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x68k: guess at special priority mode behavior (nw)

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This commit is contained in:
cracyc 2019-09-26 15:08:21 -05:00
parent dd73b17c2a
commit afe6d421ae
1 changed files with 19 additions and 0 deletions
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19
src/mame/video/x68k.cpp
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@ -277,7 +277,10 @@ bool x68k_state::draw_gfx_scanline( bitmap_ind16 &bitmap, rectangle cliprect, ui
if(((m_video.reg[2] & 0x1800) == 0x1000) && (colour & 1))
m_special.pix16(scanline, pixel) = colour;
else
{
bitmap.pix16(scanline, pixel) = colour;
m_special.pix16(scanline, pixel) = 0;
}
}
loc++;
loc &= 0x3ff;
@ -322,7 +325,15 @@ bool x68k_state::draw_gfx_scanline( bitmap_ind16 &bitmap, rectangle cliprect, ui
else if(((m_video.reg[2] & 0x1800) == 0x1000) && (colour & 1))
m_special.pix16(scanline, pixel) = colour;
else
{
m_special.pix16(scanline, pixel) = 0;
bitmap.pix16(scanline, pixel) = colour;
}
}
else if(((m_video.reg[2] & 0x1800) == 0x1000) && m_special.pix16(scanline, pixel))
{
bitmap.pix16(scanline, pixel) = m_special.pix16(scanline, pixel);
m_special.pix16(scanline, pixel) = 0;
}
loc++;
loc &= 0x1ff;
@ -360,7 +371,15 @@ bool x68k_state::draw_gfx_scanline( bitmap_ind16 &bitmap, rectangle cliprect, ui
else if(((m_video.reg[2] & 0x1800) == 0x1000) && (colour & 1))
m_special.pix16(scanline, pixel) = colour;
else
{
bitmap.pix16(scanline, pixel) = colour;
m_special.pix16(scanline, pixel) = 0;
}
}
else if(((m_video.reg[2] & 0x1800) == 0x1000) && m_special.pix16(scanline, pixel))
{
bitmap.pix16(scanline, pixel) = m_special.pix16(scanline, pixel);
m_special.pix16(scanline, pixel) = 0;
}
loc++;
loc &= 0x1ff;