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// license:BSD-3-Clause
// copyright-holders:Angelo Salese
/***************************************************************************
Generic Palette RAMDAC device
***************************************************************************/
#ifndef MAME_VIDEO_RAMDAC_H
#define MAME_VIDEO_RAMDAC_H
#pragma once
#include "emupal.h"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> ramdac_device
class ramdac_device : public device_t,
public device_memory_interface
{
public:
// construction/destruction
template <typename T>
ramdac_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock, T &&palette_tag)
: ramdac_device(mconfig, tag, owner, clock)
{
m_palette.set_tag(std::forward<T>(palette_tag));
}
ramdac_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
// configuration
void set_color_base(uint32_t color_base) { m_color_base = color_base; }
void set_split_read(int split) { m_split_read_reg = split; }
// I/O operations
uint8_t index_r();
uint8_t pal_r();
uint8_t mask_r();
void index_w(uint8_t data);
void index_r_w(uint8_t data);
void pal_w(uint8_t data);
void mask_w(uint8_t data);
uint8_t ramdac_pal_r(offs_t offset);
void ramdac_rgb666_w(offs_t offset, uint8_t data);
void ramdac_rgb888_w(offs_t offset, uint8_t data);
void ramdac_palram(address_map &map);
protected:
// device-level overrides
virtual void device_validity_check(validity_checker &valid) const override;
virtual void device_start() override;
virtual void device_reset() override;
virtual space_config_vector memory_space_config() const override;
private:
uint8_t m_pal_index[2];
uint8_t m_pal_mask;
uint8_t m_int_index[2];
std::unique_ptr<uint8_t[]> m_palram;
const address_space_config m_space_config;
required_device<palette_device> m_palette;
uint32_t m_color_base;
uint8_t m_split_read_reg; // read register index is separated, seen in rltennis
inline uint8_t readbyte(offs_t address);
inline void writebyte(offs_t address, uint8_t data);
inline void reg_increment(uint8_t inc_type);
};
// device type definition
DECLARE_DEVICE_TYPE(RAMDAC, ramdac_device)
#endif // MAME_VIDEO_RAMDAC_H
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