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RGB palette support for correct SY-889 colours

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This commit is contained in:
David Shah 2018-01-14 16:19:26 +00:00
parent 040bd0c8d2
commit b783dfc797
3 changed files with 39 additions and 12 deletions
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19
src/devices/video/ppu2c0x_vt.cpp
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@ -40,10 +40,21 @@ READ8_MEMBER(ppu_vt03_device::palette_read)
void ppu_vt03_device::set_new_pen(int i)
{
uint16_t palval = (m_newpal[i&0x7f] & 0x3f) | ((m_newpal[(i&0x7f)+0x80] & 0x3f)<<6);
// &0x3f so we don't attempt to use any of the extended colours right now because
// I haven't managed to work out the format
m_palette->set_pen_indirect(i&0x7f,palval&0x3f);
if(m_pal_mode == PAL_MODE_NEW_RGB) {
uint16_t rgbval = (m_newpal[i&0x7f] & 0xff) | ((m_newpal[(i&0x7f)+0x80] & 0xff)<<8);
logerror ("pal %d rgb %04x\n",i,rgbval);
uint8_t blue = (rgbval & 0x001f) << 3;
uint8_t green = (rgbval & 0x3e0) >> 2;
uint8_t red = (rgbval & 0x7C00) >> 7;
m_palette->set_pen_color(i & 0x7f, rgb_t(red, green, blue));
} else {
uint16_t palval = (m_newpal[i&0x7f] & 0x3f) | ((m_newpal[(i&0x7f)+0x80] & 0x3f)<<6);
// &0x3f so we don't attempt to use any of the extended colours right now because
// I haven't managed to work out the format
m_palette->set_pen_indirect(i&0x7f,palval&0x3f);
}
}
WRITE8_MEMBER(ppu_vt03_device::palette_write)

18
src/devices/video/ppu2c0x_vt.h
View File

@ -25,13 +25,25 @@
#define MCFG_PPU_VT03_READ_SP_CB(_devcb) \
devcb = &ppu_vt03_device::set_read_sp_callback(*device, DEVCB_##_devcb);
#define MCFG_PPU_VT03_MODIFY MCFG_DEVICE_MODIFY
#define MCFG_PPU_VT03_SET_PAL_MODE(pmode) \
ppu_vt03_device::set_palette_mode(*device, pmode);
enum vtxx_pal_mode {
PAL_MODE_VT0x,
PAL_MODE_NEW_RGB,
};
class ppu_vt03_device : public ppu2c0x_device {
public:
ppu_vt03_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
template <class Object> static devcb_base &set_read_bg_callback(device_t &device, Object &&cb) { return downcast<ppu_vt03_device &>(device).m_read_bg.set_callback(std::forward<Object>(cb)); }
template <class Object> static devcb_base &set_read_sp_callback(device_t &device, Object &&cb) { return downcast<ppu_vt03_device &>(device).m_read_sp.set_callback(std::forward<Object>(cb)); }
static void set_palette_mode(device_t &device, vtxx_pal_mode pmode) { downcast<ppu_vt03_device &>(device).m_pal_mode = pmode; }
virtual DECLARE_READ8_MEMBER(read) override;
virtual DECLARE_WRITE8_MEMBER(write) override;
virtual DECLARE_READ8_MEMBER(palette_read) override;
@ -73,7 +85,9 @@ private:
palette_device *m_palette;
uint8_t m_201x_regs[0x20];
vtxx_pal_mode m_pal_mode = PAL_MODE_VT0x;
void set_2010_reg(uint8_t data);
void set_new_pen(int i);

14
src/mame/drivers/nes_vt.cpp
View File

@ -121,7 +121,7 @@ private:
void scanline_irq(int scanline, int vblank, int blanked);
uint8_t m_410x[0xc];
uint8_t vdma_ctrl;
uint8_t m_vdma_ctrl;
int m_timer_irq_enabled;
int m_timer_running;
@ -749,9 +749,9 @@ WRITE8_MEMBER(nes_vt_state::nes_vh_sprite_dma_w)
WRITE8_MEMBER(nes_vt_state::vt_hh_sprite_dma_w)
{
uint8_t dma_mode = vdma_ctrl & 0x01;
uint8_t dma_len = (vdma_ctrl >> 1) & 0x07;
uint8_t src_nib_74 = (vdma_ctrl >> 4) & 0x0F;
uint8_t dma_mode = m_vdma_ctrl & 0x01;
uint8_t dma_len = (m_vdma_ctrl >> 1) & 0x07;
uint8_t src_nib_74 = (m_vdma_ctrl >> 4) & 0x0F;
int length = 256;
switch(dma_len) {
case 0x0: length = 256; break;
@ -761,7 +761,7 @@ WRITE8_MEMBER(nes_vt_state::vt_hh_sprite_dma_w)
case 0x7: length = 128; break;
}
uint16_t src_addr = (data << 8) | (src_nib_74 << 4);
logerror("vthh dma start ctrl=%02x addr=%04x\n", vdma_ctrl, src_addr);
logerror("vthh dma start ctrl=%02x addr=%04x\n", m_vdma_ctrl, src_addr);
for (int i = 0; i < length; i++)
{
uint8_t spriteData = space.read_byte(src_addr + i);
@ -779,7 +779,7 @@ WRITE8_MEMBER(nes_vt_state::vt_hh_sprite_dma_w)
WRITE8_MEMBER(nes_vt_state::vt03_4034_w)
{
vdma_ctrl = data;
m_vdma_ctrl = data;
}
static ADDRESS_MAP_START( nes_vt_map, AS_PROGRAM, 8, nes_vt_state )
@ -935,6 +935,8 @@ MACHINE_CONFIG_END
static MACHINE_CONFIG_DERIVED( nes_vt_hh, nes_vt_xx )
MCFG_CPU_MODIFY("maincpu")
MCFG_CPU_PROGRAM_MAP(nes_vt_hh_map)
MCFG_PPU_VT03_MODIFY("ppu")
MCFG_PPU_VT03_SET_PAL_MODE(PAL_MODE_NEW_RGB);
MACHINE_CONFIG_END
static INPUT_PORTS_START( nes_vt )