From: Lukas Krickl <lukas@krickl.dev>
Date: Thu, 10 Jul 2025 03:53:06 +0000 (+0200)
Subject: video: wip stat interrupts
X-Git-Url: https://git.krickl.dev/?a=commitdiff_plain;h=3aaa6977f78efe3a391ecb83084312bbf3836219;p=gbrg%2F.git

video: wip stat interrupts
---

diff --git a/src/hw.inc b/src/hw.inc
index 3496da4..81d3cc1 100644
--- a/src/hw.inc
+++ b/src/hw.inc
@@ -18,6 +18,10 @@
 #define LCDF_OBJ_SIZE 0b00000100
 #define LCDF_WINBANKSELECT 0b01000000
 
+#define RSTAT 0xFF41
+
+#define STATF_LYC_INT_SELECT 0b01000000
+
 #define RBGP 0xFF47
 #define ROBP0 0xFF48
 #define ROBP1 0xFF49
diff --git a/src/jmp.inc b/src/jmp.inc
index 26d62f5..423680d 100644
--- a/src/jmp.inc
+++ b/src/jmp.inc
@@ -41,6 +41,7 @@ vec_vblank:
 ; STA 0x48
 ;=============
 vec_stat:
+  BREAK
   ; disable objects
   push af
   ld a, [RLCD]
diff --git a/src/video.s b/src/video.s
index cf4c024..1cb077a 100644
--- a/src/video.s
+++ b/src/video.s
@@ -85,6 +85,12 @@ lcd_on:
 
   ; init video system
 video_init:
+  ; set up STAT interrupt
+  ld a, 144-8*4 ; top of window
+  ld [RLYC], a ; set LY compare
+  ld a, STATF_LYC_INT_SELECT
+  ld [RSTAT], a
+
 
   ld hl, SCRN0
   ld bc, 1024