// 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
#include "emupal.h"
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);
auto ram_rd_callback() { return m_read_ram.bind(); }
auto vert_freq_intr_wr_callback() { return m_write_vert_freq_intr.bind(); }
auto lba3_lba4_wr_callback() { return m_write_lba3_lba4.bind(); }
auto lba7_wr_callback() { return m_write_lba7.bind(); }
template <typename T> void set_chargen(T &&tag) { m_char_rom.set_tag(std::forward<T>(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(lba3_change);
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_write8 m_write_lba3_lba4;
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_lba3_change_timer;
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)
#endif // MAME_VIDEO_VTVIDEO_H