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topland: Fix the background gradient [O. Galibert]

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This commit is contained in:
Olivier Galibert 2015-06-24 16:06:44 +02:00
parent 47fe92a260
commit 2430775b33
3 changed files with 38 additions and 29 deletions
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8
src/mame/drivers/taitoair.c
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@ -138,7 +138,9 @@ the TMS320C25 is being used as a co-processor to relieve the
along with the 68000.
Gradiation RAM is used to display a rotatable gradient background.
The rotation is most likely handled by the TC0430GRW ROZ chip.
The rotation is handled by the TC0430GRW ROZ chip which outputs
coordinates for a X=a1+b1*x+c1*y, Y=a2+b2*x+c2*y mapping. The
coordinates are used unconventionally as indices in a color palette.
"Power common ram" is for communication with a processor
controlling the sit-in-cabinet (deluxe mechanized version only).
@ -160,7 +162,7 @@ DIPs are the same as topland, which is clearly wrong if you try
them ("SWB:7,8" do not set Coin B to multiple credits for each
coin!)
Therefore, some verificiation could still be needed, once the
Therefore, some verification could still be needed, once the
emulation is complete.
@ -391,7 +393,7 @@ static ADDRESS_MAP_START( airsys_map, AS_PROGRAM, 16, taitoair_state )
AM_RANGE(0x906000, 0x906007) AM_RAM // DMA?
AM_RANGE(0x908000, 0x90ffff) AM_RAM AM_SHARE("line_ram") /* "line ram" */
AM_RANGE(0x910000, 0x91ffff) AM_RAM AM_SHARE("dsp_ram") /* "dsp common ram" (TMS320C25) */
AM_RANGE(0x980000, 0x98000f) AM_RAM AM_SHARE("backregs") /* TC0430GRW? */
AM_RANGE(0x980000, 0x98000f) AM_RAM AM_SHARE("tc0430grw") /* TC0430GRW roz transform coefficients */
AM_RANGE(0xa00000, 0xa00007) AM_READ(stick_input_r)
AM_RANGE(0xa00100, 0xa00107) AM_READ(stick2_input_r)
AM_RANGE(0xa00200, 0xa0020f) AM_DEVREADWRITE8("tc0220ioc", tc0220ioc_device, read, write, 0x00ff) /* other I/O */

4
src/mame/includes/taitoair.h
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@ -32,7 +32,7 @@ public:
m_dsp_ram(*this, "dsp_ram"),
m_paletteram(*this, "paletteram"),
m_gradram(*this, "gradram"),
m_backregs(*this, "backregs"),
m_tc0430grw(*this, "tc0430grw"),
m_maincpu(*this, "maincpu"),
m_audiocpu(*this, "audiocpu"),
m_dsp(*this, "dsp"),
@ -49,7 +49,7 @@ public:
required_shared_ptr<UINT16> m_dsp_ram; // Shared 68000/TMS32025 RAM
required_shared_ptr<UINT16> m_paletteram;
required_shared_ptr<UINT16> m_gradram;
required_shared_ptr<UINT16> m_backregs;
required_shared_ptr<UINT16> m_tc0430grw;
/* video-related */
taitoair_poly m_q;

55
src/mame/video/taitoair.c
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@ -575,36 +575,43 @@ UINT32 taitoair_state::screen_update_taitoair(screen_device &screen, bitmap_ind1
{
m_tc0080vco->tilemap_update();
bitmap.fill(0, cliprect);
UINT32 counter1 = (m_tc0430grw[0] << 16) | m_tc0430grw[1];
UINT32 inc1x = INT16(m_tc0430grw[2]);
UINT32 inc1y = INT16(m_tc0430grw[3]);
UINT32 counter2 = (m_tc0430grw[4] << 16) | m_tc0430grw[5];
UINT32 inc2x = INT16(m_tc0430grw[6]);
UINT32 inc2y = INT16(m_tc0430grw[7]);
{
int x,y;
// Deltas are 118/31
int dx = cliprect.min_x + 118;
int dy = cliprect.min_y - 48 + 31;
/*
[0x980000-3] dword for Y 0
[0x980004-7] dword for rotation param 0
[0x980008-b] dword for Y 1
[0x98000c-f] dword for rotation param 1
*/
counter1 += dx*inc1x + dy*inc1y;
counter2 += dx*inc2x + dy*inc2y;
for(y=cliprect.min_y;y<cliprect.max_y/2;y++)
{
for(x=cliprect.min_x;x<cliprect.max_x;x++)
{
bitmap.pix16(y, x) = 0x2000 + (0x3f - ((y >> 2) & 0x3f));
for(int y = cliprect.min_y; y <= cliprect.max_y; y++) {
UINT32 c1b = counter1;
UINT32 c2b = counter2;
UINT16 *dest = &bitmap.pix(y, cliprect.min_x);
for(int x = cliprect.min_x; x <= cliprect.max_x; x++) {
UINT16 base = 0;
UINT32 cntr = 0;
if(c2b & 0x800000) {
base = 0x2040;
cntr = c2b;
} else if(c1b & 0x800000) {
base = 0x2000;
cntr = c1b;
}
*dest++ = base | (cntr >= 0x83f000 ? 0x3f : (cntr >> 12) & 0x3f);
c1b += inc1x;
c2b += inc2x;
}
#if 0
for(y=cliprect.max_y/2;y<cliprect.max_y;y++)
{
for(x=cliprect.min_x;x<cliprect.max_x;x++)
{
bitmap.pix16(y, x) = 0x2040 + (0x3f - ((y >> 2) & 0x3f));
}
}
#endif
counter1 += inc1y;
counter2 += inc2y;
}
m_tc0080vco->tilemap_draw(screen, bitmap, cliprect, 0, 0, 0);