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Diffstat (limited to 'src/devices/machine/psion_asic4.h')
-rw-r--r-- | src/devices/machine/psion_asic4.h | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/src/devices/machine/psion_asic4.h b/src/devices/machine/psion_asic4.h new file mode 100644 index 00000000000..8e181291987 --- /dev/null +++ b/src/devices/machine/psion_asic4.h @@ -0,0 +1,59 @@ +// license:BSD-3-Clause +// copyright-holders:Nigel Barnes +/****************************************************************************** + + Psion ASIC4 + +******************************************************************************/ + +#ifndef MAME_MACHINE_PSION_ASIC4_H +#define MAME_MACHINE_PSION_ASIC4_H + +#pragma once + + +//************************************************************************** +// TYPE DEFINITIONS +//************************************************************************** + +// ======================> psion_asic4_device + +class psion_asic4_device : public device_t, public device_memory_interface +{ +public: + psion_asic4_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock = 0); + + void set_ext_info_byte(uint16_t info) { m_info_byte = info; } + + void data_w(uint16_t data); + uint8_t data_r(); + +protected: + // device_t overrides + virtual void device_start() override ATTR_COLD; + virtual void device_reset() override ATTR_COLD; + + // device_memory_interface overrides + virtual space_config_vector memory_space_config() const override; + +private: + address_space_config m_space_config; + + address_space *m_space; + + static constexpr uint16_t NULL_FRAME = 0x000; + static constexpr uint16_t CONTROL_FRAME = 0x100; + static constexpr uint16_t DATA_FRAME = 0x200; + + uint32_t m_addr_latch; + uint8_t m_addr_writes; + + uint16_t m_info_byte; + uint8_t m_sibo_control; +}; + + +// device type definition +DECLARE_DEVICE_TYPE(PSION_ASIC4, psion_asic4_device) + +#endif // MAME_MACHINE_PSION_ASIC4_H |