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// license:BSD-3-Clause
// copyright-holders:Ariane Fugmann
#pragma once
#ifndef __M1COMM_H__
#define __M1COMM_H__
#define __M1COMM_SIMULATION__
#include "emu.h"
#include "cpu/z80/z80.h"
#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 clock);
// optional information overrides
virtual machine_config_constructor device_mconfig_additions() const;
required_device<z80_device> m_commcpu;
// internal API - stuff that happens on the comm board
// MB89374 registers
DECLARE_READ8_MEMBER(dlc_reg_r);
DECLARE_WRITE8_MEMBER(dlc_reg_w);
// MB89237A registers
DECLARE_READ8_MEMBER(dma_reg_r);
DECLARE_WRITE8_MEMBER(dma_reg_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
DECLARE_READ8_MEMBER(share_r);
DECLARE_WRITE8_MEMBER(share_w);
// public API - stuff that gets called from the model1
// shared memory 4k
// reads/writes at I/O 0xB00xxx
// - share_r
// - 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();
protected:
// device-level overrides
virtual void device_start();
virtual void device_reset();
virtual const rom_entry *device_rom_region() const;
private:
UINT8 m_shared[0x1000]; // 2x 2k = 4k; model1 accesses this with 16bit data and 11bit address (A0 to A10)
UINT8 m_dlc_reg[0x20]; // MB89374 registers
UINT8 m_dma_reg[0x20]; // MB89237A registers
UINT8 m_syn; // bit0 is stored; purpose unknown, bit1 is used to enable/disable VINT/IRQ5
UINT8 m_zfg; // z80 flip gate? purpose unknown, bit0 is stored
UINT8 m_cn; // bit0 is used to enable/disable the comm board
UINT8 m_fg; // flip gate? purpose unknown, bit0 is stored, bit7 is connected to ZFG bit 0
emu_file m_line_rx; // rx line - can be either differential, simple serial or toslink
emu_file m_line_tx; // tx line - is differential, simple serial and toslink
char m_localhost[256];
char m_remotehost[256];
UINT8 m_buffer[0x1000];
#ifdef __M1COMM_SIMULATION__
UINT8 m_linkenable;
UINT16 m_linktimer;
UINT8 m_linkalive;
UINT8 m_linkid;
UINT8 m_linkcount;
void comm_tick();
#endif
};
// device type definition
extern const device_type M1COMM;
#endif /* __M1COMM_H__ */
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