// license:BSD-3-Clause // copyright-holders:Curt Coder /********************************************************************** Intel 8355 - 16,384-Bit ROM with I/O emulation ********************************************************************** _____ _____ _CE1 1 |* \_/ | 40 Vcc CE2 2 | | 39 PB7 CLK 3 | | 38 PB6 RESET 4 | | 37 PB5 N.C. 5 | | 36 PB4 READY 6 | | 35 PB3 IO/_M 7 | | 34 PB2 _IOR 8 | | 33 PB1 _RD 9 | | 32 PB0 _IOW 10 | 8355 | 31 PA7 ALE 11 | 8355-2 | 30 PA6 AD0 12 | | 29 PA5 AD1 13 | | 28 PA4 AD2 14 | | 27 PA3 AD3 15 | | 26 PA2 AD4 16 | | 25 PA1 AD5 17 | | 24 PA0 AD6 18 | | 23 A10 AD7 19 | | 22 A9 Vss 20 |_____________| 21 A8 **********************************************************************/ #ifndef MAME_MACHINE_I8355_H #define MAME_MACHINE_I8355_H #pragma once class i8355_device : public device_t { public: // construction/destruction i8355_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); auto in_pa() { return m_in_pa_cb.bind(); } auto out_pa() { return m_out_pa_cb.bind(); } auto in_pb() { return m_in_pb_cb.bind(); } auto out_pb() { return m_out_pb_cb.bind(); } DECLARE_READ8_MEMBER( io_r ); DECLARE_WRITE8_MEMBER( io_w ); DECLARE_READ8_MEMBER( memory_r ); protected: // device-level overrides virtual void device_start() override; virtual void device_reset() override; inline uint8_t read_port(int port); inline void write_port(int port, uint8_t data); private: devcb_read8 m_in_pa_cb; devcb_write8 m_out_pa_cb; devcb_read8 m_in_pb_cb; devcb_write8 m_out_pb_cb; // registers uint8_t m_output[2]; // output latches uint8_t m_ddr[2]; // DDR latches // internal ROM required_region_ptr m_rom; }; // device type definition DECLARE_DEVICE_TYPE(I8355, i8355_device) #endif // MAME_MACHINE_I8355_H