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namcona1.cpp: fixed horizontal scroll adjust and background color pen, improves X-Day 2 video emulation [Angelo Salese]

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This commit is contained in:
angelosa 2018-02-02 21:52:28 +01:00
parent 98688f7b6c
commit 347c7a990b
1 changed files with 9 additions and 4 deletions
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13
src/mame/video/namcona1.cpp
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@ -476,7 +476,7 @@ void namcona1_state::draw_background(screen_device &screen, bitmap_ind16 &bitmap
const uint16_t *scroll = &m_scroll[which * 0x400/2];
rectangle clip = cliprect;
int xadjust = 0x3a - which*2;
int scrollx = 0;
int scrollx = xadjust;
int scrolly = 0;
for( int line = 0; line < 256; line++ )
@ -489,7 +489,10 @@ void namcona1_state::draw_background(screen_device &screen, bitmap_ind16 &bitmap
if( xdata )
{
/* screenwise linescroll */
scrollx = xadjust+xdata;
if(xdata & 0x4000) // resets current xscroll value (knuckle head)
scrollx = xadjust+xdata;
else
scrollx += xdata & 0x1ff;
}
if( ydata&0x4000 )
@ -560,8 +563,10 @@ uint32_t namcona1_state::screen_update(screen_device &screen, bitmap_ind16 &bitm
screen.priority().fill(0, cliprect );
bitmap.fill(0xff, cliprect ); /* background color? */
// guess for X-Day 2 (flames in attract), seems wrong for Emeraldia but unsure
// bitmap.fill(0xff, cliprect ); /* background color? */
bitmap.fill((m_vreg[0xba/2] & 0xf) * 256, cliprect );
if( m_vreg[0x8e/2] && screen_enabled(display_rect) == true )
{
/* gfx enabled */