From e05e355a1273c0384060f503836adac36129e13f Mon Sep 17 00:00:00 2001
From: angelosa <lordkale4@gmail.com>
Date: Thu, 17 Oct 2024 18:24:09 +0200
Subject: [PATCH] nec/pc9801_v.cpp: reverse attribute will draw opaque on Y
 char limit * fix daremo intro

---
 src/mame/nec/pc9801_v.cpp | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/src/mame/nec/pc9801_v.cpp b/src/mame/nec/pc9801_v.cpp
index e23f010421d..7d90180b0e5 100644
--- a/src/mame/nec/pc9801_v.cpp
+++ b/src/mame/nec/pc9801_v.cpp
@@ -96,6 +96,8 @@ void pc9801_state::draw_text(bitmap_rgb32 &bitmap, uint32_t addr, int y, int wd,
 	int scroll_end = scroll_start + m_txt_scroll_reg[5];
 	int scroll = m_txt_scroll_reg[3] % 20;
 	int line = y / lr;
+	// TODO: accurate blink rate
+	const bool is_blink_rate = m_screen->frame_number() & 0x10;
 
 	for(int x=0;x<pitch;x+=x_step)
 	{
@@ -223,18 +225,19 @@ void pc9801_state::draw_text(bitmap_rgb32 &bitmap, uint32_t addr, int y, int wd,
 					}
 					if(v_line)  { tile_data|=8; }
 
-					/* TODO: proper blink rate for these two */
-					if(cursor_on && cursor_addr == tile_addr && m_screen->frame_number() & 0x10)
+					if(cursor_on && cursor_addr == tile_addr && is_blink_rate)
 						tile_data^=0xff;
 
-					if(blink && m_screen->frame_number() & 0x10)
+					if(blink && is_blink_rate)
 						tile_data = 0;
 
 					if(reverse) { tile_data^=0xff; }
 
 					int pen;
+					// daremo wants to mask during intro with reverse attribute only
+					// using color is a guess: may just be black.
 					if(yi >= char_size)
-						pen = -1;
+						pen = reverse ? color : -1;
 					else
 						pen = (tile_data >> (7-xi) & 1) ? color : -1;