First Commit

Upload literally everything from the pokecrystal16 expand-move-ID branch

engine/overworld/load_map_part.asm

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+_LoadMapPart::
+	ld hl, wSurroundingTiles
+	ld a, [wPlayerMetatileY]
+	and a
+	jr z, .top_row
+	ld bc, SURROUNDING_WIDTH * 2
+	add hl, bc
+
+.top_row
+	ld a, [wPlayerMetatileX]
+	and a
+	jr z, .left_column
+	inc hl
+	inc hl
+
+.left_column
+	decoord 0, 0
+	ld b, SCREEN_HEIGHT
+.loop
+	ld c, SCREEN_WIDTH
+.loop2
+	ld a, [hli]
+	ld [de], a
+	inc de
+	dec c
+	jr nz, .loop2
+	ld a, l
+	add METATILE_WIDTH
+	ld l, a
+	jr nc, .carry
+	inc h
+
+.carry
+	dec b
+	jr nz, .loop
+	ret