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Diffstat (limited to 'src/devices/bus/electron/mc68k.h')
-rw-r--r-- | src/devices/bus/electron/mc68k.h | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/src/devices/bus/electron/mc68k.h b/src/devices/bus/electron/mc68k.h new file mode 100644 index 00000000000..a95223a3f93 --- /dev/null +++ b/src/devices/bus/electron/mc68k.h @@ -0,0 +1,63 @@ +// license:BSD-3-Clause +// copyright-holders:Nigel Barnes +/********************************************************************** + + Electron 68000 Expansion + +**********************************************************************/ + +#ifndef MAME_BUS_ELECTRON_MC68K_M +#define MAME_BUS_ELECTRON_MC68K_M + +#pragma once + +#include "exp.h" +#include "cpu/m68000/m68000.h" +#include "machine/6821pia.h" +#include "machine/ram.h" + + +//************************************************************************** +// TYPE DEFINITIONS +//************************************************************************** + +class electron_mc68k_device: + public device_t, + public device_electron_expansion_interface +{ +public: + // construction/destruction + electron_mc68k_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); + +protected: + // device-level overrides + virtual void device_start() override; + virtual void device_reset() override; + + // optional information overrides + virtual void device_add_mconfig(machine_config &config) override; + virtual const tiny_rom_entry *device_rom_region() const override; + + virtual u8 expbus_r(offs_t offset) override; + virtual void expbus_w(offs_t offset, u8 data) override; + +private: + required_device<m68000_base_device> m_maincpu; + required_device<ram_device> m_ram; + required_device_array<pia6821_device, 2> m_pia; + required_memory_region m_boot_rom; + required_memory_region m_exp_rom; + + memory_passthrough_handler *m_rom_shadow_tap; + + void mem_map(address_map &map); + + u8 m_romsel; +}; + + +// device type definition +DECLARE_DEVICE_TYPE(ELECTRON_MC68K, electron_mc68k_device) + + +#endif // MAME_BUS_ELECTRON_MC68K_M |