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x68k: special priority (nw)

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This commit is contained in:
cracyc 2016-01-05 14:11:17 -06:00
parent 71bb70d968
commit d5400e5f69
2 changed files with 30 additions and 6 deletions
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1
src/mame/includes/x68k.h
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@ -115,6 +115,7 @@ public:
bitmap_ind16 m_pcgbitmap; bitmap_ind16 m_pcgbitmap;
bitmap_ind16 m_gfxbitmap; bitmap_ind16 m_gfxbitmap;
bitmap_ind16 m_special;
void floppy_load_unload(bool load, floppy_image_device *dev); void floppy_load_unload(bool load, floppy_image_device *dev);
int floppy_load(floppy_image_device *dev); int floppy_load(floppy_image_device *dev);

35
src/mame/video/x68k.cpp
View File

@ -26,10 +26,10 @@
1 sprite layer - up to 128 16x16 sprites, 16 colours per sprite, maximum 16 sprites per scanline (not yet implemented). 1 sprite layer - up to 128 16x16 sprites, 16 colours per sprite, maximum 16 sprites per scanline (not yet implemented).
Questions: What do the other bits in m_video.reg[2] do? Questions: What do the other bits in m_video.reg[2] do?
What is "special priority mode"?
How is the intensity applied during blending if at all? How is the intensity applied during blending if at all?
Black appears to be opaque only at priority 2 but not 3, is that right? Black appears to be opaque only at priority 2 but not 3, is that right?
Are the gfx layers blended from the bottom up or all at once? Are the gfx layers blended from the bottom up or all at once?
Special priority in 16bit color mode?
*/ */
@ -783,7 +783,12 @@ bool x68k_state::x68k_draw_gfx_scanline( bitmap_ind16 &bitmap, rectangle cliprec
break; break;
} }
if(colour || (priority == 3)) if(colour || (priority == 3))
bitmap.pix16(scanline, pixel) = colour; {
if(((m_video.reg[2] & 0x1800) == 0x1000) && (colour & 1))
m_special.pix16(scanline, pixel) = colour & ~1;
else
bitmap.pix16(scanline, pixel) = colour;
}
loc++; loc++;
loc &= 0x3ff; loc &= 0x3ff;
} }
@ -824,6 +829,8 @@ bool x68k_state::x68k_draw_gfx_scanline( bitmap_ind16 &bitmap, rectangle cliprec
else else
bitmap.pix16(scanline, pixel) = (pal[colour] & 0xfffe) + blend; bitmap.pix16(scanline, pixel) = (pal[colour] & 0xfffe) + blend;
} }
else if(((m_video.reg[2] & 0x1800) == 0x1000) && (colour & 1))
m_special.pix16(scanline, pixel) = colour;
else else
bitmap.pix16(scanline, pixel) = colour; bitmap.pix16(scanline, pixel) = colour;
} }
@ -860,6 +867,8 @@ bool x68k_state::x68k_draw_gfx_scanline( bitmap_ind16 &bitmap, rectangle cliprec
else else
bitmap.pix16(scanline, pixel) = (pal[colour] & 0xfffe) + blend; bitmap.pix16(scanline, pixel) = (pal[colour] & 0xfffe) + blend;
} }
if(((m_video.reg[2] & 0x1800) == 0x1000) && (colour & 1))
m_special.pix16(scanline, pixel) = colour;
else else
bitmap.pix16(scanline, pixel) = colour; bitmap.pix16(scanline, pixel) = colour;
} }
@ -901,6 +910,8 @@ void x68k_state::x68k_draw_gfx(bitmap_rgb32 &bitmap,rectangle cliprect)
return; return;
m_gfxbitmap.fill(0, cliprect); m_gfxbitmap.fill(0, cliprect);
if((m_video.reg[2] & 0x1800) == 0x1000)
m_special.fill(0, cliprect);
for(priority=3;priority>=0;priority--) for(priority=3;priority>=0;priority--)
{ {
@ -1102,10 +1113,8 @@ VIDEO_START_MEMBER(x68k_state,x68000)
m_bg1_16->set_transparent_pen(0); m_bg1_16->set_transparent_pen(0);
m_screen->register_screen_bitmap(m_pcgbitmap); m_screen->register_screen_bitmap(m_pcgbitmap);
m_pcgbitmap.fill(0);
m_screen->register_screen_bitmap(m_gfxbitmap); m_screen->register_screen_bitmap(m_gfxbitmap);
m_gfxbitmap.fill(0); m_screen->register_screen_bitmap(m_special);
// m_scanline_timer->adjust(attotime::zero, 0, attotime::from_hz(55.45)/568); // m_scanline_timer->adjust(attotime::zero, 0, attotime::from_hz(55.45)/568);
} }
@ -1118,7 +1127,7 @@ UINT32 x68k_state::screen_update_x68000(screen_device &screen, bitmap_rgb32 &bit
int x; int x;
tilemap_t* x68k_bg0; tilemap_t* x68k_bg0;
tilemap_t* x68k_bg1; tilemap_t* x68k_bg1;
int pixel, scanline; int pixel = 0, scanline = 0;
//UINT8 *rom; //UINT8 *rom;
if((m_spritereg[0x408] & 0x03) == 0x00) // Sprite/BG H-Res 0=8x8, 1=16x16, 2 or 3 = undefined. if((m_spritereg[0x408] & 0x03) == 0x00) // Sprite/BG H-Res 0=8x8, 1=16x16, 2 or 3 = undefined.
@ -1232,6 +1241,20 @@ UINT32 x68k_state::screen_update_x68000(screen_device &screen, bitmap_rgb32 &bit
} }
} }
if((m_video.reg[2] & 0x1800) == 0x1000) // special priority
{
UINT16 colour;
for(scanline=rect.min_y;scanline<=rect.max_y;scanline++)
{
for(pixel=m_crtc.hbegin;pixel<=m_crtc.hend;pixel++)
{
colour = m_special.pix16(scanline, pixel) & 0xff;
if(colour)
bitmap.pix32(scanline, pixel) = m_gfxpalette->pen(colour & ~1);
}
}
}
#ifdef MAME_DEBUG #ifdef MAME_DEBUG
if(machine().input().code_pressed(KEYCODE_9)) if(machine().input().code_pressed(KEYCODE_9))
{ {