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-rw-r--r--src/devices/bus/bbc/internal/peartree.h116
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diff --git a/src/devices/bus/bbc/internal/peartree.h b/src/devices/bus/bbc/internal/peartree.h
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+++ b/src/devices/bus/bbc/internal/peartree.h
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+// license:BSD-3-Clause
+// copyright-holders:Nigel Barnes
+/**********************************************************************
+
+ Peartree MRxx00 ROM/RAM Boards
+
+ http://chrisacorns.computinghistory.org.uk/8bit_Upgrades/Peartree_ROMExpansion.html
+
+**********************************************************************/
+
+
+#ifndef MAME_BUS_BBC_INTERNAL_PEARTREE_H
+#define MAME_BUS_BBC_INTERNAL_PEARTREE_H
+
+#include "internal.h"
+
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+class bbc_mr3000_device :
+ public device_t,
+ public device_bbc_internal_interface
+{
+public:
+ // construction/destruction
+ bbc_mr3000_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+protected:
+ bbc_mr3000_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock);
+
+ // device-level overrides
+ virtual void device_start() override;
+
+ // optional information overrides
+ virtual void device_add_mconfig(machine_config &config) override;
+
+ optional_device_array<bbc_romslot_device, 16> m_rom;
+
+ virtual bool overrides_rom() override { return true; }
+ virtual void romsel_w(offs_t offset, uint8_t data) override { m_romsel = data & 0x0f; }
+ virtual uint8_t paged_r(offs_t offset) override;
+ virtual void paged_w(offs_t offset, uint8_t data) override;
+
+ uint8_t m_romsel;
+};
+
+
+class bbc_mr4200_device : public bbc_mr3000_device
+{
+public:
+ // construction/destruction
+ bbc_mr4200_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+protected:
+ // optional information overrides
+ virtual void device_add_mconfig(machine_config &config) override;
+ virtual ioport_constructor device_input_ports() const override;
+
+ required_ioport m_wp;
+
+ virtual void paged_w(offs_t offset, uint8_t data) override;
+};
+
+
+class bbc_mr4300_device :
+ public device_t,
+ public device_bbc_internal_interface
+{
+public:
+ // construction/destruction
+ bbc_mr4300_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+protected:
+ bbc_mr4300_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock);
+
+ // device-level overrides
+ virtual void device_start() override;
+
+ // optional information overrides
+ virtual void device_add_mconfig(machine_config &config) override;
+ virtual ioport_constructor device_input_ports() const override;
+
+ optional_device_array<bbc_romslot_device, 16> m_rom;
+ required_ioport m_wp;
+
+ virtual bool overrides_rom() override { return true; }
+ virtual void romsel_w(offs_t offset, uint8_t data) override { m_romsel = data & 0x0f; }
+ virtual uint8_t paged_r(offs_t offset) override;
+ virtual void paged_w(offs_t offset, uint8_t data) override;
+
+ uint8_t m_romsel;
+};
+
+
+class bbc_mr4800_device : public bbc_mr4300_device
+{
+public:
+ // construction/destruction
+ bbc_mr4800_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+protected:
+ // optional information overrides
+ virtual void device_add_mconfig(machine_config &config) override;
+};
+
+
+// device type definition
+DECLARE_DEVICE_TYPE(BBC_MR3000, bbc_mr3000_device);
+DECLARE_DEVICE_TYPE(BBC_MR4200, bbc_mr4200_device);
+DECLARE_DEVICE_TYPE(BBC_MR4300, bbc_mr4300_device);
+DECLARE_DEVICE_TYPE(BBC_MR4800, bbc_mr4800_device);
+
+
+#endif /* MAME_BUS_BBC_INTERNAL_PEARTREE_H */