From a271486f09741cd583aece92a95c39f35a7cdc81 Mon Sep 17 00:00:00 2001
From: Lukas Krickl <lukas@krickl.dev>
Date: Wed, 9 Jul 2025 07:40:55 +0200
Subject: [PATCH] video: wip disabling objects when window is drawing

---
 src/jmp.inc | 14 ++++++++++++--
 src/video.s |  8 ++++++++
 src/wram.s  |  2 +-
 3 files changed, 21 insertions(+), 3 deletions(-)

diff --git a/src/jmp.inc b/src/jmp.inc
index b5eaead..26d62f5 100644
--- a/src/jmp.inc
+++ b/src/jmp.inc
@@ -33,8 +33,18 @@ sys_farcall:
 ; vblank 0x40
 ;=============
 vec_vblank:
-  push_all 
   call vblank  
-  pop_all
+  reti
 
+.fill 0, 0x48 - $
+;=============
+; STA 0x48
+;=============
+vec_stat:
+  ; disable objects
+  push af
+  ld a, [RLCD]
+  and a, ~LCDCF_OBJON & 0xFF
+  ld [RLCD], a
+  pop af
   reti
diff --git a/src/video.s b/src/video.s
index d108375..cf4c024 100644
--- a/src/video.s
+++ b/src/video.s
@@ -4,6 +4,13 @@
 
   ; vblank handler
 vblank:
+  push_all 
+  
+  ; enable objects
+  ld a, [RLCD]
+  or a, LCDCF_OBJON
+  ld [RLCD], a
+
   ; dma previous frame's oam
   call OAMDMAFN
   
@@ -25,6 +32,7 @@ vblank:
 
   ld a, 1
   ld [frame_ready], a
+  pop_all
   ret
 
 
diff --git a/src/wram.s b/src/wram.s
index 036e9b8..2c106fd 100644
--- a/src/wram.s
+++ b/src/wram.s
@@ -34,7 +34,7 @@ status_text: .adv 32
 demo_inputs: .adv 2
 
   ; offset into bg_update_queue 
-bg_update_index: .adv 2
+bg_update_index: .adv 1
 bg_update_queue: .adv bge_size * BGE_MAX 
 
 draw_flags: .adv 1
-- 
2.30.2