/*************************************************************************** National Semiconductor INS8154 N-Channel 128-by-8 Bit RAM Input/Output (RAM I/O) _____ _____ PB6 1 |* \_/ | 40 VCC PB5 2 | | 39 PB7 PB4 3 | | 38 NWDS PB3 4 | | 37 NRDS PB2 5 | | 36 NRST PB1 6 | | 35 _CS0 PB0 7 | | 34 CS1 DB7 8 | | 33 M/_IO DB6 9 | | 32 AD6 DB5 10 | INS8154 | 31 AD5 DB4 11 | | 30 AD4 DB3 12 | | 29 AD3 DB2 13 | | 28 AD2 DB1 14 | | 27 AD1 DB0 15 | | 26 AD0 PA7 16 | | 25 INTR PA6 17 | | 24 PA0 PA5 18 | | 23 PA1 PA4 19 | | 22 PA2 GND 20 |_____________| 21 PA3 ***************************************************************************/ #pragma once #ifndef __INS8154_H__ #define __INS8154_H__ #include "emu.h" /*************************************************************************** DEVICE CONFIGURATION MACROS ***************************************************************************/ #define MCFG_INS8154_ADD(_tag, _intrf) \ MCFG_DEVICE_ADD(_tag, INS8154, 0) \ MCFG_DEVICE_CONFIG(_intrf) /*************************************************************************** TYPE DEFINITIONS ***************************************************************************/ // ======================> ins8154_interface struct ins8154_interface { devcb_read8 m_in_a_cb; devcb_write8 m_out_a_cb; devcb_read8 m_in_b_cb; devcb_write8 m_out_b_cb; devcb_write_line m_out_irq_cb; }; // ======================> ins8154_device class ins8154_device : public device_t, public ins8154_interface { public: // construction/destruction ins8154_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); DECLARE_READ8_MEMBER( ins8154_r ); DECLARE_WRITE8_MEMBER( ins8154_w ); DECLARE_WRITE8_MEMBER( ins8154_porta_w ); DECLARE_WRITE8_MEMBER( ins8154_portb_w ); 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() { } private: /* i/o lines */ devcb_resolved_read8 m_in_a_func; devcb_resolved_write8 m_out_a_func; devcb_resolved_read8 m_in_b_func; devcb_resolved_write8 m_out_b_func; devcb_resolved_write_line m_out_irq_func; /* registers */ UINT8 m_in_a; /* Input Latch Port A */ UINT8 m_in_b; /* Input Latch Port B */ UINT8 m_out_a; /* Output Latch Port A */ UINT8 m_out_b; /* Output Latch Port B */ UINT8 m_mdr; /* Mode Definition Register */ UINT8 m_odra; /* Output Definition Register Port A */ UINT8 m_odrb; /* Output Definition Register Port B */ }; // device type definition extern const device_type INS8154; #endif /* __INS8154_H__ */