From 7329c4038ad672818b6f78ab197684395f9f019e Mon Sep 17 00:00:00 2001
From: Robbbert <robbbert@users.noreply.github.com>
Date: Thu, 1 May 2014 07:02:25 +0000
Subject: [PATCH] i8275 fixes - Codes f0-f3 should be invisible - Fixed rubbish
 on zorba intro screen

Unior: fixed regression with cursor.
---
 src/emu/video/i8275.c    | 12 +++++++++++-
 src/emu/video/i8275.h    |  1 +
 src/mess/drivers/unior.c |  2 +-
 3 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/src/emu/video/i8275.c b/src/emu/video/i8275.c
index d19e32a6217..1bf232c94ee 100644
--- a/src/emu/video/i8275.c
+++ b/src/emu/video/i8275.c
@@ -118,7 +118,8 @@ i8275_device::i8275_device(const machine_config &mconfig, const char *tag, devic
 	m_dma_stop(false),
 	m_end_of_screen(false),
 	m_cursor_blink(0),
-	m_char_blink(0)
+	m_char_blink(0),
+	m_stored_attr(0)
 {
 }
 
@@ -266,6 +267,7 @@ void i8275_device::device_timer(emu_timer &timer, device_timer_id id, int param,
 
 			m_char_blink++;
 			m_char_blink &= 0x3f;
+			m_stored_attr = 0;
 		}
 		
 		if (m_scanline == m_vrtc_drq_scanline)
@@ -283,6 +285,11 @@ void i8275_device::device_timer(emu_timer &timer, device_timer_id id, int param,
 		{
 			int line_counter = OFFSET_LINE_COUNTER ? ((lc - 1) % SCANLINES_PER_ROW) : lc;
 			bool end_of_row = false;
+			m_hlgt = (m_stored_attr & FAC_H) ? 1 : 0;
+			m_vsp = (m_stored_attr & FAC_B) ? 1 : 0;
+			m_gpa = (m_stored_attr & FAC_GG) >> 2;
+			m_rvv = (m_stored_attr & FAC_R) ? 1 : 0;
+			m_lten = (m_stored_attr & FAC_U) ? 1 : 0;
 
 			for (int sx = 0; sx < CHARACTERS_PER_ROW; sx++)
 			{
@@ -302,6 +309,8 @@ void i8275_device::device_timer(emu_timer &timer, device_timer_id id, int param,
 						m_gpa = (data & FAC_GG) >> 2;
 						m_rvv = (data & FAC_R) ? 1 : 0;
 						m_lten = (data & FAC_U) ? 1 : 0;
+						if ((SCANLINES_PER_ROW - lc)==1)
+							m_stored_attr = data;
 
 						if (!VISIBLE_FIELD_ATTRIBUTE)
 						{
@@ -334,6 +343,7 @@ void i8275_device::device_timer(emu_timer &timer, device_timer_id id, int param,
 								m_end_of_screen = true;
 								break;
 							}
+							vsp = 1;
 						}
 						else
 						{
diff --git a/src/emu/video/i8275.h b/src/emu/video/i8275.h
index 461122820fd..305252ca1ba 100644
--- a/src/emu/video/i8275.h
+++ b/src/emu/video/i8275.h
@@ -222,6 +222,7 @@ protected:
 
 	int m_cursor_blink;
 	int m_char_blink;
+	UINT8 m_stored_attr;
 
 	// timers
 	emu_timer *m_hrtc_on_timer;
diff --git a/src/mess/drivers/unior.c b/src/mess/drivers/unior.c
index 8f7c986d8d6..3481061c517 100644
--- a/src/mess/drivers/unior.c
+++ b/src/mess/drivers/unior.c
@@ -264,7 +264,7 @@ I8275_DRAW_CHARACTER_MEMBER(unior_state::display_pixels)
 	UINT8 gfx = m_p_chargen[(linecount & 7) | (charcode << 3)];
 
 	if(linecount == 8)
-		return;
+		gfx = 0;
 
 	if (vsp)
 		gfx = 0;