// license:BSD-3-Clause // copyright-holders:R. Belmont /* * ncr5394/5396.h SCSI controller * */ #ifndef _NCR539x_H_ #define _NCR539x_H_ #include "legscsi.h" //// 539x registers //enum //{ //}; // device stuff #define MCFG_NCR539X_OUT_IRQ_CB(_devcb) \ devcb = &ncr539x_device::set_out_irq_callback(*device, DEVCB_##_devcb); #define MCFG_NCR539X_OUT_DRQ_CB(_devcb) \ devcb = &ncr539x_device::set_out_drq_callback(*device, DEVCB_##_devcb); class ncr539x_device : public legacy_scsi_host_adapter { public: // construction/destruction ncr539x_device(const machine_config &mconfig, std::string tag, device_t *owner, UINT32 clock); template static devcb_base &set_out_irq_callback(device_t &device, _Object object) { return downcast(device).m_out_irq_cb.set_callback(object); } template static devcb_base &set_out_drq_callback(device_t &device, _Object object) { return downcast(device).m_out_drq_cb.set_callback(object); } // our API DECLARE_READ8_MEMBER(read); DECLARE_WRITE8_MEMBER(write); void dma_read_data(int bytes, UINT8 *pData); void dma_write_data(int bytes, UINT8 *pData); 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; private: void fifo_write(UINT8 data); void check_fifo_executable(); void exec_fifo(); void update_fifo_internal_state(int bytes); UINT32 m_xfer_count; UINT32 m_dma_size; UINT8 m_command; UINT8 m_last_id; UINT8 m_timeout; UINT8 m_sync_xfer_period; UINT8 m_sync_offset; UINT8 m_control1, m_control2, m_control3, m_control4; UINT8 m_clock_factor; UINT8 m_forced_test; UINT8 m_data_alignment; bool m_selected; bool m_chipid_available, m_chipid_lock; static const int m_fifo_size = 16; UINT8 m_fifo_ptr, m_fifo_read_ptr, m_fifo[m_fifo_size]; //int m_xfer_remaining; // amount in the FIFO when we're in data in phase // read-only registers UINT8 m_status, m_irq_status, m_internal_state, m_fifo_internal_state; static const int m_buffer_size = 2048; UINT8 m_buffer[m_buffer_size]; int m_buffer_offset, m_buffer_remaining, m_total_data; emu_timer *m_operation_timer; devcb_write_line m_out_irq_cb; /* IRQ line */ devcb_write_line m_out_drq_cb; /* DRQ line */ }; // device type definition extern const device_type NCR539X; #endif