From 0d9939fe5ec7f0091092ea82f2905750b50971e8 Mon Sep 17 00:00:00 2001
From: David Haywood <28625134+DavidHaywood@users.noreply.github.com>
Date: Mon, 1 Jan 2018 15:07:58 +0000
Subject: [PATCH] kov3: treat this bit as 'sprite disable' - prevents stray
 horemen heads in kov3 attract, changes what you see in the shop (improves,
 hopefully, I can't read Chinese)

---
 src/mame/video/pgm2.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/mame/video/pgm2.cpp b/src/mame/video/pgm2.cpp
index 8b485ea6be4..c88a704b20e 100644
--- a/src/mame/video/pgm2.cpp
+++ b/src/mame/video/pgm2.cpp
@@ -158,7 +158,10 @@ void pgm2_state::draw_sprites(screen_device &screen, const rectangle &cliprect,
 			int pal =   (spriteram[i + 0] & 0x0fc00000) >> 22;
 			int pri =   (spriteram[i + 0] & 0x80000000) >> 31;
 
-			int unk0 =  (spriteram[i + 0] & 0x70000000) >> 0;
+			int unk0 =  (spriteram[i + 0] & 0x30000000) >> 0;
+			int disable = (spriteram[i + 0] & 0x40000000) >> 30; // kov3 uses this in places (eg. horsemen special move heads) when it can only possibly mean 'disable' also used in places on kov2nl and orleg2, often the 'power up' effects - verify it is disable there too
+
+			if (disable) continue;
 
 			int sizex = (spriteram[i + 1] & 0x0000003f) >> 0;
 			int sizey = (spriteram[i + 1] & 0x00007fc0) >> 6;
@@ -172,7 +175,6 @@ void pgm2_state::draw_sprites(screen_device &screen, const rectangle &cliprect,
 
 			if (unk0 || unk1)
 			{
-				// unk0 & 0x40000000 set during gameplay on kov2nl, why? more pri bits?
 				//popmessage("sprite rendering unused bits set unk0 %08x unk1 %08x\n", unk0, unk1);
 			}