// license:BSD-3-Clause // copyright-holders:AJR #ifndef MAME_MACHINE_MACSCSI_H #define MAME_MACHINE_MACSCSI_H #pragma once class mac_scsi_helper_device : public device_t { public: // device type constructor mac_scsi_helper_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock = 0); // callback configuration auto scsi_read_callback() { return m_scsi_read_callback.bind(); } auto scsi_write_callback() { return m_scsi_write_callback.bind(); } auto scsi_dma_read_callback() { return m_scsi_dma_read_callback.bind(); } auto scsi_dma_write_callback() { return m_scsi_dma_write_callback.bind(); } auto cpu_halt_callback() { return m_cpu_halt_callback.bind(); } auto timeout_error_callback() { return m_timeout_error_callback.bind(); } // miscellaneous configuration void set_timeout(attotime timeout) { m_timeout = timeout; } // read/write handlers u8 read_wrapper(bool pseudo_dma, offs_t offset); void write_wrapper(bool pseudo_dma, offs_t offset, u8 data); DECLARE_WRITE_LINE_MEMBER(drq_w); protected: // device-level overrides virtual void device_resolve_objects() override; virtual void device_start() override; virtual void device_reset() override; private: enum class mode : u8 { NON_DMA, READ_WAIT_DRQ, READ_DMA, WRITE_DMA, BAD_DMA }; // internal helpers void read_fifo_process(); void write_fifo_process(); TIMER_CALLBACK_MEMBER(timer_callback); void dma_stop(); // callback objects devcb_read8 m_scsi_read_callback; devcb_write8 m_scsi_write_callback; devcb_read8 m_scsi_dma_read_callback; devcb_write8 m_scsi_dma_write_callback; devcb_write_line m_cpu_halt_callback; devcb_write8 m_timeout_error_callback; // misc. parameters attotime m_timeout; // internal state emu_timer *m_pseudo_dma_timer; mode m_mode; u8 m_read_fifo_bytes; u8 m_write_fifo_bytes; u32 m_read_fifo_data; u32 m_write_fifo_data; }; // device type declaration DECLARE_DEVICE_TYPE(MAC_SCSI_HELPER, mac_scsi_helper_device) #endif // MAME_MACHINE_MACSCSI_H