From 4ec8084236c881f02fcea4df5dc0c8c08fc0fea8 Mon Sep 17 00:00:00 2001
From: Lukas Krickl <lukas@krickl.dev>
Date: Sun, 30 Nov 2025 07:20:16 +0100
Subject: [PATCH] map: Added pointer to tile id table to map header

This means every map can now have a distinct table of tiledefs.
---
 src/defs.s     |  1 +
 src/levels.s   |  2 +-
 src/macros.inc |  2 ++
 src/map.s      | 17 ++++++++++++++++-
 src/wram.s     |  1 +
 5 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/src/defs.s b/src/defs.s
index 3d56155..74b7e4d 100644
--- a/src/defs.s
+++ b/src/defs.s
@@ -92,6 +92,7 @@
 .de map_tile_bank1_ptr, 2
 .de map_tile_bank2_ptr, 2
 .de map_tile_bank3_ptr, 2
+.de map_tile_id_table, 2
 .de map_header_size, 0
 	; the map header is followed by MAP_W * MAP_H bytes
 .de map_tiles, MAP_W * MAP_H
diff --git a/src/levels.s b/src/levels.s
index 3831820..62477fd 100644
--- a/src/levels.s
+++ b/src/levels.s
@@ -13,7 +13,7 @@
 	; where each tile has values and its current state. The map can be drawn from this.
 
 l1:
-	mapdef 0, map_r_nop, 0, 0, 0, bank8000, bank8800, bank8C00, bank9000
+	mapdef 0, map_r_nop, 0, 0, 0, bank8000, bank8800, bank8C00, bank9000, tile_id_table
 	.db TWL, TGS, TGS, TGS, TGS, TGS, TGS, TGS, TGS, TGS
 	.db TGS, TGS, TGS, TGS, TGS, TGS, TGS, TGS, TGS, TGS
 	.db TGS, TGS, TGS, TGS, TGS, TGS, TGS, TGS, TGS, TGS
diff --git a/src/macros.inc b/src/macros.inc
index 3855ba7..c6a2299 100644
--- a/src/macros.inc
+++ b/src/macros.inc
@@ -161,6 +161,7 @@ $1:
 	;		$7: tile bank 1
 	;		$8: tile bank 2
 	;		$9: tile bank 3
+	;		$10: tile id table
 #macro mapdef
 	.db $1
 	dw $2
@@ -171,6 +172,7 @@ $1:
 	dw $7
 	dw $8
 	dw $9
+	dw $10
 #endmacro
 	
 	; define a tile
diff --git a/src/map.s b/src/map.s
index baaa292..4667a0a 100644
--- a/src/map.s
+++ b/src/map.s
@@ -55,6 +55,15 @@ map_load:
 	; inputs:
 	;		de: map ptr
 map_tiles_load:
+	ld hl, map_tile_id_table
+	add hl, de
+	; store tile id table 
+	; in map_tile_id_table
+	ld a, [hl+]
+	ld [map_tmp_tile_id_table], a
+	ld a, [hl+]
+	ld [map_tmp_tile_id_table+1], a
+
 	ld hl, map_tiles
 	add hl, de
 	push hl
@@ -76,9 +85,15 @@ map_tiles_load:
 		
 		push hl
 		add a, a ; * 2 because it is a ptr table
-		ld hl, tile_id_table
 		ld b, 0
 		ld c, a
+
+		ld hl, tile_id_table
+		ld a, [map_tmp_tile_id_table]
+		ld l, a
+		ld a, [map_tmp_tile_id_table+1]
+		ld h, a
+
 		add hl, bc ; hl = ptr offset
 
 		; load ptr into de (source)
diff --git a/src/wram.s b/src/wram.s
index 026b41d..f37419a 100644
--- a/src/wram.s
+++ b/src/wram.s
@@ -87,6 +87,7 @@ map: .adv 2
 	; ptr to top left corner of SCRN
 	; where the map should be drawn
 map_vram_tl: .adv 2
+map_tmp_tile_id_table: .adv 2
 	
 	; ptr to current tile to be updated
 tiles: .adv t_size * MAP_TILES
-- 
2.30.2