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sprite disable is simply word 0 bit 3

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This commit is contained in:
Michaël Banaan Ananas 2012-08-07 14:44:34 +00:00
parent 765271cb05
commit 20498d8083
1 changed files with 17 additions and 26 deletions
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43
src/mame/drivers/cybertnk.c
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@ -7,17 +7,6 @@ preliminary driver by Angelo Salese & David Haywood
Maybe it has some correlation with WEC Le Mans HW? (supposely that was originally done by Coreland too)
TODO:
- improve sprite emulation
How are unused sprites marked? None of the bits alone seem to be used for this purpose
and while in many cases the first value gets cleared to 0x0000 (palette 0, upper tile offset 0)
that doesn't really seem like a valid marker, and leaves us with some lingering sprites anyway.
Attempting to clear the spriteram every frame doesn't help either, the list is copied, complete
with 'unwanted' sprites every frame, ruling out some kind of auto clear after drawing operation.
The last entry in spriteram has 0x0008 in the first word as the only value set, maybe these bits
are used as some kind of jump list like several other systems, but I can't see the logic right now
- improve sprite zooming
Currently many sprites have an ugly 'bad' line at the top, the chances of this being caused by
bad roms is very low because a single 8 pixel block of a sprite covers 4 roms, and it's only
@ -26,7 +15,9 @@ TODO:
- sprite shadows
looks like sprites should have a shadow colour rather than the shadows being solid black, how
is this marked?
is this marked? pen 0xe might be alpha blending related?
- verify on real hw that animation is 15fps
============================================================================================
@ -290,9 +281,6 @@ static VIDEO_START( cybertnk )
state->m_tilemap2_tilemap->set_transparent_pen(0);
}
#define CYBERTNK_DRAWPIXEL \
if ((xx>=minx) && (xx<=maxx)) \
dest[xx] = paldata[dot]; \
static void draw_road(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect, int screen_shift, int pri)
@ -356,10 +344,7 @@ static void draw_sprites(screen_device &screen, bitmap_ind16 &bitmap, const rect
for(int offs=0;offs<0x1000/2;offs+=8)
{
// todo, how are sprites really disabled? our gunshots etc. still leave trails with this logic
if ((state->m_spr_ram[offs+0x0]) == 0x0000)
if ((state->m_spr_ram[offs+0x0] & 8) == 0)
continue;
int x = (state->m_spr_ram[offs+0x5] & 0x3ff);
@ -436,10 +421,16 @@ static void draw_sprites(screen_device &screen, bitmap_ind16 &bitmap, const rect
if (dot != 0)
{
dot|= col_bank<<4;
//dot|= col_bank<<4;
int xx = (x+xz)+screen_shift;
CYBERTNK_DRAWPIXEL
if ((xx>=minx) && (xx<=maxx))
{
//if (dot != 0xe)
dest[xx] = paldata[col_bank << 4 | dot];
}
//CYBERTNK_DRAWPIXEL
}
xf+=zoom;
if(xf >= 0x100)
@ -840,15 +831,15 @@ static const y8950_interface y8950_config = {
};
static MACHINE_CONFIG_START( cybertnk, cybertnk_state )
MCFG_CPU_ADD("maincpu", M68000,20000000/2)
MCFG_CPU_ADD("maincpu", M68000,XTAL_20MHz/2)
MCFG_CPU_PROGRAM_MAP(master_mem)
MCFG_CPU_VBLANK_INT("lscreen", irq1_line_assert)
MCFG_CPU_ADD("slave", M68000,20000000/2)
MCFG_CPU_ADD("slave", M68000,XTAL_20MHz/2)
MCFG_CPU_PROGRAM_MAP(slave_mem)
MCFG_CPU_VBLANK_INT("lscreen", irq3_line_hold)
MCFG_CPU_ADD("audiocpu", Z80,3579500)
MCFG_CPU_ADD("audiocpu", Z80,XTAL_3_579545MHz)
MCFG_CPU_PROGRAM_MAP(sound_mem)
MCFG_QUANTUM_TIME(attotime::from_hz(60000))//arbitrary value,needed to get the communication to work
@ -878,12 +869,12 @@ static MACHINE_CONFIG_START( cybertnk, cybertnk_state )
/* sound hardware */
MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker")
MCFG_SOUND_ADD("ym1", Y8950, 3579500)
MCFG_SOUND_ADD("ym1", Y8950, XTAL_3_579545MHz)
MCFG_SOUND_CONFIG(y8950_config)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "lspeaker", 1.0)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "rspeaker", 1.0)
MCFG_SOUND_ADD("ym2", Y8950, 3579500)
MCFG_SOUND_ADD("ym2", Y8950, XTAL_3_579545MHz)
MCFG_SOUND_CONFIG(y8950_config)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "lspeaker", 1.0)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "rspeaker", 1.0)