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// license:BSD-3-Clause
// copyright-holders:Aaron Giles
/**********************************************************************
TI TMS9927 and compatible CRT controller emulation
**********************************************************************/
#ifndef MAME_VIDEO_TMS9927_H
#define MAME_VIDEO_TMS9927_H
class tms9927_device : public device_t, public device_video_interface
{
public:
tms9927_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
auto vsyn_callback() { return m_write_vsyn.bind(); }
auto hsyn_callback() { return m_write_hsyn.bind(); }
void set_char_width(int pixels) { m_hpixels_per_column = pixels; }
void set_region_tag(const char *tag) { m_selfload.set_tag(tag); }
void set_overscan(int left, int right, int top, int bottom) {
m_overscan_left = left;
m_overscan_right = right;
m_overscan_top = top;
m_overscan_bottom = bottom;
}
void set_visarea(s16 minx, s16 maxx, s16 miny, s16 maxy) { m_custom_visarea.set(minx, maxx, miny, maxy); }
void write(offs_t offset, uint8_t data);
uint8_t read(offs_t offset);
int bl_r();
bool screen_reset() const { return m_reset; }
int upscroll_offset() const { return m_start_datarow; }
bool cursor_bounds(rectangle &bounds) const;
protected:
tms9927_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock);
// device-level overrides
virtual void device_start() override;
virtual void device_stop() override;
virtual void device_reset() override;
virtual void device_clock_changed() override;
virtual void device_post_load() override;
TIMER_CALLBACK_MEMBER(toggle_vsync);
TIMER_CALLBACK_MEMBER(toggle_hsync);
private:
void recompute_parameters(bool postload);
void generic_access(offs_t offset);
devcb_write_line m_write_vsyn;
devcb_write_line m_write_hsyn;
int m_hpixels_per_column; /* number of pixels per video memory address */
uint16_t m_overscan_left;
uint16_t m_overscan_right;
uint16_t m_overscan_top;
uint16_t m_overscan_bottom;
// internal state
optional_region_ptr<uint8_t> m_selfload;
/* live state */
uint8_t m_reg[9];
uint8_t m_start_datarow;
bool m_reset;
bool m_vsyn;
bool m_hsyn;
/* derived state; no need to save */
bool m_valid_config;
uint16_t m_total_hpix, m_total_vpix;
uint16_t m_visible_hpix, m_visible_vpix;
rectangle m_custom_visarea;
uint16_t m_vsyn_start, m_vsyn_end;
uint16_t m_hsyn_start, m_hsyn_end;
emu_timer *m_vsync_timer;
emu_timer *m_hsync_timer;
};
class crt5027_device : public tms9927_device
{
public:
crt5027_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
};
class crt5037_device : public tms9927_device
{
public:
crt5037_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
};
class crt5057_device : public tms9927_device
{
public:
crt5057_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
};
DECLARE_DEVICE_TYPE(TMS9927, tms9927_device)
DECLARE_DEVICE_TYPE(CRT5027, crt5027_device)
DECLARE_DEVICE_TYPE(CRT5037, crt5037_device)
DECLARE_DEVICE_TYPE(CRT5057, crt5057_device)
#endif // MAME_VIDEO_TMS9927_H
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