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-rw-r--r--src/devices/bus/bbc/internal/internal.h117
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diff --git a/src/devices/bus/bbc/internal/internal.h b/src/devices/bus/bbc/internal/internal.h
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+// license:BSD-3-Clause
+// copyright-holders:Nigel Barnes
+/**********************************************************************
+
+ BBC Micro internal expansion boards
+
+**********************************************************************/
+
+#ifndef MAME_BUS_BBC_INTERNAL_INTERNAL_H
+#define MAME_BUS_BBC_INTERNAL_INTERNAL_H
+
+#pragma once
+
+#include "machine/ram.h"
+#include "bus/bbc/rom/slot.h"
+
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+class bbc_internal_slot_device;
+
+// ======================> device_bbc_internal_interface
+
+class device_bbc_internal_interface : public device_interface
+{
+public:
+ virtual bool overrides_ram() { return false; }
+ virtual bool overrides_rom() { return false; }
+ virtual bool overrides_mos() { return false; }
+ virtual uint8_t ram_r(offs_t offset) { return 0xff; }
+ virtual void ram_w(offs_t offset, uint8_t data) { }
+ virtual uint8_t romsel_r(offs_t offset) { return 0xfe; }
+ virtual void romsel_w(offs_t offset, uint8_t data) { }
+ virtual uint8_t paged_r(offs_t offset) { return 0xff; }
+ virtual void paged_w(offs_t offset, uint8_t data) { }
+ virtual uint8_t mos_r(offs_t offset) { return 0xff; }
+ virtual void mos_w(offs_t offset, uint8_t data) { }
+ virtual void latch_fe60_w(uint8_t data) { }
+
+ virtual void irq6502_w(int state) { }
+
+protected:
+ device_bbc_internal_interface(const machine_config &mconfig, device_t &device);
+
+ required_device<cpu_device> m_maincpu;
+ required_device<ram_device> m_mb_ram;
+ optional_device_array<bbc_romslot_device, 16> m_mb_rom;
+ required_memory_region m_region_swr;
+ required_memory_region m_region_mos;
+
+ bbc_internal_slot_device *m_slot;
+};
+
+// ======================> bbc_internal_slot_device
+
+class bbc_internal_slot_device : public device_t, public device_single_card_slot_interface<device_bbc_internal_interface>
+{
+public:
+ // construction/destruction
+ template <typename T>
+ bbc_internal_slot_device(machine_config const &mconfig, char const *tag, device_t *owner, uint32_t clock, T &&slot_options, const char *default_option)
+ : bbc_internal_slot_device(mconfig, tag, owner, clock)
+ {
+ option_reset();
+ slot_options(*this);
+ set_default_option(default_option);
+ set_fixed(false);
+ }
+
+ bbc_internal_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+ // inline configuration
+ auto irq_handler() { return m_irq_handler.bind(); }
+ auto nmi_handler() { return m_nmi_handler.bind(); }
+
+ void irq_w(int state) { m_irq_handler(state); }
+ void nmi_w(int state) { m_nmi_handler(state); }
+
+ virtual bool overrides_ram() { return m_card ? m_card->overrides_ram() : false; }
+ virtual bool overrides_rom() { return m_card ? m_card->overrides_rom() : false; }
+ virtual bool overrides_mos() { return m_card ? m_card->overrides_mos() : false; }
+ virtual uint8_t ram_r(offs_t offset);
+ virtual void ram_w(offs_t offset, uint8_t data);
+ virtual uint8_t romsel_r(offs_t offset);
+ virtual void romsel_w(offs_t offset, uint8_t data);
+ virtual uint8_t paged_r(offs_t offset);
+ virtual void paged_w(offs_t offset, uint8_t data);
+ virtual uint8_t mos_r(offs_t offset);
+ virtual void mos_w(offs_t offset, uint8_t data);
+ virtual void latch_fe60_w(uint8_t data);
+
+ virtual void irq6502_w(int state);
+
+protected:
+ // device-level overrides
+ virtual void device_start() override ATTR_COLD;
+
+ devcb_write_line m_irq_handler;
+ devcb_write_line m_nmi_handler;
+
+ uint8_t m_romsel_fe30;
+ uint8_t m_romsel_fe62;
+
+ device_bbc_internal_interface *m_card;
+};
+
+// device type definition
+DECLARE_DEVICE_TYPE(BBC_INTERNAL_SLOT, bbc_internal_slot_device)
+
+void bbcb_internal_devices(device_slot_interface &device);
+void bbcbp_internal_devices(device_slot_interface &device);
+void bbcm_internal_devices(device_slot_interface &device);
+
+
+#endif // MAME_BUS_BBC_INTERNAL_INTERNAL_H