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// license:BSD-3-Clause
// copyright-holders:Barry Rodewald
/*
* x68k_neptunex.c
*/
#include "emu.h"
#include "x68k_neptunex.h"
#include "machine/dp8390.h"
//**************************************************************************
// DEVICE DEFINITIONS
//**************************************************************************
DEFINE_DEVICE_TYPE(X68K_NEPTUNEX, x68k_neptune_device, "x68k_neptunex", "Neptune-X")
// device machine config
void x68k_neptune_device::device_add_mconfig(machine_config &config)
{
DP8390D(config, m_dp8390);
m_dp8390->irq_callback().set(FUNC(x68k_neptune_device::x68k_neptune_irq_w));
m_dp8390->mem_read_callback().set(FUNC(x68k_neptune_device::x68k_neptune_mem_read));
m_dp8390->mem_write_callback().set(FUNC(x68k_neptune_device::x68k_neptune_mem_write));
}
x68k_neptune_device::x68k_neptune_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock)
: device_t(mconfig, X68K_NEPTUNEX, tag, owner, clock)
, device_x68k_expansion_card_interface(mconfig, *this)
, m_slot(nullptr)
, m_dp8390(*this, "dp8390d")
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void x68k_neptune_device::device_start()
{
char mac[7];
uint32_t num = machine().rand();
m_slot = dynamic_cast<x68k_expansion_slot_device *>(owner());
memset(m_prom, 0x57, 16);
sprintf(mac+2, "\x1b%c%c%c", (num >> 16) & 0xff, (num >> 8) & 0xff, num & 0xff);
mac[0] = 0; mac[1] = 0; // avoid gcc warning
memcpy(m_prom, mac, 6);
m_dp8390->set_mac(mac);
m_slot->space().install_readwrite_handler(0xece000,0xece3ff, read16s_delegate(*this, FUNC(x68k_neptune_device::x68k_neptune_port_r)), write16s_delegate(*this, FUNC(x68k_neptune_device::x68k_neptune_port_w)), 0xffffffff);
}
void x68k_neptune_device::device_reset() {
memcpy(m_prom, m_dp8390->get_mac(), 6);
}
uint16_t x68k_neptune_device::x68k_neptune_port_r(offs_t offset, uint16_t mem_mask)
{
uint16_t data;
if(offset >= 0x100+32 || offset < 0x100)
return 0xffff;
if(offset < 0x100+16)
{
return (m_dp8390->cs_read(offset) << 8)|
m_dp8390->cs_read(offset+1);
}
//if(mem_mask == 0x00ff) offset++;
switch(offset)
{
case 0x100+16:
data = m_dp8390->remote_read();
data = swapendian_int16(data);
return data;
case 0x100+31:
m_dp8390->dp8390_reset(CLEAR_LINE);
return 0;
default:
logerror("x68k_neptune: invalid register read %02X\n", offset);
}
return 0;
}
void x68k_neptune_device::x68k_neptune_port_w(offs_t offset, uint16_t data, uint16_t mem_mask)
{
if(offset >= 0x100+32 || offset < 0x100)
return;
if(offset < 0x100+16)
{
if(mem_mask == 0x00ff)
{
data <<= 8;
offset++;
}
m_dp8390->cs_write(offset, data>>8);
if(mem_mask == 0xffff) m_dp8390->cs_write(offset+1, data & 0xff);
return;
}
//if(mem_mask == 0x00ff) offset++;
switch(offset)
{
case 0x100+16:
m_dp8390->remote_write(swapendian_int16(data));
return;
case 0x100+31:
m_dp8390->dp8390_reset(ASSERT_LINE);
return;
default:
logerror("x68k_neptune: invalid register write %02X\n", offset);
}
return;
}
uint8_t x68k_neptune_device::x68k_neptune_mem_read(offs_t offset)
{
if(offset < 32) return m_prom[offset>>1];
if((offset < (16*1024)) || (offset >= (32*1024)))
{
logerror("x68k_neptune: invalid memory read %04X\n", offset);
return 0xff;
}
return m_board_ram[offset - (16*1024)];
}
void x68k_neptune_device::x68k_neptune_mem_write(offs_t offset, uint8_t data)
{
if((offset < (16*1024)) || (offset >= (32*1024)))
{
logerror("x68k_neptune: invalid memory write %04X\n", offset);
return;
}
m_board_ram[offset - (16*1024)] = data;
}
WRITE_LINE_MEMBER(x68k_neptune_device::x68k_neptune_irq_w)
{
m_slot->irq2_w(state);
logerror("Neptune: IRQ2 set to %i\n",state);
}
uint8_t x68k_neptune_device::iack2()
{
return NEPTUNE_IRQ_VECTOR;
}
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