From e451ca23f7b28a277119866d820906ab2fed4aae Mon Sep 17 00:00:00 2001
From: Godzil <godzil@godzil.net>
Date: Wed, 2 Oct 2019 19:09:51 +0100
Subject: [PATCH] Update sample vblank code

---
 samplesplash_vblank.s | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/samplesplash_vblank.s b/samplesplash_vblank.s
index f262971..6f1b58e 100644
--- a/samplesplash_vblank.s
+++ b/samplesplash_vblank.s
@@ -1,2 +1,10 @@
+
 vblank:
-    ret
\ No newline at end of file
+    pusha
+    add word [SS:0xFE00], 0x111
+    mov AL, byte [SS:0x7002]
+    out 0x15, AL
+    inc byte [SS:0x7001]
+    inc byte [SS:0x7002]
+    POPA
+    RETF
\ No newline at end of file