Replacing VRAM magic numbers with constants

12 files changed, 33 insertions, 17 deletions

diff --git a/game/src/game.c b/game/src/game.c
index d4942c1..62d5edb 100644
--- a/game/src/game.c
+++ b/game/src/game.c
@@ -17,6 +17,8 @@
 #include "player.h"
 #include "enemy.h"
 
+#define BG_TILE_MAP 0x1800
+
 void init_map_entities()
 {
     const uint8_t *m = cur_map;
@@ -91,7 +93,7 @@ void draw_map()
     // so we do it in one call by coping our map to the backtround tile map
     // addr in the VDP VRAM
     ubox_wait_vsync();
-    ubox_write_vm((uint8_t *)0x1800, MAP_W * MAP_H, cur_map_data);
+    ubox_write_vm((uint8_t *)BG_TILE_MAP, MAP_W * MAP_H, cur_map_data);
 }
 
 void draw_hud()
diff --git a/src/spman/spman.c b/src/spman/spman.c
index 642864e..ba8a939 100644
--- a/src/spman/spman.c
+++ b/src/spman/spman.c
@@ -6,6 +6,7 @@
 #define SPMAN_PAT_UNUSED    0xff
 #define SPMAN_MAX_SPRITES   32
 #define SPMAN_MAX_PATTERNS  64
+#define SPMAN_SPR_ATTRS     0x1b00
 
 uint8_t sp_last_sprite, sp_last_fixed_sprite, sp_idx;
 struct sprite_attr sp_fixed[SPMAN_MAX_SPRITES];
@@ -84,7 +85,7 @@ static uint8_t *p;
 
 void spman_update()
 {
-    p = (uint8_t*) 0x1b00;
+    p = (uint8_t*)SPMAN_SPR_ATTRS;
 
     if (sp_last_sprite)
     {
@@ -115,5 +116,5 @@ void spman_update()
 void spman_hide_all_sprites()
 {
     ubox_wait_vsync();
-    ubox_write_vm((uint8_t *)0x1b00, 4, (uint8_t *)hide);
+    ubox_write_vm((uint8_t *)SPMAN_SPR_ATTRS, 4, (uint8_t *)hide);
 }
diff --git a/src/ubox/ubox_fill_screen.z80 b/src/ubox/ubox_fill_screen.z80
index ed8c58f..e803f76 100644
--- a/src/ubox/ubox_fill_screen.z80
+++ b/src/ubox/ubox_fill_screen.z80
@@ -1,10 +1,11 @@
 .globl _ubox_fill_screen
 
 FILVRM = 0x0056
+BG_TILE_MAP = 0x1800
 
 _ubox_fill_screen::
 	ld a, l
-	ld hl, #0x1800
+	ld hl, #BG_TILE_MAP
 	ld bc, #768
 	jp FILVRM
 
diff --git a/src/ubox/ubox_get_tile.z80 b/src/ubox/ubox_get_tile.z80
index 49dcb30..3a6004d 100644
--- a/src/ubox/ubox_get_tile.z80
+++ b/src/ubox/ubox_get_tile.z80
@@ -1,6 +1,7 @@
 .globl _ubox_get_tile
 
 RDVRM = 0x004a
+BG_TILE_MAP = 0x1800
 
 _ubox_get_tile::
 	ld hl, #2
@@ -19,7 +20,7 @@ _ubox_get_tile::
 	add hl, hl
 	add hl, bc
 
-	ld bc, #0x1800
+	ld bc, #BG_TILE_MAP
 	add hl, bc
 
 	call RDVRM
diff --git a/src/ubox/ubox_put_tile.z80 b/src/ubox/ubox_put_tile.z80
index 1bdf3ce..24e58b2 100644
--- a/src/ubox/ubox_put_tile.z80
+++ b/src/ubox/ubox_put_tile.z80
@@ -1,6 +1,7 @@
 .globl _ubox_put_tile
 
 WRTVRM = 0x004d
+BG_TILE_MAP = 0x1800
 
 _ubox_put_tile::
 	ld hl, #2
@@ -23,7 +24,7 @@ _ubox_put_tile::
 	ld b, #0
 	add hl, bc
 
-	ld bc, #0x1800
+	ld bc, #BG_TILE_MAP
 	add hl, bc
 
 	jp WRTVRM
diff --git a/src/ubox/ubox_set_sprite_attr.z80 b/src/ubox/ubox_set_sprite_attr.z80
index fe573b6..4e5c80e 100644
--- a/src/ubox/ubox_set_sprite_attr.z80
+++ b/src/ubox/ubox_set_sprite_attr.z80
@@ -1,6 +1,8 @@
 .globl _ubox_set_sprite_attr
 .globl _ubox_write_vm
 
+SP_ATTRS = 0x1b00
+
 _ubox_set_sprite_attr::
 	ld hl, #2
 	add hl, sp
@@ -14,7 +16,7 @@ _ubox_set_sprite_attr::
 	sla l
 	sla l
 	ld h, #0
-	ld bc, #0x1b00
+	ld bc, #SP_ATTRS
 	add hl, bc
 
 	push de
diff --git a/src/ubox/ubox_set_sprite_pat16.z80 b/src/ubox/ubox_set_sprite_pat16.z80
index 4689267..59d7ccb 100644
--- a/src/ubox/ubox_set_sprite_pat16.z80
+++ b/src/ubox/ubox_set_sprite_pat16.z80
@@ -1,6 +1,8 @@
 .globl _ubox_set_sprite_pat16
 .globl _ubox_write_vm
 
+SP_PATTERNS = 0x3800
+
 _ubox_set_sprite_pat16::
 	ld hl, #2
 	add hl, sp
@@ -17,7 +19,7 @@ _ubox_set_sprite_pat16::
 	add hl, hl
 	add hl, hl
 	add hl, hl
-	ld bc, #0x3800
+	ld bc, #SP_PATTERNS
 	add hl, bc
 
 	push de
diff --git a/src/ubox/ubox_set_sprite_pat16_flip.z80 b/src/ubox/ubox_set_sprite_pat16_flip.z80
index bb960f8..5631808 100644
--- a/src/ubox/ubox_set_sprite_pat16_flip.z80
+++ b/src/ubox/ubox_set_sprite_pat16_flip.z80
@@ -1,6 +1,7 @@
 .globl _ubox_set_sprite_pat16_flip
 
 WRTVRM = 0x004d
+SP_PATTERNS = 0x3800
 
 _ubox_set_sprite_pat16_flip::
 	ld hl, #2
@@ -18,7 +19,7 @@ _ubox_set_sprite_pat16_flip::
 	add hl, hl
 	add hl, hl
 	add hl, hl
-	ld bc, #0x3800
+	ld bc, #SP_PATTERNS
 	add hl, bc
 
 	push de
diff --git a/src/ubox/ubox_set_sprite_pat8.z80 b/src/ubox/ubox_set_sprite_pat8.z80
index 11b0205..06b484c 100644
--- a/src/ubox/ubox_set_sprite_pat8.z80
+++ b/src/ubox/ubox_set_sprite_pat8.z80
@@ -1,6 +1,8 @@
 .globl _ubox_set_sprite_pat8
 .globl _ubox_write_vm
 
+SP_PATTERNS = 0x3800
+
 _ubox_set_sprite_pat8::
 	ld hl, #2
 	add hl, sp
@@ -15,7 +17,7 @@ _ubox_set_sprite_pat8::
 	add hl, hl
 	add hl, hl
 	add hl, hl
-	ld bc, #0x3800
+	ld bc, #SP_PATTERNS
 	add hl, bc
 
 	push de
diff --git a/src/ubox/ubox_set_sprite_pat8_flip.z80 b/src/ubox/ubox_set_sprite_pat8_flip.z80
index a3f8d1d..fdcf9ec 100644
--- a/src/ubox/ubox_set_sprite_pat8_flip.z80
+++ b/src/ubox/ubox_set_sprite_pat8_flip.z80
@@ -1,6 +1,7 @@
 .globl _ubox_set_sprite_pat8_flip
 
 WRTVRM = 0x004d
+SP_PATTERNS = 0x3800
 
 _ubox_set_sprite_pat8_flip::
 	ld hl, #2
@@ -16,7 +17,7 @@ _ubox_set_sprite_pat8_flip::
 	add hl, hl
 	add hl, hl
 	add hl, hl
-	ld bc, #0x3800
+	ld bc, #SP_PATTERNS
 	add hl, bc
 
 	ld b, #8
diff --git a/src/ubox/ubox_set_tiles.z80 b/src/ubox/ubox_set_tiles.z80
index fbb2ff9..7e4f42e 100644
--- a/src/ubox/ubox_set_tiles.z80
+++ b/src/ubox/ubox_set_tiles.z80
@@ -1,21 +1,22 @@
 .globl _ubox_set_tiles
 
 LDIRVM = 0x005c
+BG_TILES = 0x0
 
 _ubox_set_tiles::
-	ld de, #0
+	ld de, #BG_TILES
 	ld bc, #256 * 8
 	push hl
 	call LDIRVM
 	pop hl
 
-	ld de, #256 * 8
+	ld de, #BG_TILES + #256 * 8
 	ld bc, #256 * 8
 	push hl
 	call LDIRVM
 	pop hl
 
-	ld de, #256 * 8 * 2
+	ld de, #BG_TILES + #256 * 8 * 2
 	ld bc, #256 * 8
 	jp LDIRVM
 
diff --git a/src/ubox/ubox_set_tiles_colors.z80 b/src/ubox/ubox_set_tiles_colors.z80
index 8ba2609..4c4591b 100644
--- a/src/ubox/ubox_set_tiles_colors.z80
+++ b/src/ubox/ubox_set_tiles_colors.z80
@@ -1,21 +1,22 @@
 .globl _ubox_set_tiles_colors
 
 LDIRVM = 0x005c
+BG_COLS = 0x2000
 
 _ubox_set_tiles_colors::
-	ld de, #0x2000
+	ld de, #BG_COLS
 	ld bc, #256 * 8
 	push hl
 	call LDIRVM
 	pop hl
 
-	ld de, #0x2000 + 256  * 8
+	ld de, #BG_COLS + 256  * 8
 	ld bc, #256 * 8
 	push hl
 	call LDIRVM
 	pop hl
 
-	ld de, #0x2000 + 256  * 8 * 2
+	ld de, #BG_COLS + 256  * 8 * 2
 	ld bc, #256 * 8
 	jp LDIRVM