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still working on MD stuff

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This commit is contained in:
davidhay 2008-10-22 19:34:36 +00:00
parent 913716dd58
commit a25d0df144
1 changed files with 87 additions and 1 deletions
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88
src/mame/drivers/megadriv.c
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@ -92,6 +92,13 @@ static int megadrive_irq4_pending = 0;
/* 32x! */
static int _32x_master_cpu_number;
static int _32x_slave_cpu_number;
static int _32x_is_connected;
static UINT16* _32x_dram0;
static UINT16* _32x_dram1;
static UINT16 *_32x_display_dram, *_32x_access_dram;
static UINT16* _32x_palette;
static UINT16* _32x_palette_lookup;
/* SegaCD! */
static int _segacd_68k_cpu_number;
/* SVP (virtua racing) */
@ -4330,6 +4337,27 @@ static void genesis_render_videobuffer_to_screenbuffer(running_machine *machine,
}
if (_32x_is_connected)
{
UINT32 lineoffs;
lineoffs = _32x_access_dram[scanline];
for (x=0;x<320;x++)
{
UINT16 coldata;
coldata = _32x_access_dram[lineoffs];
{
lineptr[x] = _32x_palette_lookup[(coldata & 0xff00)>>8];
x++;
lineptr[x] = _32x_palette_lookup[(coldata & 0x00ff)];
}
lineoffs++;
}
}
}
static void genesis_render_scanline(running_machine *machine, int scanline)
@ -5219,6 +5247,15 @@ static void megadriv_init_common(running_machine *machine)
printf("32x SLAVE SH2 cpu found %d\n", _32x_slave_cpu_number );
}
if ((_32x_master_cpu_number != -1) && (_32x_slave_cpu_number != -1))
{
_32x_is_connected = 1;
}
else
{
_32x_is_connected = 0;
}
_segacd_68k_cpu_number = mame_find_cpu_index(machine, "segacd_68k");
if (_segacd_68k_cpu_number != -1)
{
@ -5393,7 +5430,40 @@ void megatech_set_megadrive_z80_as_megadrive_z80(running_machine *machine)
// these are tests for 'special case' hardware to make sure I don't break anything while rearranging things
//
#if 0
static READ16_HANDLER( _32x_68k_dram_r )
{
return _32x_access_dram[offset];
}
static WRITE16_HANDLER( _32x_68k_dram_w )
{
COMBINE_DATA(&_32x_access_dram[offset]);
}
static READ16_HANDLER( _32x_68k_palette_r )
{
return _32x_palette[offset];
}
static WRITE16_HANDLER( _32x_68k_palette_w )
{
int r,g,b, p;
COMBINE_DATA(&_32x_palette[offset]);
data = _32x_palette[offset];
r = ((data >> 0) & 0x1f);
g = ((data >> 5) & 0x1f);
b = ((data >> 10) & 0x1f);
p = ((data >> 15) & 0x01); // priority 'through' bit
_32x_palette_lookup[offset] = (r << 10) | (g << 5) | (b << 0);
palette_set_color_rgb(Machine,offset+0x40,pal5bit(r),pal5bit(g),pal5bit(b));
}
DRIVER_INIT( _32x )
{
memory_install_readwrite16_handler(machine, 0, ADDRESS_SPACE_PROGRAM, 0x0000000, 0x03fffff, 0, 0, SMH_BANK10, SMH_BANK10);
@ -5409,8 +5479,24 @@ DRIVER_INIT( _32x )
// memory_install_readwrite16_handler(machine, 0, ADDRESS_SPACE_PROGRAM, 0x0000100, 0x03fffff, 0, 0, SMH_NOP, SMH_NOP );
// memory_set_bankptr( 10, memory_region(machine, "32x_68k_bios") );
_32x_dram0 = auto_malloc(0x20000);
_32x_dram1 = auto_malloc(0x20000);
_32x_palette = auto_malloc(0x200);
_32x_palette_lookup = auto_malloc(0x200);
_32x_display_dram = _32x_dram0;
_32x_access_dram = _32x_dram1;
memory_install_readwrite16_handler(machine, 0, ADDRESS_SPACE_PROGRAM, 0x0840000, 0x085ffff, 0, 0, _32x_68k_dram_r, _32x_68k_dram_w); // access to 'display ram' (framebuffer)
memory_install_readwrite16_handler(machine, 0, ADDRESS_SPACE_PROGRAM, 0x0a15200, 0x0a153ff, 0, 0, _32x_68k_palette_r, _32x_68k_palette_w); // access to 'palette' xRRRRRGGGGGBBBBB
DRIVER_INIT_CALL(megadriv);
}
#if 1
ROM_START( 32x_bios )
ROM_REGION16_BE( 0x400000, "main", ROMREGION_ERASE00 )