From 314580ee4a9efca6bac47b76f5930ff6f6c4efe2 Mon Sep 17 00:00:00 2001
From: Ivan Vangelista <mesgnet@yahoo.it>
Date: Sun, 1 Nov 2020 08:33:12 +0100
Subject: [PATCH] exerion, nbmj8688, nbmj8891: initialized some variables

---
 src/mame/video/exerion.cpp  | 13 +++++--------
 src/mame/video/nbmj8688.cpp |  1 +
 src/mame/video/nbmj8891.cpp |  1 +
 3 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/src/mame/video/exerion.cpp b/src/mame/video/exerion.cpp
index 9d2de3e7fdf..a124ffc61e3 100644
--- a/src/mame/video/exerion.cpp
+++ b/src/mame/video/exerion.cpp
@@ -102,9 +102,6 @@ void exerion_state::exerion_palette(palette_device &palette) const
 
 void exerion_state::video_start()
 {
-	int i;
-	uint8_t *gfx;
-
 	/* get pointers to the mixing and lookup PROMs */
 	m_background_mixer = memregion("proms")->base() + 0x320;
 
@@ -119,6 +116,8 @@ void exerion_state::video_start()
 	save_pointer(NAME(m_background_gfx[2]), 256 * 256);
 	save_pointer(NAME(m_background_gfx[3]), 256 * 256);
 
+	m_cocktail_flip = 0;
+
 	/*---------------------------------
 	 * Decode the background graphics
 	 *
@@ -134,15 +133,13 @@ void exerion_state::video_start()
 	 * Where AA,BB,CC,DD are the 2bpp data for the pixel,and a,b,c,d are the OR
 	 * of these two bits together.
 	 */
-	gfx = memregion("gfx3")->base();
-	for (i = 0; i < 4; i++)
+	uint8_t *gfx = memregion("gfx3")->base();
+	for (int i = 0; i < 4; i++)
 	{
-		int y;
-
 		uint8_t *src = gfx + i * 0x2000;
 		uint16_t *dst = m_background_gfx[i].get();
 
-		for (y = 0; y < 0x100; y++)
+		for (int y = 0; y < 0x100; y++)
 		{
 			int x;
 
diff --git a/src/mame/video/nbmj8688.cpp b/src/mame/video/nbmj8688.cpp
index e4b8f58dffa..700d179fac2 100644
--- a/src/mame/video/nbmj8688.cpp
+++ b/src/mame/video/nbmj8688.cpp
@@ -549,6 +549,7 @@ void nbmj8688_state::common_video_start()
 
 	m_scrolly = 0;  // reset because crystalg/crystal2 don't write to this register
 	m_screen_refresh = 1;
+	m_blitter_src_addr = 0;
 
 	save_pointer(NAME(m_videoram), 512 * 256);
 	save_pointer(NAME(m_clut), 0x20);
diff --git a/src/mame/video/nbmj8891.cpp b/src/mame/video/nbmj8891.cpp
index 4b82c47ace7..78f63109aad 100644
--- a/src/mame/video/nbmj8891.cpp
+++ b/src/mame/video/nbmj8891.cpp
@@ -526,6 +526,7 @@ void nbmj8891_state::video_start()
 	memset(m_videoram1.get(), 0xff, (width * height * sizeof(uint8_t)));
 	m_gfxdraw_mode = 1;
 	m_screen_refresh = 1;
+	m_blitter_src_addr = 0;
 
 	common_save_state();
 	save_pointer(NAME(m_videoram1), width * height);