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-rw-r--r--src/devices/bus/a2bus/sider.h77
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diff --git a/src/devices/bus/a2bus/sider.h b/src/devices/bus/a2bus/sider.h
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+// license:BSD-3-Clause
+// copyright-holders:R. Belmont
+/*********************************************************************
+
+ sider.h
+
+ Implementation of the First Class Peripherals / Advanced Tech Services / Xebec Sider SASI Card
+
+*********************************************************************/
+
+#ifndef MAME_BUS_A2BUS_SIDER_H
+#define MAME_BUS_A2BUS_SIDER_H
+
+#pragma once
+
+#include "a2bus.h"
+#include "bus/nscsi/devices.h"
+#include "machine/nscsi_bus.h"
+#include "machine/nscsi_cb.h"
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+class a2bus_sider_device:
+ public device_t,
+ public device_a2bus_card_interface
+{
+protected:
+ a2bus_sider_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;
+
+ // 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<nscsi_bus_device> m_sasibus;
+ required_device<nscsi_callback_device> m_sasi;
+ required_region_ptr<u8> m_rom;
+
+private:
+ u8 m_latch;
+ u8 m_control;
+};
+
+class a2bus_sidercard_device: public a2bus_sider_device
+{
+public:
+ a2bus_sidercard_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+ virtual const tiny_rom_entry *device_rom_region() const override;
+};
+
+class a2bus_xebeccard_device: public a2bus_sider_device
+{
+public:
+ a2bus_xebeccard_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+ virtual const tiny_rom_entry *device_rom_region() const override;
+
+ // the Xebec version of the firmware doesn't work; it appears to have some bytes corrupted.
+ static constexpr feature_type unemulated_features() { return feature::DISK; }
+
+protected:
+ virtual void device_start() override;
+};
+
+// device type definition
+DECLARE_DEVICE_TYPE(A2BUS_SIDER, a2bus_sidercard_device)
+DECLARE_DEVICE_TYPE(A2BUS_XEBEC, a2bus_xebeccard_device)
+
+#endif // MAME_BUS_A2BUS_SIDER_H