// license:BSD-3-Clause // copyright-holders:Robbbert /*************************************************************************** Intel 8279 Programmable Keyboard/Display Interface emulation **************************************************************************** _____ _____ RL2 1 |* \_/ | 40 Vcc RL3 2 | | 39 RL1 CLK 3 | | 38 RL0 IRQ 4 | | 37 CNTL/STB RL4 5 | | 36 SHIFT RL5 6 | | 35 SL3 RL6 7 | | 34 SL2 RL7 8 | | 33 SL1 RESET 9 | | 32 SL0 /RD 10 | 8279 | 31 OUT B0 /WR 11 | | 30 OUT B1 DB0 12 | | 29 OUT B2 DB1 13 | | 28 OUT B3 DB2 14 | | 27 OUT A0 DB3 15 | | 26 OUT A1 DB4 16 | | 25 OUT A2 DB5 17 | | 24 OUT A3 DB6 18 | | 23 /BD DB7 19 | | 22 /CS Vss 20 |_____________| 21 A0 (CTRL/DATA) ***************************************************************************/ #ifndef MAME_MACHINE_I8279_H #define MAME_MACHINE_I8279_H #pragma once /*************************************************************************** DEVICE CONFIGURATION MACROS ***************************************************************************/ #define MCFG_I8279_OUT_IRQ_CB(_devcb) \ devcb = &downcast(*device).set_out_irq_callback(DEVCB_##_devcb); #define MCFG_I8279_OUT_SL_CB(_devcb) \ devcb = &downcast(*device).set_out_sl_callback(DEVCB_##_devcb); #define MCFG_I8279_OUT_DISP_CB(_devcb) \ devcb = &downcast(*device).set_out_disp_callback(DEVCB_##_devcb); #define MCFG_I8279_OUT_BD_CB(_devcb) \ devcb = &downcast(*device).set_out_bd_callback(DEVCB_##_devcb); #define MCFG_I8279_IN_RL_CB(_devcb) \ devcb = &downcast(*device).set_in_rl_callback(DEVCB_##_devcb); #define MCFG_I8279_IN_SHIFT_CB(_devcb) \ devcb = &downcast(*device).set_in_shift_callback(DEVCB_##_devcb); #define MCFG_I8279_IN_CTRL_CB(_devcb) \ devcb = &downcast(*device).set_in_ctrl_callback(DEVCB_##_devcb); /*************************************************************************** TYPE DEFINITIONS ***************************************************************************/ // ======================> i8279_device class i8279_device : public device_t { public: // construction/destruction i8279_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); template devcb_base &set_out_irq_callback(Object &&cb) { return m_out_irq_cb.set_callback(std::forward(cb)); } template devcb_base &set_out_sl_callback(Object &&cb) { return m_out_sl_cb.set_callback(std::forward(cb)); } template devcb_base &set_out_disp_callback(Object &&cb) { return m_out_disp_cb.set_callback(std::forward(cb)); } template devcb_base &set_out_bd_callback(Object &&cb) { return m_out_bd_cb.set_callback(std::forward(cb)); } template devcb_base &set_in_rl_callback(Object &&cb) { return m_in_rl_cb.set_callback(std::forward(cb)); } template devcb_base &set_in_shift_callback(Object &&cb) { return m_in_shift_cb.set_callback(std::forward(cb)); } template devcb_base &set_in_ctrl_callback(Object &&cb) { return m_in_ctrl_cb.set_callback(std::forward(cb)); } // read & write handlers DECLARE_READ8_MEMBER(read); DECLARE_READ8_MEMBER(status_r); DECLARE_READ8_MEMBER(data_r); DECLARE_WRITE8_MEMBER(write); DECLARE_WRITE8_MEMBER(cmd_w); DECLARE_WRITE8_MEMBER(data_w); void timer_mainloop(); protected: // device-level overrides virtual void device_start() override; virtual void device_reset() override; virtual void device_post_load() override { } virtual void device_clock_changed() override { } TIMER_CALLBACK_MEMBER( timerproc_callback ); private: void timer_adjust(); void clear_display(); void new_key(uint8_t data, bool skey, bool ckey); void new_fifo(uint8_t data); void set_irq(bool state); devcb_write_line m_out_irq_cb; // IRQ devcb_write8 m_out_sl_cb; // Scanlines SL0-3 devcb_write8 m_out_disp_cb; // Display outputs B0-3, A0-3 devcb_write_line m_out_bd_cb; // BD devcb_read8 m_in_rl_cb; // kbd readlines RL0-7 devcb_read_line m_in_shift_cb; // Shift key devcb_read_line m_in_ctrl_cb; // Ctrl-Strobe line emu_timer *m_timer; uint8_t m_d_ram[16]; // display ram uint8_t m_d_ram_ptr; uint8_t m_s_ram[8]; // might be same as fifo ram uint8_t m_s_ram_ptr; uint8_t m_fifo[8]; // queued keystrokes uint8_t m_cmd[8]; // Device settings uint8_t m_status; // Returned via status_r uint32_t m_clock; // Internal scan clock uint8_t m_scanner; // next output on SL lines bool m_autoinc; // auto-increment flag bool m_read_flag; // read from where bool m_ctrl_key; // previous state of strobe input uint16_t m_key_down; }; // device type definition DECLARE_DEVICE_TYPE(I8279, i8279_device) #endif // MAME_MACHINE_I8279_H