// license:BSD-3-Clause // copyright-holders:Curt Coder /********************************************************************** Intel 8155/8156 - 2048-Bit Static MOS RAM with I/O Ports and Timer emulation 8156 is the same as 8155, except that chip enable is active high instead of low ********************************************************************** _____ _____ PC3 1 |* \_/ | 40 Vcc PC4 2 | | 39 PC2 TIMER IN 3 | | 38 PC1 RESET 4 | | 37 PC0 PC5 5 | | 36 PB7 _TIMER OUT 6 | | 35 PB6 IO/_M 7 | | 34 PB5 CE or _CE 8 | | 33 PB4 _RD 9 | | 32 PB3 _WR 10 | 8155 | 31 PB2 ALE 11 | 8156 | 30 PB1 AD0 12 | | 29 PB0 AD1 13 | | 28 PA7 AD2 14 | | 27 PA6 AD3 15 | | 26 PA5 AD4 16 | | 25 PA4 AD5 17 | | 24 PA3 AD6 18 | | 23 PA2 AD7 19 | | 22 PA1 Vss 20 |_____________| 21 PA0 **********************************************************************/ #pragma once #ifndef __I8155__ #define __I8155__ //************************************************************************** // INTERFACE CONFIGURATION MACROS //************************************************************************** #define MCFG_I8155_IN_PORTA_CB(_devcb) \ devcb = &i8155_device::set_in_pa_callback(*device, DEVCB_##_devcb); #define MCFG_I8155_IN_PORTB_CB(_devcb) \ devcb = &i8155_device::set_in_pb_callback(*device, DEVCB_##_devcb); #define MCFG_I8155_IN_PORTC_CB(_devcb) \ devcb = &i8155_device::set_in_pc_callback(*device, DEVCB_##_devcb); #define MCFG_I8155_OUT_PORTA_CB(_devcb) \ devcb = &i8155_device::set_out_pa_callback(*device, DEVCB_##_devcb); #define MCFG_I8155_OUT_PORTB_CB(_devcb) \ devcb = &i8155_device::set_out_pb_callback(*device, DEVCB_##_devcb); #define MCFG_I8155_OUT_PORTC_CB(_devcb) \ devcb = &i8155_device::set_out_pc_callback(*device, DEVCB_##_devcb); #define MCFG_I8155_OUT_TIMEROUT_CB(_devcb) \ devcb = &i8155_device::set_out_to_callback(*device, DEVCB_##_devcb); //************************************************************************** // TYPE DEFINITIONS //************************************************************************** // ======================> i8155_device class i8155_device : public device_t, public device_memory_interface { public: // construction/destruction i8155_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); template static devcb_base &set_in_pa_callback(device_t &device, _Object object) { return downcast(device).m_in_pa_cb.set_callback(object); } template static devcb_base &set_in_pb_callback(device_t &device, _Object object) { return downcast(device).m_in_pb_cb.set_callback(object); } template static devcb_base &set_in_pc_callback(device_t &device, _Object object) { return downcast(device).m_in_pc_cb.set_callback(object); } template static devcb_base &set_out_pa_callback(device_t &device, _Object object) { return downcast(device).m_out_pa_cb.set_callback(object); } template static devcb_base &set_out_pb_callback(device_t &device, _Object object) { return downcast(device).m_out_pb_cb.set_callback(object); } template static devcb_base &set_out_pc_callback(device_t &device, _Object object) { return downcast(device).m_out_pc_cb.set_callback(object); } template static devcb_base &set_out_to_callback(device_t &device, _Object object) { return downcast(device).m_out_to_cb.set_callback(object); } DECLARE_READ8_MEMBER( io_r ); DECLARE_WRITE8_MEMBER( io_w ); DECLARE_READ8_MEMBER( memory_r ); DECLARE_WRITE8_MEMBER( memory_w ); DECLARE_WRITE8_MEMBER( ale_w ); DECLARE_READ8_MEMBER( read ); DECLARE_WRITE8_MEMBER( write ); protected: // device-level overrides virtual void device_start() override; virtual void device_reset() override; virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override; virtual const address_space_config *memory_space_config(address_spacenum spacenum = AS_0) const override; inline uint8_t get_timer_mode(); inline void timer_output(); inline void pulse_timer_output(); inline int get_port_mode(int port); inline uint8_t read_port(int port); inline void write_port(int port, uint8_t data); void register_w(int offset, uint8_t data); private: devcb_read8 m_in_pa_cb; devcb_read8 m_in_pb_cb; devcb_read8 m_in_pc_cb; devcb_write8 m_out_pa_cb; devcb_write8 m_out_pb_cb; devcb_write8 m_out_pc_cb; // this gets called for each change of the TIMER OUT pin (pin 6) devcb_write_line m_out_to_cb; // CPU interface int m_io_m; // I/O or memory select uint8_t m_ad; // address // registers uint8_t m_command; // command register uint8_t m_status; // status register uint8_t m_output[3]; // output latches // counter uint16_t m_count_length; // count length register uint16_t m_counter; // counter register int m_to; // timer output // timers emu_timer *m_timer; // counter timer const address_space_config m_space_config; }; // device type definition extern const device_type I8155; extern const device_type I8156; #endif