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// license:BSD-3-Clause
// copyright-holders:Chris Hardy
/***************************************************************************
Space Firebird hardware
****************************************************************************/
#include "sound/samples.h"
/*
* SPACEFB_PIXEL_CLOCK clocks the star generator circuit. The rest of
* the graphics use a clock half of SPACEFB_PIXEL_CLOCK, thus creating
* double width pixels.
*/
#define SPACEFB_MASTER_CLOCK (20160000)
#define SPACEFB_MAIN_CPU_CLOCK (6000000 / 2)
#define SPACEFB_AUDIO_CPU_CLOCK (6000000) /* this goes to X2, pixel clock goes to X1 */
#define SPACEFB_PIXEL_CLOCK (SPACEFB_MASTER_CLOCK / 2)
#define SPACEFB_HTOTAL (0x280)
#define SPACEFB_HBEND (0x000)
#define SPACEFB_HBSTART (0x200)
#define SPACEFB_VTOTAL (0x100)
#define SPACEFB_VBEND (0x010)
#define SPACEFB_VBSTART (0x0f0)
#define SPACEFB_INT_TRIGGER_COUNT_1 (0x080)
#define SPACEFB_INT_TRIGGER_COUNT_2 (0x0f0)
class spacefb_state : public driver_device
{
public:
spacefb_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_samples(*this, "samples"),
m_screen(*this, "screen"),
m_videoram(*this, "videoram") { }
required_device<cpu_device> m_maincpu;
required_device<cpu_device> m_audiocpu;
required_device<samples_device> m_samples;
required_device<screen_device> m_screen;
required_shared_ptr<UINT8> m_videoram;
UINT8 m_sound_latch;
emu_timer *m_interrupt_timer;
std::unique_ptr<UINT8[]> m_object_present_map;
UINT8 m_port_0;
UINT8 m_port_2;
UINT32 m_star_shift_reg;
double m_color_weights_rg[3];
double m_color_weights_b[2];
DECLARE_WRITE8_MEMBER(port_0_w);
DECLARE_WRITE8_MEMBER(port_1_w);
DECLARE_WRITE8_MEMBER(port_2_w);
DECLARE_READ8_MEMBER(audio_p2_r);
DECLARE_READ8_MEMBER(audio_t0_r);
DECLARE_READ8_MEMBER(audio_t1_r);
virtual void machine_start() override;
virtual void machine_reset() override;
virtual void video_start() override;
TIMER_CALLBACK_MEMBER(interrupt_callback);
void start_interrupt_timer();
UINT32 screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
inline void shift_star_generator();
void get_starfield_pens(pen_t *pens);
void draw_starfield(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
void get_sprite_pens(pen_t *pens);
void draw_bullet(offs_t offs, pen_t pen, bitmap_rgb32 &bitmap, const rectangle &cliprect, int flip);
void draw_sprite(offs_t offs, pen_t *pens, bitmap_rgb32 &bitmap, const rectangle &cliprect, int flip);
void draw_objects(bitmap_rgb32 &bitmap, const rectangle &cliprect);
protected:
enum
{
TIMER_INTERRUPT
};
virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
};
/*----------- defined in audio/spacefb.c -----------*/
MACHINE_CONFIG_EXTERN( spacefb_audio );
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