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xavix - improve tilemap register use (nw) (#3245)

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* xavix - did a little work to push rad_box to run the game, which should hopefully allow me to figure out some more video regs etc. as it uses them in a different way again

(also some misc documentation changes to other files)

* formatting (nw)

* xavix - improve tilemap register use (nw)

* replace Star Wars Saga Edition - Lightsaber Battle Game dump that was added the other day with a good read [Sean Riddle] (nw)
This commit is contained in:
David Haywood 2018-02-20 13:28:44 +00:00 committed by R. Belmont
parent 36cb6efb61
commit 9f308593be
1 changed files with 43 additions and 20 deletions
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63
src/mame/drivers/xavix.cpp
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@ -366,29 +366,53 @@ void xavix_state::draw_tilemap(screen_device &screen, bitmap_ind16 &bitmap, cons
uint8_t* tileregs; uint8_t* tileregs;
address_space& mainspace = m_maincpu->space(AS_PROGRAM); address_space& mainspace = m_maincpu->space(AS_PROGRAM);
// all this is likely controlled by tilemap registers
if (which == 0) if (which == 0)
{ {
tileregs = m_tmap1_regs; tileregs = m_tmap1_regs;
ydimension = 16;
xdimension = 16;
ytilesize = 16;
xtilesize = 16;
offset_multiplier = 32;
opaque = 1; opaque = 1;
} }
else else
{ {
tileregs = m_tmap2_regs; tileregs = m_tmap2_regs;
opaque = 0;
}
//printf("draw tilemap %d, regs base0 %02x base1 %02x base2 %02x tilesize,bpp %02x scrollx %02x scrolly %02x pal %02x mode %02x\n", which, tileregs[0x0], tileregs[0x1], tileregs[0x2], tileregs[0x3], tileregs[0x4], tileregs[0x5], tileregs[0x6], tileregs[0x7]);
switch (tileregs[0x3] & 0x30)
{
case 0x00:
ydimension = 32; ydimension = 32;
xdimension = 32; xdimension = 32;
ytilesize = 8; ytilesize = 8;
xtilesize = 8; xtilesize = 8;
offset_multiplier = 8; break;
opaque = 0;
case 0x10:
ydimension = 32;
xdimension = 16;
ytilesize = 8;
xtilesize = 16;
break;
case 0x20: // guess
ydimension = 16;
xdimension = 32;
ytilesize = 16;
xtilesize = 8;
break;
case 0x30:
ydimension = 16;
xdimension = 16;
ytilesize = 16;
xtilesize = 16;
break;
} }
if (tileregs[0x7] & 0x02) offset_multiplier = (ytilesize * xtilesize)/8;
if (tileregs[0x7] & 0x10)
alt_tileaddressing = 1; alt_tileaddressing = 1;
else else
alt_tileaddressing = 0; alt_tileaddressing = 0;
@ -396,7 +420,7 @@ void xavix_state::draw_tilemap(screen_device &screen, bitmap_ind16 &bitmap, cons
if (tileregs[0x7] & 0x80) if (tileregs[0x7] & 0x80)
{ {
// there's a tilemap register to specify base in main ram, although in the monster truck test mode it points to an unmapped region // there's a tilemap register to specify base in main ram, although in the monster truck test mode it points to an unmapped region
// and expected a fixed layout, still need to handle that. // and expected a fixed layout, we handle that in the memory map at the moment
int count; int count;
count = 0;// ; count = 0;// ;
@ -408,9 +432,9 @@ void xavix_state::draw_tilemap(screen_device &screen, bitmap_ind16 &bitmap, cons
int tile = 0; int tile = 0;
// the register being 0 probably isn't the condition here // the register being 0 probably isn't the condition here
if (tileregs[0x0] != 0x00) tile |= mainspace.read_byte((tileregs[0x0]<<8)+count); if (tileregs[0x0] != 0x00) tile |= mainspace.read_byte((tileregs[0x0] << 8) + count);
if (tileregs[0x1] != 0x00) tile |= mainspace.read_byte((tileregs[0x1]<<8)+count) << 8; if (tileregs[0x1] != 0x00) tile |= mainspace.read_byte((tileregs[0x1] << 8) + count) << 8;
if (tileregs[0x2] != 0x00) tile |= mainspace.read_byte((tileregs[0x2]<<8)+count) << 16; if (tileregs[0x2] != 0x00) tile |= mainspace.read_byte((tileregs[0x2] << 8) + count) << 16;
count++; count++;
@ -533,10 +557,10 @@ void xavix_state::draw_tilemap(screen_device &screen, bitmap_ind16 &bitmap, cons
if (test == 1) pal = machine().rand() & 0xf; if (test == 1) pal = machine().rand() & 0xf;
draw_tile(screen, bitmap, cliprect, tile, bpp, (x * xtilesize) + scrollx, ((y * ytilesize) - 16) - scrolly, xtilesize, ytilesize, flipx, flipy, pal, opaque); draw_tile(screen, bitmap, cliprect, tile, bpp, (x * xtilesize) + scrollx, ((y * ytilesize) - 16) - scrolly, ytilesize, xtilesize, flipx, flipy, pal, opaque);
draw_tile(screen, bitmap, cliprect, tile, bpp, (x * xtilesize) + scrollx, (((y * ytilesize) - 16) - scrolly) + 256, xtilesize, ytilesize, flipx, flipy, pal, opaque); // wrap-y draw_tile(screen, bitmap, cliprect, tile, bpp, (x * xtilesize) + scrollx, (((y * ytilesize) - 16) - scrolly) + 256, ytilesize, xtilesize, flipx, flipy, pal, opaque); // wrap-y
draw_tile(screen, bitmap, cliprect, tile, bpp, ((x * xtilesize) + scrollx) - 256, ((y * ytilesize) - 16) - scrolly, xtilesize, ytilesize, flipx, flipy, pal, opaque); // wrap-x draw_tile(screen, bitmap, cliprect, tile, bpp, ((x * xtilesize) + scrollx) - 256, ((y * ytilesize) - 16) - scrolly, ytilesize, xtilesize, flipx, flipy, pal, opaque); // wrap-x
draw_tile(screen, bitmap, cliprect, tile, bpp, ((x * xtilesize) + scrollx) - 256, (((y * ytilesize) - 16) - scrolly) + 256, xtilesize, ytilesize, flipx, flipy, pal, opaque); // wrap-y and x draw_tile(screen, bitmap, cliprect, tile, bpp, ((x * xtilesize) + scrollx) - 256, (((y * ytilesize) - 16) - scrolly) + 256, ytilesize, xtilesize, flipx, flipy, pal, opaque); // wrap-y and x
} }
} }
} }
@ -1192,7 +1216,7 @@ WRITE8_MEMBER(xavix_state::tmap1_regs_w)
0x2 pointer to tile highest tile bits (if needed, depends on mode) (usually straight after the ram needed for above) 0x2 pointer to tile highest tile bits (if needed, depends on mode) (usually straight after the ram needed for above)
0x3 ---- bbb- - = ? b = bpp (0x36 xavix logo, 0x3c title screen, 0x36 course select) 0x3 --tt bbb- - = ? tt = tile/tilemap size b = bpp (0x36 xavix logo, 0x3c title screen, 0x36 course select)
0x4 and 0x5 are scroll 0x4 and 0x5 are scroll
@ -1803,8 +1827,7 @@ ROM_END
ROM_START( ttv_sw ) ROM_START( ttv_sw )
ROM_REGION( 0x800000, "bios", ROMREGION_ERASE00 ) ROM_REGION( 0x800000, "bios", ROMREGION_ERASE00 )
// wasn't giving consistent reads ROM_LOAD( "jedi.bin", 0x000000, 0x800000, CRC(51cae5fd) SHA1(1ed8d556f31b4182259ca8c766d60c824d8d9744) )
ROM_LOAD( "jedibad.bin", 0x000000, 0x800000, BAD_DUMP CRC(a12862fe) SHA1(9b5a07bdf35f72f2e2d127de5e6849ce5fa2afa0) )
ROM_END ROM_END