From 078651d273a305596162a4ab51c5f20e865e0fd5 Mon Sep 17 00:00:00 2001
From: GreaseMonkey <thematrixeatsyou@gmail.com>
Date: Sun, 11 Jun 2023 13:28:13 +1200
Subject: [PATCH] (mostly) Fix EGA split screen - fix done by @cons-cinnabar

Closes: #3386
---
 src/video/vid_ega.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/video/vid_ega.c b/src/video/vid_ega.c
index d0434fd0e..8cfd51db6 100644
--- a/src/video/vid_ega.c
+++ b/src/video/vid_ega.c
@@ -582,10 +582,11 @@ ega_poll(void *p)
         ega->vc++;
         ega->vc &= 511;
         if (ega->vc == ega->split) {
+            // TODO: Implement the hardware bug where the first scanline is drawn twice when the split happens
             if (ega->interlace && ega->oddeven)
-                ega->ma = ega->maback = ega->ma_latch + (ega->rowoffset << 1);
+                ega->ma = ega->maback = ega->rowoffset << 1;
             else
-                ega->ma = ega->maback = ega->ma_latch;
+                ega->ma = ega->maback = 0;
             ega->ma <<= 2;
             ega->maback <<= 2;
             ega->sc = 0;