diff options
Diffstat (limited to 'src/devices/bus/bbc/rom/slot.h')
-rw-r--r-- | src/devices/bus/bbc/rom/slot.h | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/src/devices/bus/bbc/rom/slot.h b/src/devices/bus/bbc/rom/slot.h new file mode 100644 index 00000000000..40818d9e619 --- /dev/null +++ b/src/devices/bus/bbc/rom/slot.h @@ -0,0 +1,155 @@ +// license:BSD-3-Clause +// copyright-holders:Nigel Barnes +/********************************************************************* + + BBC Micro ROM slot emulation + +*********************************************************************/ + +#ifndef MAME_BUS_BBC_ROM_SLOT_H +#define MAME_BUS_BBC_ROM_SLOT_H + +#pragma once + +#include "softlist_dev.h" + + +#define BBC_ROM_REGION_TAG ":cart:rom" + +/*************************************************************************** + TYPE DEFINITIONS +***************************************************************************/ + +// ======================> bbc_romslot_device + +class device_bbc_rom_interface; + +class bbc_romslot_device : public device_t, + public device_image_interface, + public device_slot_interface +{ +public: + // image-level overrides + virtual image_init_result call_load() override; + virtual void call_unload() override; + virtual const software_list_loader &get_software_list_loader() const override { return rom_software_list_loader::instance(); } + + virtual iodevice_t image_type() const override { return IO_ROM; } + virtual bool is_readable() const override { return 1; } + virtual bool is_writeable() const override { return 0; } + virtual bool is_creatable() const override { return 0; } + virtual bool must_be_loaded() const override { return 0; } + virtual bool is_reset_on_load() const override { return 1; } + virtual const char *image_interface() const override { return "bbc_rom"; } + virtual const char *file_extensions() const override { return "rom,bin"; } + + // slot interface overrides + virtual std::string get_default_card_software(get_default_card_software_hook &hook) const override; + + // reading and writing + uint8_t read(offs_t offset); + void write(offs_t offset, uint8_t data); + + uint32_t get_rom_size(); + uint32_t get_slot_size() const { return m_slot_size; } + +protected: + // construction/destruction + bbc_romslot_device(const machine_config &mconfig, device_type type, char const *tag, device_t *owner, uint32_t clock); + + // device-level overrides + virtual void device_start() override; + + uint32_t m_slot_size; + +private: + device_bbc_rom_interface* m_cart; +}; + +// ======================> bbc_romslot16_device + +class bbc_romslot16_device : public bbc_romslot_device +{ +public: + // construction/destruction + template <typename T> + bbc_romslot16_device(machine_config const &mconfig, char const *tag, device_t *owner, T &&slot_options, char const *default_option) + : bbc_romslot16_device(mconfig, tag, owner) + { + option_reset(); + slot_options(*this); + set_default_option(default_option); + set_fixed(false); + m_slot_size = 0x4000; + } + + bbc_romslot16_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock = 0); +}; + +// ======================> bbc_romslot32_device + +class bbc_romslot32_device : public bbc_romslot_device +{ +public: + // construction/destruction + template <typename T> + bbc_romslot32_device(machine_config const &mconfig, char const *tag, device_t *owner, T &&slot_options, char const *default_option) + : bbc_romslot32_device(mconfig, tag, owner) + { + option_reset(); + slot_options(*this); + set_default_option(default_option); + set_fixed(false); + m_slot_size = 0x8000; + } + + bbc_romslot32_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock = 0); +}; + + +// ======================> device_bbc_rom_interface + +class device_bbc_rom_interface : public device_slot_card_interface +{ +public: + // construction/destruction + virtual ~device_bbc_rom_interface(); + + // reading and writing + virtual uint8_t read(offs_t offset) { return 0xff; } + virtual void write(offs_t offset, uint8_t data) { m_device.logerror("unhandled ROM write to %04X = %02X\n", offset | 0x8000, data); } + + void rom_alloc(uint32_t size, const char *tag); + void ram_alloc(uint32_t size); + void nvram_alloc(uint32_t size); + + uint8_t* get_rom_base() { return m_rom; } + virtual uint32_t get_rom_size() { return m_rom_size; } + + uint8_t* get_ram_base() { return &m_ram[0]; } + uint32_t get_ram_size() { return m_ram.size(); } + + uint8_t* get_nvram_base() { return &m_nvram[0]; } + uint32_t get_nvram_size() { return m_nvram.size(); } + +protected: + device_bbc_rom_interface(const machine_config &mconfig, device_t &device); + + bbc_romslot_device *m_slot; + +private: + // internal state + uint8_t *m_rom; + uint32_t m_rom_size; + std::vector<uint8_t> m_ram; + std::vector<uint8_t> m_nvram; +}; + + +// device type definition +DECLARE_DEVICE_TYPE(BBC_ROMSLOT16, bbc_romslot16_device) +DECLARE_DEVICE_TYPE(BBC_ROMSLOT32, bbc_romslot32_device) + +void bbc_rom_devices(device_slot_interface &device); + +#endif // MAME_BUS_BBC_ROM_SLOT_H |