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- implemented y sprite inversion CRT register; 
- added a kludge for dynagear
- used CRT registers to get the sprite x offset [Roberto Zandona']
This commit is contained in:
Roberto Zandona 2010-09-11 13:38:53 +00:00
parent 49bbd9ce1b
commit 9802dd01e7
1 changed files with 45 additions and 22 deletions
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63
src/mame/video/ssv.c
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@ -274,20 +274,26 @@ VIDEO_START( gdfs )
CRT controller, registers that are written
(resolution, visible area, flipping etc.)
1c0060-61 ?
1c0060-61 ---- ---- ---- ---- ? 21 or 2b for all games
1c0062-63 fedc ba98 7654 3210 x start visible area
1c0064-65 fedc ba98 7654 3210 x end visible area
1c0066-67 f--- ---- ---- ---- ?
1c0068-69 f--- ---- ---- ---- ?
1c0066-67 ---- ---- ---- ---- ? 1c6 for all games
1c0068-69 ---- ---- ---- ---- ? 1 for all games
1c006a-6b fedc ba98 7654 3210 y start visible area
1c006c-6d fedc ba98 7654 3210 y end visible area
1c006e-6f f--- ---- ---- ---- ?
1c0070-71 ---- --98 7654 3210 y global tilemap offset
1c0072-73 f--- ---- ---- ---- ?
1c0074-75 f--- ---- ---- ---- ?
1c006e-6f ---- ---- ---- ---- ? 106 for all games
1c0070-71 ---- ---- ---- ---- ?
---- --98 7654 3210 y global tilemap offset
1c0072-73 ---- ---- ---- ---- ?
1c0074-75 ---- ---- ---- ---- ?
-e-- ---- ---- ---- y sprite inversion
---c ---- ---- ---- x sprite inversion?
---- ba98 ---- ---- ? 0101 for all games
---- ---- -6-- ---- y tilemap inversion?
---- ---- ---4 ---- x tilemap inversion?
1c0076-77 -e-- ---- ---- ---- global/local spites coordinates
1c0078-79 f--- ---- ---- ---- ?
1c007a-7b f--- ---- ---- ---- ?
1c0078-79 ---- ---- ---- ---- ?
1c007a-7b ---- ---- ---- ---- ?
1c0060-7f:
@ -753,7 +759,7 @@ static void draw_sprites(running_machine *machine, bitmap_t *bitmap, const recta
{
int attr, code, color, num, sprite;
int sx, x, xoffs, flipx, xnum, xstart, xend, xinc, sprites_offsx;
int sy, y, yoffs, flipy, ynum, ystart, yend, yinc;
int sy, y, yoffs, flipy, ynum, ystart, yend, yinc, sprites_offsy;
int mode,global_depth,global_xnum,global_ynum;
mode = s1[ 0 ];
@ -874,28 +880,45 @@ static void draw_sprites(running_machine *machine, bitmap_t *bitmap, const recta
sprites_offsx = -((ssv_scroll[0x7a/2] & 0x0800) >> 8);
if (ssv_scroll[0x74/2] == 0x6500) // vasara
sy = 0xe8 - sy;
sprites_offsy = (-1)*((ssv_scroll[0x70/2] & 0x1ff) - (ssv_scroll[0x70/2] & 0x200)
+ ssv_scroll[0x6a/2] + 1) + ((!ssv_scroll[0x7a/2] & 0x0800) >> 8);
if (ssv_scroll[0x74/2] & 0x8000) // srmp7, twineag2, ultrax
if (ssv_scroll[0x74/2] & 0x4000) // srmp7, twineag2, ultrax, vasara
{
sy = -sy;
if (ssv_scroll[0x74/2] & 0x8000)
sy += 0x00; // srmp7, twineag2, ultrax
else
sy -= 0x08; // vasara
}
// sprites can use x and y coordinates relative to a side, the other side or the center
// for now we use a kludge
if (ssv_scroll[0x74/2] & 0x8000)
{
if (ssv_scroll[0x76/2] & 0x4000) { // twineag2, ultrax
sx = sprites_offsx + sx - (xnum-1) * 8;
sy = state->sprites_offsy + sy - (ynum * 8) / 2;
sx = sprites_offsx + sx - (xnum - 1) * 8;
sy = sprites_offsy - sy - (ynum * 8) / 2;
} else { // srmp7
sx = sprites_offsx + sx;
sy = state->sprites_offsy + sy;
sy = sprites_offsy - sy;
}
}
else if (ssv_scroll[0x76/2] & 0x1000) // eaglshot
{
sx = sprites_offsx + sx - (xnum-1) * 8;
sy = state->sprites_offsy - sy - (ynum * 8) / 2; // sy is the sprite center
sx = sprites_offsx + sx - (xnum - 1) * 8;
sy = sprites_offsy - sy - (ynum * 8) / 2;
}
else
else if (ssv_scroll[0x70/2] == 0x02fd) // dynagear
{
sx = sprites_offsx + sx;
sy = state->sprites_offsy - sy - (ynum-1) * 8;
sy = sprites_offsy - sy - (ynum * 8) / 2;
}
else // other games
{
sx = sprites_offsx + sx;
sy = sprites_offsy - sy - (ynum - 1) * 8;
}
/* Sprite code masking */