1 files changed, 133 insertions, 0 deletions
diff --git a/src/engine/bank20.asm b/src/engine/bank20.asm
new file mode 100755
index 0000000..11ca29a
--- /dev/null
+++ b/src/engine/bank20.asm
@@ -0,0 +1,133 @@
+Func_80000: ; 80000 (20:4000)
+INCBIN "baserom.gbc",$80000,$80028 - $80000
+
+Func_80028: ; 80028 (20:4028)
+INCBIN "baserom.gbc",$80028,$8020f - $80028
+
+Func_8020f: ; 8020f (20:420f)
+	push bc
+	push af
+	ld bc, MapDataPointers
+	ld h, $0
+	add hl, bc
+	ld c, [hl]
+	inc hl
+	ld b, [hl]
+	pop af
+	ld l, a
+	ld h, $0
+	sla l
+	rl h
+	sla l
+	rl h
+	add hl, bc
+	pop bc
+	ret
+
+Func_80229: ; 80229 (20:4229)
+	ld a, [hli]
+	ld [$d4c4], a
+	ld a, [hli]
+	ld [$d4c5], a
+	ld a, [hli]
+	add $20
+	ld [$d4c6], a
+	ret
+; 0x80238
+
+INCBIN "baserom.gbc",$80238,$8025b - $80238
+
+Func_8025b: ; 8025b (20:425b)
+	push hl
+	ld l, $4
+	call Func_8020f
+	call Func_80229
+	ld a, [hl]
+	push af
+	ld [$d4c8], a
+	ld a, $10
+	ld [$d4c7], a
+	call Func_80274
+	pop af
+	pop hl
+	ret
+
+Func_80274: ; 80274 (20:4274)
+	call Func_8029f
+	jr asm_8027c
+
+Func_80279: ; 80279 (20:4279)
+	call Func_802bb
+asm_8027c
+	push hl
+	push bc
+	push de
+	ld a, [$d4c8]
+	ld b, a
+	ld a, [$d4c7]
+	ld c, a
+	ld hl, $d4c2
+	ld e, [hl]
+	inc hl
+	ld d, [hl]
+	ld hl, $d4c4
+	ld a, [hli]
+	ld h, [hl]
+	ld l, a
+	inc hl
+	inc hl
+	call Func_395a
+	call BankswitchVRAM_0
+	pop de
+	pop bc
+	pop hl
+	ret
+
+Func_8029f: ; 8029f (20:429f)
+	ld a, [$d4ca]
+	swap a
+	push af
+	and $f0
+	ld [$d4c2], a
+	pop af
+	and $f
+	add $80
+	ld [$d4c3], a
+	ld a, [$d4cb]
+	and $1
+	call BankswitchVRAM
+	ret
+
+Func_802bb: ; 802bb (20:42bb)
+	ld a, [$d4ca]
+	push af
+	xor $80
+	ld [$d4ca], a
+	call Func_8029f
+	ld a, [$d4c3]
+	add $8
+	ld [$d4c3], a
+	pop af
+	ld [$d4ca], a
+	ret
+; 0x802d4
+
+INCBIN "baserom.gbc",$802d4,$80418 - $802d4
+
+Func_80418: ; 80418 (20:4418)
+INCBIN "baserom.gbc",$80418,$80480 - $80418
+
+Func_80480: ; 80480 (20:4480)
+INCBIN "baserom.gbc",$80480,$804d8 - $80480
+
+Func_804d8: ; 804d8 (20:44d8)
+INCBIN "baserom.gbc",$804d8,$80b7a - $804d8
+
+Func_80b7a: ; 80b7a (20:4b7a)
+INCBIN "baserom.gbc",$80b7a,$80e5a - $80b7a
+
+Unknown_80e5a: ; 80e5a (20:4e5a)
+INCBIN "baserom.gbc",$80e5a,$80e5d - $80e5a
+
+MapDataPointers: ; 80e5d (20:4e5d)
+INCBIN "baserom.gbc",$80e5d,$84000 - $80e5d