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Diffstat (limited to 'src/devices/bus/bbc/internal/stl4m32.h')
-rw-r--r-- | src/devices/bus/bbc/internal/stl4m32.h | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/src/devices/bus/bbc/internal/stl4m32.h b/src/devices/bus/bbc/internal/stl4m32.h new file mode 100644 index 00000000000..e919dbf35f3 --- /dev/null +++ b/src/devices/bus/bbc/internal/stl4m32.h @@ -0,0 +1,67 @@ +// license:BSD-3-Clause +// copyright-holders:Nigel Barnes +/********************************************************************** + + Solidisk Fourmeg RAM/ROM Expansions + + http://chrisacorns.computinghistory.org.uk/8bit_Upgrades/Solidisk_4Meg.html + +**********************************************************************/ + + +#ifndef MAME_BUS_BBC_INTERNAL_STL4M32_H +#define MAME_BUS_BBC_INTERNAL_STL4M32_H + +#include "internal.h" + + +//************************************************************************** +// TYPE DEFINITIONS +//************************************************************************** + +class bbc_stl4m32_device : + public device_t, + public device_bbc_internal_interface +{ +public: + // construction/destruction + bbc_stl4m32_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); + + DECLARE_INPUT_CHANGED_MEMBER(clock_switch); + +protected: + // device-level overrides + virtual void device_start() override ATTR_COLD; + virtual void device_reset() override ATTR_COLD; + + // optional information overrides + virtual void device_add_mconfig(machine_config &config) override ATTR_COLD; + virtual ioport_constructor device_input_ports() const override ATTR_COLD; + virtual const tiny_rom_entry *device_rom_region() const override ATTR_COLD; + + virtual bool overrides_rom() override { return true; } + virtual bool overrides_ram() override { return true; } + virtual bool overrides_mos() override { return true; } + virtual uint8_t ram_r(offs_t offset) override; + virtual void ram_w(offs_t offset, uint8_t data) override; + virtual void romsel_w(offs_t offset, uint8_t data) override; + virtual uint8_t paged_r(offs_t offset) override; + virtual void paged_w(offs_t offset, uint8_t data) override; + virtual uint8_t mos_r(offs_t offset) override; + virtual void mos_w(offs_t offset, uint8_t data) override; + + optional_device_array<bbc_romslot_device, 16> m_rom; + + std::unique_ptr<uint8_t[]> m_ram; + + uint8_t m_romsel; + uint8_t m_ramsel; + uint8_t m_shadow; +}; + + +// device type definition +DECLARE_DEVICE_TYPE(BBC_STL4M32, bbc_stl4m32_device); + + +#endif /* MAME_BUS_BBC_INTERNAL_STL4M32_H */ |