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/**********************************************************************
Signetics 2636 video chip
**********************************************************************/
#ifndef __S2636_H__
#define __S2636_H__
#define S2636_IS_PIXEL_DRAWN(p) (((p) & 0x08) ? TRUE : FALSE)
#define S2636_PIXEL_COLOR(p) ((p) & 0x07)
/*************************************
*
* Device configuration macros
*
*************************************/
class s2636_device : public device_t,
public device_video_interface,
public device_sound_interface
{
public:
s2636_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
~s2636_device() {}
static void set_workram_size(device_t &device, int size) { downcast<s2636_device &>(device).m_work_ram_size = size; }
static void set_offsets(device_t &device, int y_offset, int x_offset)
{
s2636_device &dev = downcast<s2636_device &>(device);
dev.m_x_offset = x_offset;
dev.m_y_offset = y_offset;
}
// returns a BITMAP_FORMAT_IND16 bitmap the size of the screen
// D0-D2 of each pixel is the pixel color
// D3 indicates whether the S2636 drew this pixel - 0 = not drawn, 1 = drawn
bitmap_ind16 &update(const rectangle &cliprect);
DECLARE_WRITE8_MEMBER( work_ram_w );
DECLARE_READ8_MEMBER( work_ram_r );
void soundport_w(int mode, int data);
protected:
// device-level overrides
virtual void device_start();
// sound stream update overrides
virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
private:
// internal state
dynamic_buffer m_work_ram;
bitmap_ind16 m_bitmap;
bitmap_ind16 m_collision_bitmap;
sound_stream *m_channel;
UINT8 m_reg[1];
int m_size;
int m_pos;
unsigned m_level;
int m_work_ram_size;
int m_y_offset;
int m_x_offset;
int check_collision( int spriteno1, int spriteno2, const rectangle &cliprect );
};
extern const device_type S2636;
#define MCFG_S2636_OFFSETS(_yoffs, _xoffs) \
s2636_device::set_offsets(*device, _yoffs, _xoffs);
#define MCFG_S2636_WORKRAM_SIZE(_size) \
s2636_device::set_workram_size(*device, _size);
#endif /* __S2636_H__ */
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