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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************
Mullard SAA5050 Teletext Character Generator emulation
**********************************************************************
_____ _____
Vss 1 |* \_/ | 28 DE
_SI 2 | | 27 PO
_DATA 3 | | 26 LOSE
D1 4 | SAA5050 | 25 BLAN
D2 5 | SAA5051 | 24 R
D3 6 | SAA5052 | 23 G
D4 7 | SAA5053 | 22 B
D5 8 | SAA5054 | 21 Y
D6 9 | SAA5055 | 20 F1
D7 10 | SAA5056 | 19 TR6
DLIM 11 | SAA5057 | 18 Vdd
_GLR 12 | | 17 N/C
DEW 13 | | 16 _TLC
CRS 14 |_____________| 15 _BCS
**********************************************************************/
#pragma once
#ifndef __SAA5050__
#define __SAA5050__
#include "emu.h"
//**************************************************************************
// INTERFACE CONFIGURATION MACROS
//**************************************************************************
#define MCFG_SAA5050_D_CALLBACK(_read) \
devcb = &saa5050_device::set_d_rd_callback(*device, DEVCB_##_read);
#define MCFG_SAA5050_SCREEN_SIZE(_cols, _rows, _size) \
saa5050_device::static_set_screen_size(*device, _cols, _rows, _size);
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> saa5050_device
class saa5050_device : public device_t
{
public:
// construction/destruction
saa5050_device(const machine_config &mconfig, device_type type, const char *name, std::string tag, device_t *owner, UINT32 clock, const char *shortname, const char *source);
saa5050_device(const machine_config &mconfig, std::string tag, device_t *owner, UINT32 clock);
static void static_set_screen_size(device_t &device, int cols, int rows, int size) { downcast<saa5050_device &>(device).m_cols = cols; downcast<saa5050_device &>(device).m_rows = rows; downcast<saa5050_device &>(device).m_size = size; }
template<class _Object> static devcb_base &set_d_rd_callback(device_t &device, _Object object) { return downcast<saa5050_device &>(device).m_read_d.set_callback(object); }
// optional information overrides
virtual const rom_entry *device_rom_region() const override;
DECLARE_WRITE_LINE_MEMBER( crs_w );
DECLARE_WRITE_LINE_MEMBER( dew_w );
DECLARE_WRITE_LINE_MEMBER( lose_w );
void write(UINT8 data);
DECLARE_WRITE_LINE_MEMBER( f1_w );
DECLARE_WRITE_LINE_MEMBER( tr6_w );
int get_rgb();
// NOTE: the following are provided for convenience only, SAA5050 is not a display controller
// this emulates the common setup where bit 7 of data inverts the display, and the
// bottom half of a double height row gets the same character data as the top half
UINT32 screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
private:
enum
{
NUL = 0,
ALPHA_RED,
ALPHA_GREEN,
ALPHA_YELLOW,
ALPHA_BLUE,
ALPHA_MAGENTA,
ALPHA_CYAN,
ALPHA_WHITE,
FLASH,
STEADY,
END_BOX,
START_BOX,
NORMAL_HEIGHT,
DOUBLE_HEIGHT,
S0,
S1,
DLE,
GRAPHICS_RED,
GRAPHICS_GREEN,
GRAPHICS_YELLOW,
GRAPHICS_BLUE,
GRAPHICS_MAGENTA,
GRAPHICS_CYAN,
GRAPHICS_WHITE,
CONCEAL_DISPLAY,
CONTIGUOUS_GFX,
SEPARATED_GFX,
ESC,
BLACK_BACKGROUND,
NEW_BACKGROUND,
HOLD_GRAPHICS,
RELEASE_GRAPHICS
};
void process_control_character(UINT8 data);
void set_next_chartype();
UINT16 get_gfx_data(UINT8 data, offs_t row, bool separated);
UINT16 get_rom_data(UINT8 data, offs_t row);
UINT16 character_rounding(UINT16 a, UINT16 b);
void get_character_data(UINT8 data);
required_region_ptr<UINT8> m_char_rom;
devcb_read8 m_read_d;
UINT8 m_code;
UINT8 m_held_char;
UINT8 m_next_chartype;
UINT8 m_curr_chartype;
UINT8 m_held_chartype;
UINT16 m_char_data;
int m_bit;
rgb_t m_color;
int m_crs;
int m_ra;
int m_bg;
int m_fg;
int m_prev_col;
bool m_graphics;
bool m_separated;
bool m_flash;
bool m_boxed;
bool m_double_height;
bool m_double_height_old;
bool m_double_height_bottom_row;
bool m_double_height_prev_row;
bool m_hold_char;
bool m_hold_clear;
bool m_hold_off;
int m_frame_count;
int m_cols;
int m_rows;
int m_size;
};
// ======================> saa5051_device
class saa5051_device : public saa5050_device
{
public:
// construction/destruction
saa5051_device(const machine_config &mconfig, std::string tag, device_t *owner, UINT32 clock);
// optional information overrides
virtual const rom_entry *device_rom_region() const override;
};
// ======================> saa5052_device
class saa5052_device : public saa5050_device
{
public:
// construction/destruction
saa5052_device(const machine_config &mconfig, std::string tag, device_t *owner, UINT32 clock);
// optional information overrides
virtual const rom_entry *device_rom_region() const override;
};
// ======================> saa5053_device
class saa5053_device : public saa5050_device
{
public:
// construction/destruction
saa5053_device(const machine_config &mconfig, std::string tag, device_t *owner, UINT32 clock);
// optional information overrides
virtual const rom_entry *device_rom_region() const override;
};
// ======================> saa5054_device
class saa5054_device : public saa5050_device
{
public:
// construction/destruction
saa5054_device(const machine_config &mconfig, std::string tag, device_t *owner, UINT32 clock);
// optional information overrides
virtual const rom_entry *device_rom_region() const override;
};
// ======================> saa5055_device
class saa5055_device : public saa5050_device
{
public:
// construction/destruction
saa5055_device(const machine_config &mconfig, std::string tag, device_t *owner, UINT32 clock);
// optional information overrides
virtual const rom_entry *device_rom_region() const override;
};
// ======================> saa5056_device
class saa5056_device : public saa5050_device
{
public:
// construction/destruction
saa5056_device(const machine_config &mconfig, std::string tag, device_t *owner, UINT32 clock);
// optional information overrides
virtual const rom_entry *device_rom_region() const override;
};
// ======================> saa5057_device
class saa5057_device : public saa5050_device
{
public:
// construction/destruction
saa5057_device(const machine_config &mconfig, std::string tag, device_t *owner, UINT32 clock);
// optional information overrides
virtual const rom_entry *device_rom_region() const override;
};
// device type definition
extern const device_type SAA5050; // English
extern const device_type SAA5051; // German
extern const device_type SAA5052; // Swedish/Finnish
extern const device_type SAA5053; // Italian
extern const device_type SAA5054; // Belgian
extern const device_type SAA5055; // US ASCII
extern const device_type SAA5056; // Hebrew
extern const device_type SAA5057; // Cyrillic
#endif
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