From f21e394e597e198d1e10bca7fd8a5e1103e95a6c Mon Sep 17 00:00:00 2001
From: Miquel Sabaté Solà <mssola@mssola.com>
Date: Fri, 6 Mar 2026 23:51:57 +0100
Subject: Bump up to 4 enemies per screen
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This is more similar to the original game, and it's a bit more fun. In
order to do so some variables had to move into another memory page, but
that's fine as we have plenty.

Signed-off-by: Miquel Sabaté Solà <mssola@mssola.com>
---
 .nasm/memory.txt | 16 ++++++++--------
 src/enemies.s    | 12 ++++++------
 2 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/.nasm/memory.txt b/.nasm/memory.txt
index 5607860..3ff57d4 100644
--- a/.nasm/memory.txt
+++ b/.nasm/memory.txt
@@ -34,13 +34,17 @@ $49: zp_velocity_x
 $50: zp_state
 $51: zp_walk_counter
 $53-$54: zp_lifes
-$60-$6B: zp_pool_base
+$60-$6F: zp_pool_base
 $70-$7B: zp_pool_base
 $7C: zp_active
 $80: zp_control
 $81: zp_mask
 $A0-$BD: zp_pool_base
-$CF: zp_player_tile_bottom
+$C0: zp_player_tile_left
+$C1: zp_player_tile_right
+$C2: zp_player_tile_top
+$C3: zp_player_tile_waist
+$C4: zp_player_tile_bottom
 $D1: zp_tiles
 $D2-$D3: zp_movement_fn
 $D4: zp_pool_index
@@ -50,11 +54,7 @@ $E0: zp_pool_size
 $E1: zp_last_allocated_index
 $E2: zp_current_bullet_y
 $E3: zp_current_bullet_x
-$F0-$FB: zp_current_tiles
-$FC: zp_player_tile_left
-$FD: zp_player_tile_right
-$FE: zp_player_tile_top
-$FF: zp_player_tile_waist
+$F0-$FF: zp_current_tiles
 $0200-$02FF: m_sprites
 $2000: m_control
 $2001: m_mask
@@ -69,4 +69,4 @@ $4016: m_joypad1
 $4017: m_frame_counter
 
 --- Summary (in bytes) ---
-- Internal RAM: 379/2048 (18.51%)
+- Internal RAM: 387/2048 (18.90%)
diff --git a/src/enemies.s b/src/enemies.s
index 99e8b91..4d46108 100644
--- a/src/enemies.s
+++ b/src/enemies.s
@@ -15,7 +15,7 @@
     ;;
     ;; NOTE: EXPLOSIONS_POOL_CAPACITY depends on this value. If you update this,
     ;; change it there.
-    ENEMIES_POOL_CAPACITY = 3
+    ENEMIES_POOL_CAPACITY = 4
 
     ;; The amount of bytes each pool item takes.
     SIZEOF_POOL_ITEM = 4
@@ -97,11 +97,11 @@
     ;; Cached values for the tile coordinates from the player. This is set
     ;; before enemy update, and it's then used during collision check for each
     ;; enemy.
-    zp_player_tile_left = $FC
-    zp_player_tile_right = $FD
-    zp_player_tile_top = $FE
-    zp_player_tile_waist = $FF
-    zp_player_tile_bottom = $CF
+    zp_player_tile_left = $C0
+    zp_player_tile_right = $C1
+    zp_player_tile_top = $C2
+    zp_player_tile_waist = $C3
+    zp_player_tile_bottom = $C4
 
     ;; Values for the counter of enemies that fall.
     ;;
-- 
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