// license:BSD-3-Clause // copyright-holders:Brian Johnson /******************************************************************* * * NABU PC - NABU Network Adapter * *******************************************************************/ #ifndef MAME_BUS_NABUPC_ADAPTER_H #define MAME_BUS_NABUPC_ADAPTER_H #pragma once #include "bus/rs232/rs232.h" #include "diserial.h" namespace bus::nabupc { //************************************************************************** // TYPE DEFINITIONS //************************************************************************** /* NABU PC Network Adapter */ class network_adapter : public device_t , public device_buffered_serial_interface<16U> , public device_rs232_port_interface , public device_image_interface { public: // constructor/destructor network_adapter(machine_config const &mconfig, char const *tag, device_t *owner, u32 clock); // image-level overrides virtual bool is_readable() const noexcept override { return true; } virtual bool is_writeable() const noexcept override { return false; } virtual bool is_creatable() const noexcept override { return false; } virtual bool is_reset_on_load() const noexcept override { return false; } virtual bool core_opens_image_file() const noexcept override { return true; } virtual const char *file_extensions() const noexcept override { return "pak"; } virtual const char *image_type_name() const noexcept override { return "Segment Pak"; } virtual const char *image_brief_type_name() const noexcept override { return "hcca"; } virtual std::error_condition call_load() override; virtual DECLARE_WRITE_LINE_MEMBER(input_txd) override; protected: // device overrides virtual ioport_constructor device_input_ports() const override; virtual void device_start() override; virtual void device_reset() override; // device_buffered_serial_interface overrides virtual void tra_callback() override; private: // Serial Parameters static constexpr int START_BIT_COUNT = 1; static constexpr int DATA_BIT_COUNT = 8; static constexpr device_serial_interface::parity_t PARITY = device_serial_interface::PARITY_NONE; static constexpr device_serial_interface::stop_bits_t STOP_BITS = device_serial_interface::STOP_BITS_1; static constexpr int BAUD = 111'900; virtual void received_byte(uint8_t byte) override; void postload(); // NABU Network Segment File class segment_file { public: struct pak { uint8_t segment_id[3]; uint8_t packet_number; uint8_t owner; uint8_t tier[4]; uint8_t mbytes[2]; uint8_t type; uint8_t pak_number[2]; uint8_t offset[2]; uint8_t data[991]; uint8_t crc[2]; }; public: std::error_condition read_archive(util::core_file &stream, uint32_t segment_id); std::error_condition load(std::string_view local_path, uint32_t segment_id); const pak& operator[](const int index) const; uint32_t size() const { return pak_list.size(); } private: static constexpr uint16_t crc_table[256] = { 0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7, 0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef, 0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6, 0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de, 0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485, 0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d, 0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4, 0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc, 0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823, 0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b, 0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12, 0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a, 0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41, 0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49, 0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70, 0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78, 0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f, 0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067, 0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e, 0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256, 0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d, 0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405, 0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c, 0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634, 0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab, 0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3, 0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a, 0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92, 0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9, 0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1, 0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8, 0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0 }; std::error_condition parse_segment(char * buffer, size_t length); uint16_t update_crc(uint16_t crc, uint8_t data); uint32_t m_segment_id; std::vector pak_list; }; // State Machine enum state {START, IDLE, HEX81_REQUEST, CHANNEL_REQUEST, SEGMENT_REQUEST, SEND_SEGMENT}; TIMER_CALLBACK_MEMBER(segment_tick); void connect(uint8_t byte, bool channel_request); void idle(uint8_t byte); void channel_request(uint8_t byte); void segment_request(uint8_t byte); void hex81_request(uint8_t byte); void send_segment(uint8_t byte); void load_segment(std::string filename); required_ioport m_config; uint16_t m_channel; uint8_t m_packet; uint32_t m_segment; uint8_t m_state; uint8_t m_substate; uint16_t m_pak_offset; emu_timer *m_segment_timer; segment_file m_cache; }; } // bus::nabupc DECLARE_DEVICE_TYPE_NS(NABUPC_NETWORK_ADAPTER, bus::nabupc, network_adapter) #endif // MAME_BUS_NABUPC_ADAPTER_H