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make cybar120 look more reasonable

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This commit is contained in:
David Haywood 2017-05-24 00:16:14 +01:00
parent 9a61271e52
commit 4eaaf63226
2 changed files with 44 additions and 2 deletions
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6
src/devices/video/ppu2c0x.cpp
View File

@ -761,6 +761,11 @@ void ppu2c0x_device::draw_sprite_pixel(int sprite_xpos, int color, int pixel, ui
bitmap.pix16(m_scanline, sprite_xpos + pixel) = paldata[pixel_data];
}
void ppu2c0x_device::read_extra_sprite_bits(int sprite_index)
{
// needed for some clones
}
void ppu2c0x_device::draw_sprites( uint8_t *line_priority )
{
bitmap_ind16 &bitmap = *m_bitmap;
@ -811,6 +816,7 @@ void ppu2c0x_device::draw_sprites( uint8_t *line_priority )
pri = m_spriteram[sprite_index + 2] & 0x20;
flipx = m_spriteram[sprite_index + 2] & 0x40;
flipy = m_spriteram[sprite_index + 2] & 0x80;
read_extra_sprite_bits(sprite_index);
if (size == 16)
{

40
src/mame/drivers/nes_vt.cpp
View File

@ -365,6 +365,9 @@ void nes_vt_state::machine_reset()
int nes_vt_state::calculate_real_video_address(int addr, int extended, int readtype)
{
// might be a VT09 only feature (8bpp or 4bpp direct colour mode??)
int alt_order = m_ppu->get_201x_reg(0x0) & 0x40;
if (readtype == 0)
{
if (m_ppu->get_201x_reg(0x0) & 0x10)
@ -505,7 +508,16 @@ int nes_vt_state::calculate_real_video_address(int addr, int extended, int readt
finaladdr = ((m_410x[0x0] & 0x0F) << 21) | (va20_va18 << 18) | (va17_va10 << 10) | (addr & 0x03ff);
if (is4bpp)
finaladdr = ((finaladdr &~0xf) << 1) | (va34 << 4) | (finaladdr & 0xf);
{
if (!alt_order)
{
finaladdr = ((finaladdr &~0xf) << 1) | (va34 << 4) | (finaladdr & 0xf);
}
else
{
finaladdr = (finaladdr << 1) | (va34 << 4);
}
}
}
else
{
@ -544,7 +556,17 @@ int nes_vt_state::calculate_real_video_address(int addr, int extended, int readt
finaladdr = ((m_410x[0x0] & 0x0f) << 21) | (va17_va10 << 13) | (eva2_eva0 << 10) | (addr & 0x03ff);
if (is4bpp)
finaladdr = ((finaladdr &~0xf) << 1) | (va34 << 4) | (finaladdr & 0xf);
{
if (!alt_order)
{
finaladdr = ((finaladdr &~0xf) << 1) | (va34 << 4) | (finaladdr & 0xf);
}
else
{
finaladdr = (finaladdr << 1) | (va34 << 4);
}
}
}
return finaladdr;
@ -741,8 +763,22 @@ static const gfx_layout helper_layout =
4*64
};
static const gfx_layout helper2_layout =
{
8,8,
RGN_FRAC(1,1),
4,
{ 0*8, 1*8, 2*8, 3*8 },
{ 0,1,2,3,4,5,6,7 },
{ 0*16, 1*16, 2*16, 3*16,4*16,5*16,5*16,6*16,7*16 },
4*64
};
static GFXDECODE_START( vt03_helper )
GFXDECODE_ENTRY( "mainrom", 0, helper_layout, 0x0, 2 )
GFXDECODE_ENTRY( "mainrom", 0, helper2_layout, 0x0, 2 )
GFXDECODE_END