// license:BSD-3-Clause // copyright-holders:R. Belmont /********************************************************************* a2scsi.h Implementation of the Apple II SCSI Card *********************************************************************/ #ifndef MAME_BUS_A2BUS_A2SCSI_H #define MAME_BUS_A2BUS_A2SCSI_H #pragma once #include "a2bus.h" #include "machine/ncr5380n.h" //************************************************************************** // TYPE DEFINITIONS //************************************************************************** class a2bus_scsi_device: public device_t, public device_a2bus_card_interface { public: // construction/destruction a2bus_scsi_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); DECLARE_WRITE_LINE_MEMBER( drq_w ); protected: a2bus_scsi_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock); virtual void device_start() override; virtual void device_reset() override; virtual void device_add_mconfig(machine_config &config) override; virtual const tiny_rom_entry *device_rom_region() const override; // overrides of standard a2bus slot functions virtual uint8_t read_c0nx(uint8_t offset) override; virtual void write_c0nx(uint8_t offset, uint8_t data) override; virtual uint8_t read_cnxx(uint8_t offset) override; virtual void write_cnxx(uint8_t offset, uint8_t data) override; virtual uint8_t read_c800(uint16_t offset) override; virtual void write_c800(uint16_t offset, uint8_t data) override; required_device m_ncr5380; required_device m_scsibus; private: uint8_t *m_rom; uint8_t m_ram[8192]; // 8 banks of 1024 bytes int m_rambank, m_rombank; uint8_t m_drq; uint8_t m_bank; bool m_816block; }; // device type definition DECLARE_DEVICE_TYPE(A2BUS_SCSI, a2bus_scsi_device) #endif // MAME_BUS_A2BUS_A2SCSI_H