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Adjusted alternate palette handling weights to more accurately match real hardware - text anti-aliasing is much more noticable.

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Adjustment to roz layer priority - prevents roz layer from incorrectly being displayed over backgrounds in some games (i.e. numanathj)

Added a mask when processing the roz tilemap to avoid defects in emeraldj
This commit is contained in:
Phil Stroffolino 2008-05-16 13:22:04 +00:00
parent 271ac2a7a2
commit c8e3dcfc5e
1 changed files with 34 additions and 18 deletions
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52
src/mame/video/namcona1.c
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@ -91,11 +91,11 @@ static TILE_GET_INFO( roz_get_info )
{
/* each logical tile is constructed from 4*4 normal tiles */
int tilemap_color = roz_palette;
int use_4bpp_gfx = namcona1_vreg[0xbc/2]&16;
int use_4bpp_gfx = namcona1_vreg[0xbc/2]&16; /* ? */
int c = tile_index%0x40;
int r = tile_index/0x40;
int data = videoram16[0x8000/2+(r/4)*0x40+c/4]+(c%4)+(r%4)*0x40;
int tile = data&0xfff;
int data = videoram16[0x8000/2+(r/4)*0x40+c/4]&0xfbf; /* mask out bit 0x40 - patch for Emeraldia Japan */
int tile = (data+(c%4)+(r%4)*0x40)&0xfff;
int gfx = use_4bpp_gfx;
if( use_4bpp_gfx )
{
@ -153,20 +153,19 @@ READ16_HANDLER( namcona1_videoram_r )
static void
UpdatePalette(running_machine *machine, int offset )
{
int r,g,b;
UINT16 data = paletteram16[offset]; /* -RRRRRGG GGGBBBBB */
palette_set_color_rgb( machine, offset, pal5bit(data >> 10), pal5bit(data >> 5), pal5bit(data >> 0));
/**
* sprites can be configured to use an alternate interpretation of palette ram
* (used in-game in Emeraldia)
*
* RRRGGGBB RRRGGGBB
*/
r = ((data&0x00e0)>>5)|((data&0xe000)>>(13-3));
g = ((data&0x001c)>>2)|((data&0x1c00)>>(10-3));
b = ((data&0x0003)>>0)|((data&0x0300)>>(8-2));
palette_set_color_rgb( machine, offset+0x1000, pal6bit(r), pal6bit(g), pal4bit(b) );
int r = (((data&0x00e0)>>5)+((data&0xe000)>>13)*2)*0xff/(0x7*3);
int g = (((data&0x001c)>>2)+((data&0x1c00)>>10)*2)*0xff/(0x7*3);
int b = (((data&0x0003)>>0)+((data&0x0300)>>8)*2)*0xff/(0x3*3);
palette_set_color_rgb( machine, offset+0x1000, r, g, b);
palette_set_color_rgb( machine, offset, pal5bit(data >> 10), pal5bit(data >> 5), pal5bit(data >> 0));
} /* namcona1_paletteram_w */
READ16_HANDLER( namcona1_paletteram_r )
@ -178,8 +177,7 @@ WRITE16_HANDLER( namcona1_paletteram_w )
{
COMBINE_DATA( &paletteram16[offset] );
if( namcona1_vreg[0x8e/2] )
{
/* graphics enabled; update palette immediately */
{ /* graphics enabled; update palette immediately */
UpdatePalette(machine, offset );
}
else
@ -735,7 +733,15 @@ VIDEO_UPDATE( namcona1 )
{
for( which=4; which>=0; which-- )
{
int pri = namcona1_vreg[0xa0/2+which]&0x7;
int pri;
if( which==4 )
{
pri = namcona1_vreg[0xa0/2+5]&0x7;
}
else
{
pri = namcona1_vreg[0xa0/2+which]&0x7;
}
if( pri == priority )
{
draw_background(screen->machine,bitmap,cliprect,which,priority);
@ -749,6 +755,8 @@ VIDEO_UPDATE( namcona1 )
}
/*
roz bad in emeraldaj - blit param?
$efff20: sprite control: 0x3a,0x3e,0x3f
bit 0x01 selects spriteram bank
@ -756,10 +764,18 @@ $efff20: sprite control: 0x3a,0x3e,0x3f
$efff00: src0 src1 src2 dst0 dst1 dst2 BANK [src
$efff10: src] [dst dst] #BYT BLIT eINT 001f 0001
$efff20: 003f 003f IACK ---- ---- ---- ---- ----
$efff80: 0050 0170 0020 0100 0000 POSI 0000 GFXE POSI: scanline for POSIRQ
...
$efff80: 0050 0170 0020 0100 0170 POS? 0000 GFXE
$efff90: 0000 0001 0002 0003 FLIP ---- ---- ----
$efffa0: PRI PRI PRI PRI ---- PRI? --?? ---- priority (0..7)
$efffb0: CLR CLR CLR CLR 0001 CLR? BPP ---- color (0..f), bpp flag per layer
$efffc0: RZXX RZXY RZYX RZYY RZX0 RZY0 ???? ---- ROZ
*/
$efffa0: PRI PRI PRI PRI ???? PRI 00c0 ---- priority (0..7)
$efffb0: CLR CLR CLR CLR 0001 CLR BPP ---- color (0..f), bpp flag per layer
$efffc0: RZXX RZXY RZYX RZYY RZX0 RZY0 0044 ---- ROZ
Emeralda: 0048 0177 0020 0100 0000 00f0 0000 0001 in-game
0050 0170 0020 0100 0000 00f0 0000 0001 self test
NumanAth: 0050 0170 0020 0100 0170 00d8 0000 0001 in-game
*/