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// license:BSD-3-Clause
// copyright-holders:Paul Hampson
class vball_state : public driver_device
{
public:
vball_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag),
m_maincpu(*this, "maincpu"),
m_audiocpu(*this, "audiocpu"),
m_gfxdecode(*this, "gfxdecode"),
m_screen(*this, "screen"),
m_palette(*this, "palette"),
m_attribram(*this, "attribram"),
m_videoram(*this, "videoram"),
m_scrolly_lo(*this, "scrolly_lo"),
m_spriteram(*this, "spriteram") { }
required_device<cpu_device> m_maincpu;
required_device<cpu_device> m_audiocpu;
required_device<gfxdecode_device> m_gfxdecode;
required_device<screen_device> m_screen;
required_device<palette_device> m_palette;
required_shared_ptr<UINT8> m_attribram;
required_shared_ptr<UINT8> m_videoram;
required_shared_ptr<UINT8> m_scrolly_lo;
required_shared_ptr<UINT8> m_spriteram;
int m_scrollx_hi;
int m_scrolly_hi;
int m_scrollx_lo;
int m_gfxset;
int m_scrollx[256];
int m_bgprombank;
int m_spprombank;
tilemap_t *m_bg_tilemap;
DECLARE_WRITE8_MEMBER(irq_ack_w);
DECLARE_WRITE8_MEMBER(bankswitch_w);
DECLARE_WRITE8_MEMBER(cpu_sound_command_w);
DECLARE_WRITE8_MEMBER(scrollx_hi_w);
DECLARE_WRITE8_MEMBER(scrollx_lo_w);
DECLARE_WRITE8_MEMBER(videoram_w);
DECLARE_WRITE8_MEMBER(attrib_w);
TILEMAP_MAPPER_MEMBER(background_scan);
TILE_GET_INFO_MEMBER(get_bg_tile_info);
virtual void machine_start() override;
virtual void video_start() override;
UINT32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
TIMER_DEVICE_CALLBACK_MEMBER(vball_scanline);
void bgprombank_w(int bank);
void spprombank_w(int bank);
void draw_sprites(bitmap_ind16 &bitmap, const rectangle &cliprect);
inline int scanline_to_vcount(int scanline);
};
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