1 files changed, 37 insertions, 0 deletions
diff --git a/src/home/interrupt.asm b/src/home/interrupt.asm
new file mode 100644
index 0000000..4b39271
--- /dev/null
+++ b/src/home/interrupt.asm
@@ -0,0 +1,37 @@
+; enable timer interrupt
+EnableInt_Timer: ; 02dd (0:02dd)
+	ldh a, [rIE]
+	or 1 << INT_TIMER
+	ldh [rIE], a
+	ret
+
+; enable vblank interrupt
+EnableInt_VBlank: ; 02e4 (0:02e4)
+	ldh a, [rIE]
+	or 1 << INT_VBLANK
+	ldh [rIE], a
+	ret
+
+; enable lcdc interrupt on hblank mode
+EnableInt_HBlank: ; 02eb (0:02eb)
+	ldh a, [rSTAT]
+	or 1 << STAT_MODE_HBLANK
+	ldh [rSTAT], a
+	xor a
+	ldh [rIF], a
+	ldh a, [rIE]
+	or 1 << INT_LCD_STAT
+	ldh [rIE], a
+	ret
+
+; disable lcdc interrupt and the hblank mode trigger
+DisableInt_HBlank: ; 02fb (0:02fb)
+	ldh a, [rSTAT]
+	and ~(1 << STAT_MODE_HBLANK)
+	ldh [rSTAT], a
+	xor a
+	ldh [rIF], a
+	ldh a, [rIE]
+	and ~(1 << INT_LCD_STAT)
+	ldh [rIE], a
+	ret