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a 16-bit 556 split access palette (8+8) on a 32-bit bus... ok...

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This commit is contained in:
David Haywood 2016-10-05 15:12:30 +01:00
parent 1f10ae9609
commit 5b013a346c
1 changed files with 45 additions and 4 deletions
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49
src/mame/drivers/mjsenpu.cpp
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@ -33,6 +33,14 @@ public:
required_device<okim6295_device> m_oki;
required_shared_ptr<UINT32> m_vram;
UINT8 m_pal[0x200];
DECLARE_READ8_MEMBER(palette_low_r);
DECLARE_READ8_MEMBER(palette_high_r);
DECLARE_WRITE8_MEMBER(palette_low_w);
DECLARE_WRITE8_MEMBER(palette_high_w);
void set_palette(int offset);
DECLARE_DRIVER_INIT(mjsenpu);
virtual void machine_start() override;
@ -44,14 +52,47 @@ public:
};
READ8_MEMBER(mjsenpu_state::palette_low_r)
{
return m_pal[(offset * 2) + 0];
}
READ8_MEMBER(mjsenpu_state::palette_high_r)
{
return m_pal[(offset * 2) + 1];
}
void mjsenpu_state::set_palette(int offset)
{
UINT16 paldata = (m_pal[(offset * 2) + 0] << 8) | (m_pal[(offset * 2) + 1]);
m_palette->set_pen_color(offset, pal5bit(paldata >> 0), pal5bit(paldata >> 5), pal6bit(paldata >> 10));
}
WRITE8_MEMBER(mjsenpu_state::palette_low_w)
{
m_pal[(offset * 2)+0] = data;
set_palette(offset);
}
WRITE8_MEMBER(mjsenpu_state::palette_high_w)
{
m_pal[(offset * 2)+1] = data;
set_palette(offset);
}
static ADDRESS_MAP_START( mjsenpu_32bit_map, AS_PROGRAM, 32, mjsenpu_state )
AM_RANGE(0x00000000, 0x003fffff) AM_RAM
AM_RANGE(0x40000000, 0x401fffff) AM_ROM AM_REGION("user2",0) // main game rom
AM_RANGE(0x80000000, 0x8001ffff) AM_RAM AM_SHARE("vram")
AM_RANGE(0xffc00000, 0xffc000ff) AM_RAM
AM_RANGE(0xffd00000, 0xffd000ff) AM_RAM
AM_RANGE(0xffc00000, 0xffc000ff) AM_READWRITE8(palette_low_r, palette_low_w, 0xffffffff)
AM_RANGE(0xffd00000, 0xffd000ff) AM_READWRITE8(palette_high_r, palette_high_w, 0xffffffff)
AM_RANGE(0xffe00000, 0xffe0ffff) AM_RAM
@ -107,6 +148,7 @@ UINT32 mjsenpu_state::screen_update_mjsenpu(screen_device &screen, bitmap_ind16
void mjsenpu_state::machine_start()
{
save_item(NAME(m_pal));
}
void mjsenpu_state::machine_reset()
@ -141,8 +183,7 @@ static MACHINE_CONFIG_START( mjsenpu, mjsenpu_state )
MCFG_SCREEN_UPDATE_DRIVER(mjsenpu_state, screen_update_mjsenpu)
MCFG_SCREEN_PALETTE("palette")
MCFG_PALETTE_ADD("palette", 0x1000)
MCFG_PALETTE_FORMAT(BBBBBGGGGGGRRRRR)
MCFG_PALETTE_ADD("palette", 0x100)
MCFG_SPEAKER_STANDARD_MONO("mono")