// license:BSD-3-Clause // copyright-holders:Ariane Fugmann #ifndef MAME_MACHINE_M2COMM_H #define MAME_MACHINE_M2COMM_H #pragma once #define M2COMM_SIMULATION #include "osdcore.h" //************************************************************************** // TYPE DEFINITIONS //************************************************************************** class m2comm_device : public device_t { public: // construction/destruction m2comm_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); // single bit registers (74LS74) DECLARE_READ8_MEMBER(zfg_r); DECLARE_WRITE8_MEMBER(zfg_w); // shared memory 16k (these are actually 2x 16k bank switched) DECLARE_READ8_MEMBER(share_r); DECLARE_WRITE8_MEMBER(share_w); // public API - stuff that gets called from host // shared memory 16k // reads/writes at I/O 0x01a10000-0x01a13fff // - share_r // - share_w // single bit registers (74LS74) // reads/writes at I/O 0x01a14000 DECLARE_READ8_MEMBER(cn_r); DECLARE_WRITE8_MEMBER(cn_w); // reads/writes at I/O 0x01a14002 DECLARE_READ8_MEMBER(fg_r); DECLARE_WRITE8_MEMBER(fg_w); // IRQ logic - 5 = VINT, 7 = DLC void check_vint_irq(); void set_frameoffset(uint16_t offset) { m_frameoffset = offset; }; protected: // device-level overrides virtual void device_start() override; virtual void device_reset() override; virtual void device_add_mconfig(machine_config &config) override; private: uint8_t m_shared[0x4000]; // 16k shared memory uint8_t m_zfg; // z80 flip gate - bit 0 switches memory banks, bit7 is connected to FG bit 0 uint8_t m_cn; // bit0 is used to enable/disable the comm board uint8_t m_fg; // i960 flip gate - bit0 is stored, bit7 is connected to ZFG bit 0 osd_file::ptr m_line_rx; // rx line - can be either differential, simple serial or toslink osd_file::ptr m_line_tx; // tx line - is differential, simple serial and toslink char m_localhost[256]; char m_remotehost[256]; uint8_t m_buffer0[0x1000]; uint8_t m_buffer1[0x1000]; uint8_t m_framesync; uint16_t m_frameoffset; #ifdef M2COMM_SIMULATION uint8_t m_linkenable; uint16_t m_linktimer; uint8_t m_linkalive; uint8_t m_linkid; uint8_t m_linkcount; uint8_t m_zfg_delay; void comm_tick(); void read_fg(); int read_frame(int dataSize); void send_data(uint8_t frameType, int frameStart, int frameSize, int dataSize); void send_frame(int dataSize); #endif }; // device type definition DECLARE_DEVICE_TYPE(M2COMM, m2comm_device) #endif // MAME_MACHINE_M2COMM_H