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// license:BSD-3-Clause
// copyright-holders:Ariane Fugmann
#ifndef MAME_MACHINE_S32COMM_H
#define MAME_MACHINE_S32COMM_H
#pragma once
#define S32COMM_SIMULATION
#include "osdcore.h"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
class s32comm_device : public device_t
{
public:
// construction/destruction
s32comm_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
// single bit registers (74LS74)
uint8_t zfg_r(offs_t offset);
void zfg_w(uint8_t data);
// shared memory 2k
uint8_t share_r(offs_t offset);
void share_w(offs_t offset, uint8_t data);
// public API - stuff that gets called from host
// shared memory 2k
// reads/writes at I/O 0x800xxx
// - share_r
// - share_w
// single bit registers (74LS74)
// reads/writes at I/O 0x801000
uint8_t cn_r();
void cn_w(uint8_t data);
// reads/writes at I/O 0x801002
uint8_t fg_r();
void fg_w(uint8_t data);
// IRQ logic - 5 = VINT, 7 = DLC
void check_vint_irq();
#ifdef S32COMM_SIMULATION
void set_linktype(uint16_t linktype);
#endif
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
// optional information overrides
virtual void device_add_mconfig(machine_config &config) override;
private:
uint8_t m_shared[0x800]; // 2k shared memory
uint8_t m_zfg; // z80 flip gate? purpose unknown, bit0 is stored
uint8_t m_cn; // bit0 is used to enable/disable the comm board
uint8_t m_fg; // flip gate? purpose unknown, 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[0x100];
uint8_t m_buffer1[0x100];
uint8_t m_framesync;
#ifdef S32COMM_SIMULATION
uint8_t m_linkenable;
uint16_t m_linktimer;
uint8_t m_linkalive;
uint8_t m_linkid;
uint8_t m_linkcount;
uint16_t m_linktype;
void comm_tick();
int read_frame(int dataSize);
void send_data(uint8_t frameType, int frameStart, int frameSize, int dataSize);
void send_frame(int dataSize);
void comm_tick_14084();
void comm_tick_15033();
void comm_tick_15612();
#endif
};
// device type definition
DECLARE_DEVICE_TYPE(S32COMM, s32comm_device)
#endif // MAME_MACHINE_S32COMM_H
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