rNR42]
+	ldh a, [rNR12]
+	ldh a, [rNR22]
+	ldh a, [rNR32]
+	ldh a, [rNR42]
 	ld a, $80
-	ld a, [rNR14]
-	ld a, [rNR24]
-	ld a, [rNR44]
+	ldh a, [rNR14]
+	ldh a, [rNR24]
+	ldh a, [rNR44]
 	xor a
 	ld [wdd8c], a
 	ret
diff --git a/src/engine/bank04.asm b/src/engine/bank04.asm
index a1e504f..8fb4d29 100644
--- a/src/engine/bank04.asm
+++ b/src/engine/bank04.asm
@@ -13,8 +13,8 @@ Func_10000: ; 10000 (4:4000)
 	bit LCDC_ENABLE_F, a
 	jr nz, .asm_10025
 	xor a
-	ld [rSCX], a
-	ld [rSCY], a
+	ldh [rSCX], a
+	ldh [rSCY], a
 
 .asm_10025
 	call Func_1288c
diff --git a/src/engine/bank1c.asm b/src/engine/bank1c.asm
index cff0a96..b8ac4fb 100644
--- a/src/engine/bank1c.asm
+++ b/src/engine/bank1c.asm
@@ -176,13 +176,13 @@ Func_70136: ; 70136 (1c:4136)
 	or LCDC_BGON
 	ld [wLCDC], a
 	ld a, %11100100
-	ld [rBGP], a
+	ldh [rBGP], a
 	call SetBGP
 	xor a
 	ldh [hSCX], a
-	ld [rSCX], a
+	ldh [rSCX], a
 	ldh [hSCY], a
-	ld [rSCY], a
+	ldh [rSCY], a
 	pop de
 	pop bc
 	pop hl
diff --git a/src/engine/home.asm b/src/engine/home.asm
index ff887fd..f33ec2f 100644
--- a/src/engine/home.asm
+++ b/src/engine/home.asm
@@ -39,8 +39,8 @@ Start: ; 0150 (0:0150)
 	ld sp, $fffe
 	push af
 	xor a
-	ld [rIF], a
-	ld [rIE], a
+	ldh [rIF], a
+	ldh [rIE], a
 	call ZeroRAM
 	ld a, $1
 	call BankswitchROM
@@ -87,16 +87,16 @@ VBlankHandler: ; 019b (0:019b)
 .no_oam_copy
 	; flush scaling/windowing parameters
 	ldh a, [hSCX]
-	ld [rSCX], a
+	ldh [rSCX], a
 	ldh a, [hSCY]
-	ld [rSCY], a
+	ldh [rSCY], a
 	ldh a, [hWX]
-	ld [rWX], a
+	ldh [rWX], a
 	ldh a, [hWY]
-	ld [rWY], a
+	ldh [rWY], a
 	; flush LCDC
 	ld a, [wLCDC]
-	ld [rLCDC], a
+	ldh [rLCDC], a
 	ei
 	call wVBlankFunctionTrampoline
 	call FlushPalettesIfRequested
@@ -186,17 +186,17 @@ SetupTimer: ; 0241 (0:0241)
 	ld b, -68 ; Value for Normal Speed
 	call CheckForCGB
 	jr c, .set_timer
-	ld a, [rKEY1]
+	ldh a, [rKEY1]
 	and $80
 	jr z, .set_timer
 	ld b, $100 - 2 * 68 ; Value for CGB Double Speed
 .set_timer
 	ld a, b
-	ld [rTMA], a
+	ldh [rTMA], a
 	ld a, TAC_16384_HZ
-	ld [rTAC], a
+	ldh [rTAC], a
 	ld a, TAC_START | TAC_16384_HZ
-	ld [rTAC], a
+	ldh [rTAC], a
 	ret
 
 ; return carry if not CGB
@@ -231,36 +231,36 @@ EnableLCD: ; 0277 (0:0277)
 	ret nz               ; assert that LCD is off
 	or LCDC_ON           ;
 	ld [wLCDC], a        ;
-	ld [rLCDC], a        ; turn LCD on
+	ldh [rLCDC], a       ; turn LCD on
 	ld a, FLUSH_ALL_PALS
 	ld [wFlushPaletteFlags], a
 	ret
 
 ; wait for vblank, then turn LCD off
 DisableLCD: ; 028a (0:028a)
-	ld a, [rLCDC]        ;
+	ldh a, [rLCDC]       ;
 	bit LCDC_ENABLE_F, a ;
 	ret z                ; assert that LCD is on
-	ld a, [rIE]
+	ldh a, [rIE]
 	ld [wIE], a
 	res INT_VBLANK, a    ;
-	ld [rIE], a          ; disable vblank interrupt
+	ldh [rIE], a         ; disable vblank interrupt
 .wait_vblank
-	ld a, [rLY]          ;
+	ldh a, [rLY]         ;
 	cp LY_VBLANK         ;
 	jr nz, .wait_vblank  ; wait for vblank
-	ld a, [rLCDC]        ;
+	ldh a, [rLCDC]       ;
 	and LCDC_OFF         ;
-	ld [rLCDC], a        ;
+	ldh [rLCDC], a       ;
 	ld a, [wLCDC]        ;
 	and LCDC_OFF         ;
 	ld [wLCDC], a        ; turn LCD off
 	xor a
-	ld [rBGP], a
-	ld [rOBP0], a
-	ld [rOBP1], a
+	ldh [rBGP], a
+	ldh [rOBP0], a
+	ldh [rOBP1], a
 	ld a, [wIE]
-	ld [rIE], a
+	ldh [rIE], a
 	ret
 
 ; set OBJ size: 8x8
@@ -293,50 +293,50 @@ Set_WD_off: ; 02d4 (0:02d4)
 
 ; enable timer interrupt
 EnableInt_Timer: ; 02dd (0:02dd)
-	ld a, [rIE]
+	ldh a, [rIE]
 	or 1 << INT_TIMER
-	ld [rIE], a
+	ldh [rIE], a
 	ret
 
 ; enable vblank interrupt
 EnableInt_VBlank: ; 02e4 (0:02e4)
-	ld a, [rIE]
+	ldh a, [rIE]
 	or 1 << INT_VBLANK
-	ld [rIE], a
+	ldh [rIE], a
 	ret
 
 ; enable lcdc interrupt on hblank mode
 EnableInt_HBlank: ; 02eb (0:02eb)
-	ld a, [rSTAT]
+	ldh a, [rSTAT]
 	or 1 << STAT_MODE_HBLANK
-	ld [rSTAT], a
+	ldh [rSTAT], a
 	xor a
-	ld [rIF], a
-	ld a, [rIE]
+	ldh [rIF], a
+	ldh a, [rIE]
 	or 1 << INT_LCD_STAT
-	ld [rIE], a
+	ldh [rIE], a
 	ret
 
 ; disable lcdc interrupt and the hblank mode trigger
 DisableInt_HBlank: ; 02fb (0:02fb)
-	ld a, [rSTAT]
+	ldh a, [rSTAT]
 	and ~(1 << STAT_MODE_HBLANK)
-	ld [rSTAT], a
+	ldh [rSTAT], a
 	xor a
-	ld [rIF], a
-	ld a, [rIE]
+	ldh [rIF], a
+	ldh a, [rIE]
 	and ~(1 << INT_LCD_STAT)
-	ld [rIE], a
+	ldh [rIE], a
 	ret
 
 ; initialize scroll, window, and lcdc registers, set trampoline functions
 ; for the lcdc and vblank interrupts, latch clock data, and enable SRAM/RTC
 SetupRegisters: ; 030b (0:030b)
 	xor a
-	ld [rSCY], a
-	ld [rSCX], a
-	ld [rWY], a
-	ld [rWX], a
+	ldh [rSCY], a
+	ldh [rSCX], a
+	ldh [rWY], a
+	ldh [rWX], a
 	ld [wcab0], a
 	ld [wcab1], a
 	ld [wcab2], a
@@ -378,7 +378,7 @@ DetectConsole: ; 0349 (0:0349)
 	cp CONSOLE_CGB
 	ret nz
 	ld a, $01
-	ld [rSVBK], a
+	ldh [rSVBK], a
 	call SwitchToCGBDoubleSpeed
 	ret
 
@@ -386,10 +386,10 @@ DetectConsole: ; 0349 (0:0349)
 SetupPalettes: ; 036a (0:036a)
 	ld hl, wBGP
 	ld a, %11100100
-	ld [rBGP], a
+	ldh [rBGP], a
 	ld [hli], a ; wBGP
-	ld [rOBP0], a
-	ld [rOBP1], a
+	ldh [rOBP0], a
+	ldh [rOBP1], a
 	ld [hli], a ; wOBP0
 	ld [hl], a ; wOBP1
 	xor a
@@ -545,11 +545,11 @@ FlushPalettesIfRequested: ; 042d (0:042d)
 	; flush grayscale (non-CGB) palettes
 	ld hl, wBGP
 	ld a, [hli]
-	ld [rBGP], a
+	ldh [rBGP], a
 	ld a, [hli]
-	ld [rOBP0], a
+	ldh [rOBP0], a
 	ld a, [hl]
-	ld [rOBP1], a
+	ldh [rOBP1], a
 	ld a, [wConsole]
 	cp CONSOLE_CGB
 	jr z, .CGB
@@ -600,7 +600,7 @@ CopyCGBPalettes: ; 0467 (0:0467)
 	ld [$ff00+c], a
 	inc c
 .wait
-	ld a, [rSTAT]
+	ldh a, [rSTAT]
 	and 1 << STAT_BUSY ; wait until hblank or vblank
 	jr nz, .wait
 	ld a, [hl]
@@ -679,21 +679,21 @@ BCCoordToBGMap0Address: ; 04cf (0:04cf)
 ; the A + B + Start + Select combination resets the game
 ReadJoypad: ; 04de (0:04de)
 	ld a, JOY_BTNS_SELECT
-	ld [rJOYP], a
-	ld a, [rJOYP]
-	ld a, [rJOYP]
+	ldh [rJOYP], a
+	ldh a, [rJOYP]
+	ldh a, [rJOYP]
 	cpl
 	and JOY_INPUT_MASK
 	swap a
 	ld b, a ; buttons data
 	ld a, JOY_DPAD_SELECT
-	ld [rJOYP], a
-	ld a, [rJOYP]
-	ld a, [rJOYP]
-	ld a, [rJOYP]
-	ld a, [rJOYP]
-	ld a, [rJOYP]
-	ld a, [rJOYP]
+	ldh [rJOYP], a
+	ldh a, [rJOYP]
+	ldh a, [rJOYP]
+	ldh a, [rJOYP]
+	ldh a, [rJOYP]
+	ldh a, [rJOYP]
+	ldh a, [rJOYP]
 	cpl
 	and JOY_INPUT_MASK
 	or b
@@ -726,7 +726,7 @@ SaveButtonsHeld:
 	ld a, c
 	ldh [hKeysHeld], a
 	ld a, JOY_BTNS_SELECT | JOY_DPAD_SELECT
-	ld [rJOYP], a
+	ldh [rJOYP], a
 	ret
 
 ; clear joypad hmem data
@@ -824,7 +824,7 @@ CopyDMAFunction: ; 0593 (0:0593)
 ; CopyDMAFunction copies this function to hDMAFunction ($ff83)
 DMA: ; 05a1 (0:05a1)
 	ld a, HIGH(wOAM)
-	ld [rDMA], a
+	ldh [rDMA], a
 	ld a, $28
 .wait
 	dec a
@@ -1322,7 +1322,7 @@ BankswitchVRAM0: ; 07c5 (0:07c5)
 	push af
 	xor a
 	ldh [hBankVRAM], a
-	ld [rVBK], a
+	ldh [rVBK], a
 	pop af
 	ret
 
@@ -1331,14 +1331,14 @@ BankswitchVRAM1: ; 07cd (0:07cd)
 	push af
 	ld a, $1
 	ldh [hBankVRAM], a
-	ld [rVBK], a
+	ldh [rVBK], a
 	pop af
 	ret
 
 ; set current dest VRAM bank to a
 BankswitchVRAM: ; 07d6 (0:07d6)
 	ldh [hBankVRAM], a
-	ld [rVBK], a
+	ldh [rVBK], a
 	ret
 
 ; switch to CGB Normal Speed Mode if playing on CGB and current mode is Double Speed Mode
@@ -1361,20 +1361,20 @@ SwitchToCGBDoubleSpeed: ; 07e7 (0:07e7)
 
 ; switch between CGB Double Speed Mode and Normal Speed Mode
 CGBSpeedSwitch: ; 07f1 (0:07f1)
-	ld a, [rIE]
+	ldh a, [rIE]
 	push af
 	xor a
-	ld [rIE], a
+	ldh [rIE], a
 	set 0, [hl]
 	xor a
-	ld [rIF], a
-	ld [rIE], a
+	ldh [rIF], a
+	ldh [rIE], a
 	ld a, $30
-	ld [rJOYP], a
+	ldh [rJOYP], a
 	stop
 	call SetupTimer
 	pop af
-	ld [rIE], a
+	ldh [rIE], a
 	ret
 
 ; validate the saved data in SRAM
@@ -1983,30 +1983,30 @@ DetectSGB: ; 0b59 (0:0b59)
 	call Wait
 	ld hl, MltReq2Packet
 	call SendSGB
-	ld a, [rJOYP]
+	ldh a, [rJOYP]
 	and %11
 	cp SNES_JOYPAD1
 	jr nz, .sgb
 	ld a, P15
-	ld [rJOYP], a
-	ld a, [rJOYP]
-	ld a, [rJOYP]
+	ldh [rJOYP], a
+	ldh a, [rJOYP]
+	ldh a, [rJOYP]
 	ld a, P15 | P14
-	ld [rJOYP], a
+	ldh [rJOYP], a
 	ld a, P14
-	ld [rJOYP], a
-	ld a, [rJOYP]
-	ld a, [rJOYP]
-	ld a, [rJOYP]
-	ld a, [rJOYP]
-	ld a, [rJOYP]
-	ld a, [rJOYP]
+	ldh [rJOYP], a
+	ldh a, [rJOYP]
+	ldh a, [rJOYP]
+	ldh a, [rJOYP]
+	ldh a, [rJOYP]
+	ldh a, [rJOYP]
+	ldh a, [rJOYP]
 	ld a, P15 | P14
-	ld [rJOYP], a
-	ld a, [rJOYP]
-	ld a, [rJOYP]
-	ld a, [rJOYP]
-	ld a, [rJOYP]
+	ldh [rJOYP], a
+	ldh a, [rJOYP]
+	ldh a, [rJOYP]
+	ldh a, [rJOYP]
+	ldh a, [rJOYP]
 	and %11
 	cp SNES_JOYPAD1
 	jr nz, .sgb
@@ -2037,13 +2037,13 @@ Func_0bcb: ; 0bcb (0:0bcb)
 	di
 	push de
 .wait_vbalnk
-	ld a, [rLY]
+	ldh a, [rLY]
 	cp LY_VBLANK + 3
 	jr nz, .wait_vbalnk
 	ld a, LCDC_BGON | LCDC_OBJON | LCDC_WIN9C00
-	ld [rLCDC], a
+	ldh [rLCDC], a
 	ld a, %11100100
-	ld [rBGP], a
+	ldh [rBGP], a
 	ld de, v0Tiles1
 	ld bc, v0BGMap0 - v0Tiles1
 .tiles_loop
@@ -2069,7 +2069,7 @@ Func_0bcb: ; 0bcb (0:0bcb)
 	dec c
 	jr nz, .bgmap_outer_loop
 	ld a, LCDC_BGON | LCDC_OBJON | LCDC_WIN9C00 | LCDC_ON
-	ld [rLCDC], a
+	ldh [rLCDC], a
 	pop hl
 	call SendSGB
 	ei
@@ -2098,12 +2098,12 @@ HblankCopyDataHLtoDE: ; 0c19 (0:0c19)
 .loop
 	ei
 	di
-	ld a, [rSTAT]        ;
+	ldh a, [rSTAT]       ;
 	and STAT_LCDC_STATUS ;
 	jr nz, .loop         ; assert hblank
 	ld a, [hl]
 	ld [de], a
-	ld a, [rSTAT]        ;
+	ldh a, [rSTAT]       ;
 	and STAT_LCDC_STATUS ;
 	jr nz, .loop         ; assert still in hblank
 	ei
@@ -2120,12 +2120,12 @@ HblankCopyDataDEtoHL: ; 0c32 (0:0c32)
 .loop
 	ei
 	di
-	ld a, [rSTAT]        ;
+	ldh a, [rSTAT]       ;
 	and STAT_LCDC_STATUS ;
 	jr nz, .loop         ; assert hblank
 	ld a, [de]
 	ld [hl], a
-	ld a, [rSTAT]        ;
+	ldh a, [rSTAT]       ;
 	and STAT_LCDC_STATUS ;
 	jr nz, .loop         ; assert still in hblank
 	ei
@@ -2228,13 +2228,13 @@ SerialTimerHandler: ; 0c91 (0:0c91)
 	jr z, .check_for_timeout
 	ret
 .begin_transfer
-	ld a, [rSC]          ;
+	ldh a, [rSC]         ;
 	add a                ; make sure that no serial transfer is active
 	ret c                ;
 	ld a, SC_INTERNAL
-	ld [rSC], a          ; use internal clock
+	ldh [rSC], a         ; use internal clock
 	ld a, SC_START | SC_INTERNAL
-	ld [rSC], a          ; use internal clock, set transfer start flag
+	ldh [rSC], a         ; use internal clock, set transfer start flag
 	ret
 .check_for_timeout
 	; sets bit7 of [wSerialFlags] if the serial interrupt hasn't triggered
@@ -2273,11 +2273,11 @@ Func_0cc5: ; 0cc5 (0:0cc5)
 	ret
 .asm_cdc
 	ld a, $29
-	ld [rSB], a
+	ldh [rSB], a
 	ld a, SC_INTERNAL
-	ld [rSC], a
+	ldh [rSC], a
 	ld a, SC_START | SC_INTERNAL
-	ld [rSC], a
+	ldh [rSC], a
 .asm_ce8
 	ld a, [hl]
 	or a
@@ -2330,17 +2330,17 @@ SerialHandler: ; 0d26 (0:0d26)
 	or a                 ;
 	jr z, .asm_d55       ; skip ahead if [wSerialOp] zero
 	; send/receive a byte
-	ld a, [rSB]
+	ldh a, [rSB]
 	call SerialHandleRecv
 	call SerialHandleSend ; returns byte to actually send
 	push af
 .wait_for_completion
-	ld a, [rSC]
+	ldh a, [rSC]
 	add a
 	jr c, .wait_for_completion
 	pop af
 	; end send/receive
-	ld [rSB], a          ; prepare sending byte (from Func_0dc8?)
+	ldh [rSB], a         ; prepare sending byte (from Func_0dc8?)
 	ld a, [wSerialOp]
 	cp $29
 	jr z, .done          ; if [wSerialOp] != $29, use external clock
@@ -2348,16 +2348,16 @@ SerialHandler: ; 0d26 (0:0d26)
 .asm_d55
 	ld a, $1
 	ld [wSerialRecvCounter], a
-	ld a, [rSB]
+	ldh a, [rSB]
 	ld [wSerialRecvBuf], a
 	ld a, $ac
-	ld [rSB], a
+	ldh [rSB], a
 	ld a, [wSerialRecvBuf]
 	cp $12               ; if [wSerialRecvBuf] != $12, use external clock
 	jr z, .done          ; and prepare for next byte. either way, return
 .asm_d6a
 	ld a, SC_START | SC_EXTERNAL
-	ld [rSC], a          ; transfer start, use external clock
+	ldh [rSC], a         ; transfer start, use external clock
 .done
 	ld hl, wSerialCounter
 	inc [hl]
@@ -2592,25 +2592,25 @@ SerialExchangeBytes: ; 0e63 (0:0e63)
 Func_0e8e: ; 0e8e (0:0e8e)
 	call ClearSerialData
 	ld a, $12
-	ld [rSB], a          ; send $12
+	ldh [rSB], a         ; send $12
 	ld a, SC_START | SC_EXTERNAL
-	ld [rSC], a          ; use external clock, set transfer start flag
-	ld a, [rIF]
+	ldh [rSC], a         ; use external clock, set transfer start flag
+	ldh a, [rIF]
 	and ~(1 << INT_SERIAL)
-	ld [rIF], a          ; clear serial interrupt flag
-	ld a, [rIE]
+	ldh [rIF], a         ; clear serial interrupt flag
+	ldh a, [rIE]
 	or 1 << INT_SERIAL   ; enable serial interrupt
-	ld [rIE], a
+	ldh [rIE], a
 	ret
 
 ; disable serial interrupt, and clear rSB, rSC, and serial registers in WRAM
 ResetSerial: ; 0ea6 (0:0ea6)
-	ld a, [rIE]
+	ldh a, [rIE]
 	and ~(1 << INT_SERIAL)
-	ld [rIE], a
+	ldh [rIE], a
 	xor a
-	ld [rSB], a
-	ld [rSC], a
+	ldh [rSB], a
+	ldh [rSC], a
 ;	fallthrough
 
 ; zero serial registers in WRAM
@@ -9400,14 +9400,14 @@ Func_31e5: ; 31e5 (0:31e5)
 	jr Func_31e0
 
 Func_31ea: ; 31ea (0:31ea)
-	ld a, [rSB]
+	ldh a, [rSB]
 	ld [wce6e], a
 Func_31ef: ; 31ef (0:31ef)
 	xor a
 	jr Func_31e0
 
 Func_31f2: ; 31f2 (0:31f2)
-	ld a, [rSB]
+	ldh a, [rSB]
 	ld [wce6f], a
 	xor a
 	ld [wce63], a
@@ -9434,11 +9434,11 @@ Func_31fc: ; 31fc (0:31fc)
 ;	fallthrough
 
 Func_3212: ; 3212 (0:3212)
-	ld [rSB], a
+	ldh [rSB], a
 	ld a, SC_INTERNAL
-	ld [rSC], a
+	ldh [rSC], a
 	ld a, SC_START | SC_INTERNAL
-	ld [rSC], a
+	ldh [rSC], a
 	ret
 
 ; doubles the damage at de if swords dance or focus energy was used
@@ -11255,7 +11255,7 @@ CallBC: ; 3c46 (0:3c46)
 
 DoFrameIfLCDEnabled: ; 3c48 (0:3c48)
 	push af
-	ld a, [rLCDC]
+	ldh a, [rLCDC]
 	bit LCDC_ENABLE_F, a
 	jr z, .done
 	push bc
diff --git a/src/gfx/cards/grassenergy.8x6.png b/src/gfx/cards/grassenergy.8x6.png
index 2046bcb..5cc6b30 100644
--- a/src/gfx/cards/grassenergy.8x6.png
+++ b/src/gfx/cards/grassenergy.8x6.png
diff --git a/src/gfx/duel/cgb_symbols.t7.png b/src/gfx/duel/cgb_symbols.t7.png
index 578867f..ac0f54d 100644
--- a/src/gfx/duel/cgb_symbols.t7.png
+++ b/src/gfx/duel/cgb_symbols.t7.png
diff --git a/src/gfx/duel/dmg_sgb_symbols.t7.png b/src/gfx/duel/dmg_sgb_symbols.t7.png
index 10715db..91eede5 100644
--- a/src/gfx/duel/dmg_sgb_symbols.t7.png
+++ b/src/gfx/duel/dmg_sgb_symbols.t7.png
diff --git a/src/gfx/duel/other.t7.png b/src/gfx/duel/other.t7.png
index 796ecf7..d2aa1e9 100644
--- a/src/gfx/duel/other.t7.png
+++ b/src/gfx/duel/other.t7.png
diff --git a/src/gfx/fonts/full_width/4.t3.png b/src/gfx/fonts/full_width/4.t3.png
index 6ccef5d..c872a6d 100644
--- a/src/gfx/fonts/full_width/4.t3.png
+++ b/src/gfx/fonts/full_width/4.t3.png
diff --git a/src/gfx/fonts/symbols.png b/src/gfx/fonts/symbols.png
index 81afc3b..347001a 100644
--- a/src/gfx/fonts/symbols.png
+++ b/src/gfx/fonts/symbols.png
diff --git a/src/layout.link b/src/layout.link
new file mode 100644
index 0000000..49511eb
--- /dev/null
+++ b/src/layout.link
@@ -0,0 +1,180 @@
+ROM0
+	org $0000
+	"rst00"
+	org $0008
+	"rst08"
+	org $0010
+	"rst10"
+	org $0018
+	"rst18"
+	org $0020
+	"rst20"
+	org $0028
+	"rst28"
+	org $0030
+	"rst30"
+	org $0038
+	"rst38"
+	org $0040
+	"vblank"
+	org $0048
+	"lcdc"
+	org $0050
+	"timer"
+	org $0058
+	"serial"
+	org $0060
+	"joypad"
+	org $0100
+	"romheader"
+	org $0150
+	"start"
+ROMX $01
+	"Bank 1"
+ROMX $02
+	"Bank 2"
+ROMX $03
+	"Bank 3"
+ROMX $04
+	"Bank 4"
+ROMX $06
+	"Bank 6"
+ROMX $07
+	"Bank 7"
+	"Booster Packs"
+ROMX $08
+	"Bank 8"
+ROMX $09
+	"Empty Bank 9"
+ROMX $0a
+	"Empty Bank A"
+ROMX $0b
+	"Effect Functions"
+ROMX $0c
+	"Decks"
+	"Cards"
+ROMX $0d
+	"Text 1"
+ROMX $0e
+	"Text 2"
+ROMX $0f
+	"Text 3"
+ROMX $10
+	"Text 4"
+ROMX $11
+	"Text 5"
+ROMX $12
+	"Text 6"
+ROMX $13
+	"Text 7"
+ROMX $14
+	"Text 8"
+ROMX $15
+	"Text 9"
+ROMX $16
+	"Text 10"
+ROMX $17
+	"Text 11"
+ROMX $18
+	"Text 12"
+ROMX $19
+	"Text 13"
+ROMX $1a
+	"Empty Bank 1A"
+ROMX $1b
+	"Empty Bank 1B"
+ROMX $1c
+	"Bank 1C"
+ROMX $1d
+	"Gfx 1"
+ROMX $1e
+	"Gfx 2"
+ROMX $1f
+	"Empty Bank 1F"
+ROMX $20
+	"Bank 20"
+ROMX $21
+	"Gfx 3"
+ROMX $22
+	"Gfx 4"
+ROMX $23
+	"Gfx 5"
+ROMX $24
+	"Gfx 6"
+ROMX $25
+	"Gfx 7"
+ROMX $26
+	"Gfx 8"
+ROMX $27
+	"Gfx 9"
+ROMX $28
+	"Gfx 10"
+ROMX $29
+	"Gfx 11"
+ROMX $2a
+	"Gfx 12"
+ROMX $2b
+	"Gfx 13"
+ROMX $2c
+	"Gfx 14"
+ROMX $2d
+	"Gfx 15"
+ROMX $2e
+	"Gfx 16"
+ROMX $2f
+	"Empty Bank 2F"
+ROMX $30
+	"Empty Bank 30"
+ROMX $31
+	"Card Gfx 1"
+ROMX $32
+	"Card Gfx 2"
+ROMX $33
+	"Card Gfx 3"
+ROMX $34
+	"Card Gfx 4"
+ROMX $35
+	"Card Gfx 5"
+ROMX $36
+	"Card Gfx 6"
+ROMX $37
+	"Card Gfx 7"
+ROMX $38
+	"Card Gfx 8"
+ROMX $39
+	"Card Gfx 9"
+ROMX $3a
+	"Card Gfx 10"
+ROMX $3b
+	"Card Gfx 11"
+ROMX $3c
+	"Empty Bank 3C"
+ROMX $3d
+	"Audio 1"
+ROMX $3e
+	"Audio 2"
+ROMX $3f
+	"Audio 3"
+WRAM0
+	"WRAM0"
+	"WRAM0 Duels 1"
+	"WRAM0 Text Engine"
+	"WRAM0 1"
+	"WRAM0 Serial Transfer"
+	"WRAM0 Duels 2"
+	"WRAM0 2"
+WRAMX 1
+	"WRAM1"
+	"WRAM1 Audio"
+VRAM $00
+	"VRAM0"
+VRAM $01
+	"VRAM1"
+SRAM $00
+	"SRAM0"
+SRAM $01
+	"SRAM1"
+SRAM $02
+	"SRAM2"
+SRAM $03
+	"SRAM3"
diff --git a/src/rgbdscheck.asm b/src/rgbdscheck.asm
new file mode 100644
index 0000000..622023d
--- /dev/null
+++ b/src/rgbdscheck.asm
@@ -0,0 +1,12 @@
+; poketcg requires rgbds 0.4.1 or newer.
+MAJOR EQU 0
+MINOR EQU 4
+PATCH EQU 1
+
+IF !DEF(__RGBDS_MAJOR__) || !DEF(__RGBDS_MINOR__) || !DEF(__RGBDS_PATCH__)
+	fail "poketcg requires rgbds {MAJOR}.{MINOR}.{PATCH} or newer."
+ELIF (__RGBDS_MAJOR__ < MAJOR) || \
+	(__RGBDS_MAJOR__ == MAJOR && __RGBDS_MINOR__ < MINOR) || \
+	(__RGBDS_MAJOR__ == MAJOR && __RGBDS_MINOR__ == MINOR && __RGBDS_PATCH__ < PATCH)
+	fail "poketcg requires rgbds {MAJOR}.{MINOR}.{PATCH} or newer."
+ENDC