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/**********************************************************************
DEC VT Terminal video emulation
[ DC012 and DC011 emulation ]
01/05/2009 Initial implementation [Miodrag Milanovic]
Copyright MESS Team.
Visit http://mamedev.org for licensing and usage restrictions.
**********************************************************************/
#ifndef __VT_VIDEO__
#define __VT_VIDEO__
#include "emu.h"
struct vt_video_interface
{
const char *m_char_rom_tag; /* character rom region */
/* this gets called for every memory read */
devcb_read8 m_in_ram_cb;
devcb_write8 m_clear_video_cb;
};
class vt100_video_device : public device_t,
public device_video_interface,
public vt_video_interface
{
public:
vt100_video_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);
vt100_video_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
~vt100_video_device() {}
DECLARE_READ8_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:
// device-level overrides
virtual void device_config_complete();
virtual void device_start();
virtual void device_reset();
// internal state
void recompute_parameters();
virtual void display_char(bitmap_ind16 &bitmap, UINT8 code, int x, int y, UINT8 scroll_region, UINT8 display_type);
TIMER_CALLBACK_MEMBER(lba7_change);
devcb_resolved_read8 m_in_ram_func;
devcb_resolved_write8 m_clear_video_interrupt;
UINT8 *m_gfx; /* content of char rom */
int m_lba7;
bool DEC_MHFU;
// dc012 attributes
UINT8 m_scroll_latch;
UINT8 m_blink_flip_flop;
UINT8 m_reverse_field;
UINT8 m_basic_attribute;
// dc011 attributes
UINT8 m_columns;
UINT8 m_height;
UINT8 m_height_MAX;
UINT8 m_skip_lines;
UINT8 m_frequency;
UINT8 m_interlaced;
};
class rainbow_video_device : public vt100_video_device
{
public:
rainbow_video_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
virtual void video_update(bitmap_ind16 &bitmap, const rectangle &cliprect);
virtual void video_blanking(bitmap_ind16 &bitmap, const rectangle &cliprect);
int dc012_MHFU();
void palette_select(int choice);
protected:
virtual void display_char(bitmap_ind16 &bitmap, UINT8 code, int x, int y, UINT8 scroll_region, UINT8 display_type);
virtual void device_reset();
};
extern const device_type VT100_VIDEO;
extern const device_type RAINBOW_VIDEO;
#define MCFG_VT100_VIDEO_ADD(_tag, _intrf) \
MCFG_DEVICE_ADD(_tag, VT100_VIDEO, 0) \
MCFG_DEVICE_CONFIG(_intrf)
#define MCFG_RAINBOW_VIDEO_ADD(_tag, _intrf) \
MCFG_DEVICE_ADD(_tag, RAINBOW_VIDEO, 0) \
MCFG_DEVICE_CONFIG(_intrf)
#endif
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