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// license:LGPL-2.1+
// copyright-holders:Angelo Salese
/***************************************************************************
Seibu CRTC device
***************************************************************************/
#ifndef MAME_VIDEO_SEIBU_CRTC_H
#define MAME_VIDEO_SEIBU_CRTC_H
#pragma once
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> seibu_crtc_device
class seibu_crtc_device : public device_t,
public device_memory_interface,
public device_video_interface
{
public:
// construction/destruction
seibu_crtc_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
auto decrypt_key_callback() { return m_decrypt_key_cb.bind(); }
auto layer_en_callback() { return m_layer_en_cb.bind(); }
auto layer_scroll_callback() { return m_layer_scroll_cb.bind(); }
auto reg_1a_callback() { return m_reg_1a_cb.bind(); }
auto layer_scroll_base_callback() { return m_layer_scroll_base_cb.bind(); }
// I/O operations
DECLARE_WRITE16_MEMBER( write );
DECLARE_WRITE16_MEMBER( write_alt );
DECLARE_READ16_MEMBER( read );
DECLARE_READ16_MEMBER( read_alt );
DECLARE_WRITE16_MEMBER(decrypt_key_w);
DECLARE_WRITE16_MEMBER(layer_en_w);
DECLARE_READ16_MEMBER(reg_1a_r);
DECLARE_WRITE16_MEMBER(reg_1a_w);
DECLARE_WRITE16_MEMBER(layer_scroll_w);
DECLARE_WRITE16_MEMBER(layer_scroll_base_w);
void seibu_crtc_vregs(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:
devcb_write16 m_decrypt_key_cb;
devcb_write16 m_layer_en_cb;
devcb_write16 m_layer_scroll_cb;
devcb_write16 m_reg_1a_cb;
devcb_write16 m_layer_scroll_base_cb;
const address_space_config m_space_config;
inline uint16_t read_word(offs_t address);
inline void write_word(offs_t address, uint16_t data);
uint16_t m_reg_1a;
};
// device type definition
DECLARE_DEVICE_TYPE(SEIBU_CRTC, seibu_crtc_device)
#endif // MAME_VIDEO_SEIBU_CRTC_H
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