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Tilemap vreg notes

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This commit is contained in:
Angelo Salese 2013-02-24 16:21:18 +00:00
parent bf64eeaaa8
commit fe02e45f6c
1 changed files with 13 additions and 3 deletions
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16
src/mame/drivers/coolridr.c
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@ -540,10 +540,21 @@ void coolridr_state::video_start()
/* 0x00000 - 0x1ffff = screen 1 */
/* 0x20000 - 0x3ffff = screen 2 */
/* 0x40000 - 0xfffff = ? */
/*
vregs are setted up with one of DMA commands (see below)
0x3e09b80 screen 1 base, 0x3e9bc0 screen 2 base
[+0x1c] ---- ---- ---- ---- ---- ---- ---- -x-- disabled on screen 1, enabled on screen 2 (tile offset start?)
[+0x1c] ---- ---- ---- ---- ---- ---- ---- ---x Enabled on bike select screen in tandem with +0x3c, solid pen fill?
[+0x2c] ---- -xxx xxxx xxxx ---- --yy yyyy yyyy scrolling registers
[+0x34] 1111 1111 2222 2222 3333 3333 4444 4444 - Almost surely Sega "map" registers
[+0x38] 5555 5555 6666 6666 7777 7777 8888 8888 /
[+0x3c] ---- ---- ---- ---- xxxx xxxx xxxx xxxx 0x11b8 on bike select, solid pen value?
(everything else is unknown at current time)
*/
UINT32 coolridr_state::screen_update_coolridr(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect, int which)
{
/* planes seems to basically be at 0x8000 and 0x28000... */
#if 1
UINT32 base_offset;
int tile,color;
int scrollx;
@ -575,7 +586,6 @@ UINT32 coolridr_state::screen_update_coolridr(screen_device &screen, bitmap_rgb3
}
}
#endif
if (which==0)
{
// will probably need a custom function
@ -1802,7 +1812,7 @@ void coolridr_state::flush_pal_data( UINT16 offset )
if(g < 0) { g = 0; }
if(b < 0) { b = 0; }
}
else if(rgb_setting == 0x920) /* at bike select, addition */
else if(rgb_setting == 0x920) /* at bike select / outside tunnels, addition */
{
r += rgb_gradient;
g += rgb_gradient;