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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 "osdcore.h"
#include "cpu/z80/z80.h"
#include "machine/am9517a.h"
#include "machine/mb89374.h"
#define M1COMM_TAG "m1comm"
#define M1COMM_CPU_REGION "m1comm:commcpu"
#define MCFG_M1COMM_ADD(_tag ) \
MCFG_DEVICE_ADD(_tag, M1COMM, 0)
//**************************************************************************
// 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
DECLARE_READ8_MEMBER(share_r);
DECLARE_WRITE8_MEMBER(share_w);
// single bit registers (74LS74)
// reads/writes at I/O 0xB01000
DECLARE_READ8_MEMBER(cn_r);
DECLARE_WRITE8_MEMBER(cn_w);
// reads/writes at I/O 0xB01002
DECLARE_READ8_MEMBER(fg_r);
DECLARE_WRITE8_MEMBER(fg_w);
// 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);
DECLARE_READ8_MEMBER(dma_mem_r);
DECLARE_WRITE8_MEMBER(dma_mem_w);
// single bit registers (74LS74)
DECLARE_READ8_MEMBER(syn_r);
DECLARE_WRITE8_MEMBER(syn_w);
DECLARE_READ8_MEMBER(zfg_r);
DECLARE_WRITE8_MEMBER(zfg_w);
// 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; // bit0 is used to trigger DOP line on VINT, bit1 is used to enable/disable VINT/IRQ5
uint8_t m_zfg; // z80 flip gate, bit0 is stored
uint8_t m_cn; // bit0 is used to enable/disable the comm board
uint8_t m_fg; // 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;
uint16_t m_linktimer;
uint8_t m_linkalive;
uint8_t m_linkid;
uint8_t m_linkcount;
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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