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/***************************************************************************
fixfreq.h
Fixed frequency monochrome monitor emulation
The driver is intended for drivers which provide an analog video signal.
VSYNC and HSYNC levels are used to create the bitmap.
***************************************************************************/
#ifndef FIXFREQ_H
#define FIXFREQ_H
#include "emu.h"
#include "machine/netlist.h"
#define FIXFREQ_INTERFACE(name) \
const fixedfreq_interface (name) =
#define MCFG_FIXFREQ_ADD(_tag, _screen_tag, _config) \
MCFG_SCREEN_ADD(_screen_tag, RASTER) \
MCFG_SCREEN_RAW_PARAMS(13500000, 858, 0, 858, 525, 0, 525) \
MCFG_SCREEN_UPDATE_DEVICE(_tag, fixedfreq_device, screen_update) \
MCFG_DEVICE_ADD(_tag, FIXFREQ, 0) \
MCFG_VIDEO_SET_SCREEN(_screen_tag) \
MCFG_DEVICE_CONFIG(_config)
struct fixedfreq_interface {
UINT32 m_monitor_clock;
int m_hvisible;
int m_hfrontporch;
int m_hsync;
int m_hbackporch;
int m_vvisible;
int m_vfrontporch;
int m_vsync;
int m_vbackporch;
int m_fieldcount;
double m_sync_threshold;
};
extern fixedfreq_interface fixedfreq_mode_ntsc704;
extern fixedfreq_interface fixedfreq_mode_ntsc720;
// ======================> vga_device
class fixedfreq_device : public device_t,
public device_video_interface,
public fixedfreq_interface
{
public:
// construction/destruction
fixedfreq_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
fixedfreq_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname, const char *source);
virtual UINT32 screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
NETDEV_ANALOG_CALLBACK_MEMBER(update_vid);
protected:
// device-level overrides
virtual void device_config_complete();
virtual void device_start();
virtual void device_reset();
virtual void device_post_load();
//virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
void recompute_parameters(bool postload);
void update_screen_parameters(attotime refresh);
private:
int sync_separator(attotime time, double newval);
int m_htotal;
int m_vtotal;
double m_vid;
int m_last_x;
int m_last_y;
attotime m_last_time;
attotime m_line_time;
attotime m_last_hsync_time;
attotime m_last_vsync_time;
attotime m_refresh;
attotime m_clock_period;
bitmap_rgb32 *m_bitmap[2];
int m_cur_bm;
/* sync separator */
double m_vint;
double m_int_trig;
double m_mult;
int m_sig_vsync;
int m_sig_composite;
int m_sig_field;
protected:
};
// device type definition
extern const device_type FIXFREQ;
#endif /* FIXFREQ_H */
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