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// license:GPL-2.0+
// copyright-holders:Miodrag Milanovic,Karl-Ludwig Deisenhofer
/**********************************************************************
DEC VT Terminal video emulation
[ DC012 and DC011 emulation ]
01/05/2009 Initial implementation [Miodrag Milanovic]
**********************************************************************/
#ifndef MAME_VIDEO_VTVIDEO_H
#define MAME_VIDEO_VTVIDEO_H
#pragma once
class vt100_video_device : public device_t,
public device_video_interface
{
public:
vt100_video_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
template <class Object> devcb_base &set_ram_rd_callback(Object &&cb) { return m_read_ram.set_callback(std::forward<Object>(cb)); }
template <class Object> devcb_base &set_vert_freq_intr_wr_callback(Object &&cb) { return m_write_vert_freq_intr.set_callback(std::forward<Object>(cb)); }
template <class Object> devcb_base &set_lba7_wr_callback(Object &&cb) { return m_write_lba7.set_callback(std::forward<Object>(cb)); }
void set_chargen_tag(const char *tag) { m_char_rom.set_tag(tag); }
DECLARE_READ_LINE_MEMBER(lba7_r);
DECLARE_WRITE8_MEMBER(dc012_w);
DECLARE_WRITE8_MEMBER(dc011_w);
DECLARE_WRITE8_MEMBER(brightness_w);
virtual void video_update(bitmap_ind16 &bitmap, const rectangle &cliprect);
protected:
vt100_video_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_reset() override;
virtual void device_add_mconfig(machine_config &config) override;
// internal state
void recompute_parameters();
void vblank_callback(screen_device &screen, bool state);
virtual void display_char(bitmap_ind16 &bitmap, uint8_t code, int x, int y, uint8_t scroll_region, uint8_t display_type);
TIMER_CALLBACK_MEMBER(lba7_change);
virtual void notify_vblank(bool choice) { }
devcb_read8 m_read_ram;
devcb_write_line m_write_vert_freq_intr;
devcb_write_line m_write_lba7;
int m_lba7;
bool MHFU_FLAG;
int MHFU_counter;
// dc012 attributes
uint8_t m_scroll_latch;
bool m_scroll_latch_valid;
uint8_t m_blink_flip_flop;
uint8_t m_reverse_field;
uint8_t m_basic_attribute;
// dc011 attributes
uint8_t m_columns;
uint8_t m_height;
uint8_t m_height_MAX;
uint8_t m_fill_lines;
bool m_is_50hz;
bool m_interlaced;
emu_timer * m_lba7_change_timer;
required_region_ptr<uint8_t> m_char_rom; /* character rom region */
required_device<palette_device> m_palette;
bool m_notify_vblank;
int m_last_scroll;
bool m_linedoubler;
};
class rainbow_video_device : public vt100_video_device
{
public:
rainbow_video_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
virtual void video_update(bitmap_ind16 &bitmap, const rectangle &cliprect) override;
virtual void video_blanking(bitmap_ind16 &bitmap, const rectangle &cliprect);
int MHFU(int);
void palette_select(int choice);
protected:
virtual void display_char(bitmap_ind16 &bitmap, uint8_t code, int x, int y, uint8_t scroll_region, uint8_t display_type) override;
virtual void notify_vblank(bool choice) override;
virtual void device_reset() override;
virtual void device_add_mconfig(machine_config &config) override;
};
DECLARE_DEVICE_TYPE(VT100_VIDEO, vt100_video_device)
DECLARE_DEVICE_TYPE(RAINBOW_VIDEO, rainbow_video_device)
#define MCFG_VT_SET_SCREEN MCFG_VIDEO_SET_SCREEN
#define MCFG_VT_CHARGEN(_tag) \
downcast<vt100_video_device &>(*device).set_chargen_tag("^" _tag);
#define MCFG_VT_VIDEO_RAM_CALLBACK(_read) \
devcb = &downcast<vt100_video_device &>(*device).set_ram_rd_callback(DEVCB_##_read);
#define MCFG_VT_VIDEO_VERT_FREQ_INTR_CALLBACK(_write) \
devcb = &downcast<vt100_video_device &>(*device).set_vert_freq_intr_wr_callback(DEVCB_##_write);
#define MCFG_VT_VIDEO_LBA7_CALLBACK(_write) \
devcb = &downcast<vt100_video_device &>(*device).set_lba7_wr_callback(DEVCB_##_write);
#endif // MAME_VIDEO_VTVIDEO_H
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