// license:BSD-3-Clause // copyright-holders:Patrick Mackinlay #ifndef MAME_VIDEO_BT431_H #define MAME_VIDEO_BT431_H #pragma once class bt431_device : public device_t { public: bt431_device(machine_config const &mconfig, char const *tag, device_t *owner, u32 clock); enum register_number : unsigned { REG_COMMAND = 0, REG_CURSOR_X_LO = 1, REG_CURSOR_X_HI = 2, REG_CURSOR_Y_LO = 3, REG_CURSOR_Y_HI = 4, REG_WINDOW_X_LO = 5, REG_WINDOW_X_HI = 6, REG_WINDOW_Y_LO = 7, REG_WINDOW_Y_HI = 8, REG_WINDOW_W_LO = 9, REG_WINDOW_W_HI = 10, REG_WINDOW_H_LO = 11, REG_WINDOW_H_HI = 12, }; enum command_mask : u8 { CR_D1D0 = 0x03, // cross hair cursor thickness CR_D3D2 = 0x0c, // multiplex control CR_D4 = 0x10, // cursor format control CR_D5 = 0x20, // cross hair cursor enable CR_D6 = 0x40, // 64x64 cursor enable CR_WM = 0x7f, // write mask }; enum cr_d1d0_mask : u8 { CR_D1D0_1PIX = 0x00, // 1 pixel CR_D1D0_3PIX = 0x01, // 3 pixels CR_D1D0_5PIX = 0x02, // 5 pixels CR_D1D0_7PIX = 0x03, // 7 pixels }; enum cr_d3d2_mask : u8 { CR_D3D2_11 = 0x00, // 1:1 multiplexing CR_D3D2_41 = 0x04, // 4:1 multiplexing CR_D3D2_51 = 0x08, // 5:1 multiplexing }; void map(address_map &map); bool cur_r(unsigned x, unsigned y) const; protected: static constexpr u16 ADDRESS_MASK = 0x01ff; // device_t overrides virtual void device_start() override; virtual void device_reset() override; template u8 addr_r() { return m_address >> S; } template void addr_w(u8 data) { m_address = ((m_address & (0xff00 >> S)) | (u16(data) << S)) & ADDRESS_MASK; } u8 ram_r(); void ram_w(u8 data); u8 reg_r(); void reg_w(u8 data); private: void update(); // registers u16 m_address; u8 m_command; u16 m_cursor_x; u16 m_cursor_y; u16 m_window_x; u16 m_window_y; u16 m_window_w; u16 m_window_h; u8 m_ram[512]; rectangle m_bm_window; rectangle m_ch_h; rectangle m_ch_v; }; DECLARE_DEVICE_TYPE(BT431, bt431_device) #endif // MAME_VIDEO_BT431_H