/*************************************************************************** Intel 8279 Programmable Keyboard/Display Interface emulation Copyright the MESS Team 2012. Visit http://mamedev.org for licensing and usage restrictions. **************************************************************************** _____ _____ 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 B0 /WR 11 | | 30 B1 DB0 12 | | 29 B2 DB1 13 | | 28 B3 DB2 14 | | 27 A0 DB3 15 | | 26 A1 DB4 16 | | 25 A2 DB5 17 | | 24 A3 DB6 18 | | 23 /BD DB7 19 | | 22 /CS Vss 20 |_____________| 21 CTRL/DATA ***************************************************************************/ #pragma once #ifndef __I8279__ #define __I8279__ #include "emu.h" /*************************************************************************** DEVICE CONFIGURATION MACROS ***************************************************************************/ #define MCFG_I8279_ADD(_tag, _clock, _config) \ MCFG_DEVICE_ADD(_tag, I8279, _clock) \ MCFG_DEVICE_CONFIG(_config) #define I8279_INTERFACE(_name) \ const i8279_interface (_name) = /*************************************************************************** TYPE DEFINITIONS ***************************************************************************/ // ======================> i8279_interface struct i8279_interface { devcb_write_line m_out_irq_cb; // IRQ devcb_write8 m_out_sl_cb; // Scanlines SL0-3 devcb_write8 m_out_disp_cb; // 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 }; // ======================> i8279_device class i8279_device : public device_t, public i8279_interface { public: // construction/destruction i8279_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); // read & write handlers DECLARE_READ8_MEMBER(status_r); DECLARE_READ8_MEMBER(data_r); DECLARE_WRITE8_MEMBER(cmd_w); DECLARE_WRITE8_MEMBER(data_w); void timer_mainloop(); protected: // device-level overrides virtual void device_config_complete(); virtual void device_start(); virtual void device_reset(); virtual void device_post_load() { } virtual void device_clock_changed() { } static TIMER_CALLBACK( timerproc_callback ); private: void timer_adjust(); void clear_display(); void new_key(UINT8 data, bool skey, bool ckey); void new_fifo(UINT8 data); UINT8 get_segments(); void set_irq(bool state); void set_display_mode(UINT8 data); devcb_resolved_write_line m_out_irq_func; devcb_resolved_write8 m_out_sl_func; devcb_resolved_write8 m_out_disp_func; devcb_resolved_write_line m_out_bd_func; devcb_resolved_read8 m_in_rl_func; devcb_resolved_read_line m_in_shift_func; devcb_resolved_read_line m_in_ctrl_func; emu_timer *m_timer; UINT8 m_d_ram[16]; // display ram UINT8 m_d_ram_ptr; UINT8 m_s_ram[8]; // might be same as fifo ram UINT8 m_s_ram_ptr; UINT8 m_fifo[8]; // queued keystrokes UINT8 m_cmd[8]; // Device settings UINT8 m_status; // Returned via status_r UINT32 m_clock; // Internal scan clock UINT8 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 m_key_down; }; // device type definition extern const device_type I8279; #endif