// license:BSD-3-Clause // copyright-holders:Nigel Barnes /********************************************************************** Ralph Allen Colour VDU Card **********************************************************************/ #ifndef MAME_BUS_TANBUS_RAVDU_H #define MAME_BUS_TANBUS_RAVDU_H #pragma once #include "bus/tanbus/tanbus.h" #include "video/saa5050.h" #include "video/mc6845.h" #include "screen.h" //************************************************************************** // TYPE DEFINITIONS //************************************************************************** class tanbus_ravdu_device : public device_t, public device_tanbus_interface { public: static constexpr feature_type imperfect_features() { return feature::GRAPHICS; } // construction/destruction tanbus_ravdu_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); protected: // device-level overrides virtual void device_start() override; virtual void device_reset() override; // optional information overrides virtual void device_add_mconfig(machine_config &config) override; virtual uint8_t read(offs_t offset, int inhrom, int inhram, int be) override; virtual void write(offs_t offset, uint8_t data, int inhrom, int inhram, int be) override; virtual void set_inhibit_lines(offs_t offset, int &inhram, int &inhrom) override; private: uint8_t videoram_r(offs_t offset); MC6845_UPDATE_ROW(crtc_update_row); DECLARE_WRITE_LINE_MEMBER(vsync_changed); required_device m_screen; required_device m_crtc; required_device m_trom; std::unique_ptr m_videoram; }; // device type definition DECLARE_DEVICE_TYPE(TANBUS_RAVDU, tanbus_ravdu_device) #endif // MAME_BUS_TANBUS_RAVDU_H