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// license:BSD-3-Clause
// copyright-holders:Ariane Fugmann
#ifndef MAME_MACHINE_M1COMM_H
#define MAME_MACHINE_M1COMM_H
#pragma once
#define M1COMM_SIMULATION
#include "osdfile.h"
#include "cpu/z80/z80.h"
#include "machine/am9517a.h"
#include "machine/mb89374.h"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
class m1comm_device : public device_t
{
public:
// construction/destruction
m1comm_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
// public API - stuff that gets called from the model1
// shared memory 4k
// reads/writes at I/O 0xB00xxx
uint8_t share_r(offs_t offset);
void share_w(offs_t offset, uint8_t data);
// single bit registers (74LS74)
// reads/writes at I/O 0xB01000
uint8_t cn_r();
void cn_w(uint8_t data);
// reads/writes at I/O 0xB01002
uint8_t fg_r();
void fg_w(uint8_t data);
// IRQ logic - 5 = VINT, 7 = DLC
void check_vint_irq();
void m1comm_io(address_map &map);
void m1comm_mem(address_map &map);
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
virtual void device_reset_after_children() override;
virtual const tiny_rom_entry *device_rom_region() const override;
// optional information overrides
virtual void device_add_mconfig(machine_config &config) override;
private:
required_device<z80_device> m_cpu;
required_device<am9517a_device> m_dma;
required_device<mb89374_device> m_dlc;
// MB89374 handler
DECLARE_WRITE_LINE_MEMBER(dlc_int7_w);
// MB89237A handler
DECLARE_WRITE_LINE_MEMBER(dma_hreq_w);
uint8_t dma_mem_r(offs_t offset);
void dma_mem_w(offs_t offset, uint8_t data);
// single bit registers (74LS74)
uint8_t syn_r();
void syn_w(uint8_t data);
uint8_t zfg_r();
void zfg_w(uint8_t data);
// shared memory 4k
// reads/writes at 0xC000-FFFF
// - share_r
// - share_w
uint8_t m_shared[0x1000]{}; // 2x 2k = 4k; model1 accesses this with 16bit data and 11bit address (A0 to A10)
uint8_t m_syn = 0; // bit0 is used to trigger DOP line on VINT, bit1 is used to enable/disable VINT/IRQ5
uint8_t m_zfg = 0; // z80 flip gate, bit0 is stored
uint8_t m_cn = 0; // bit0 is used to enable/disable the comm board
uint8_t m_fg = 0; // flip gate, bit0 is stored, bit7 is connected to ZFG bit 0
#ifdef M1COMM_SIMULATION
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[0x200]{};
uint8_t m_buffer1[0x200]{};
uint8_t m_framesync;
uint8_t m_linkenable = 0;
uint16_t m_linktimer = 0;
uint8_t m_linkalive = 0;
uint8_t m_linkid = 0;
uint8_t m_linkcount = 0;
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);
#endif
};
// device type definition
DECLARE_DEVICE_TYPE(M1COMM, m1comm_device)
#endif // MAME_MACHINE_M1COMM_H
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