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// license:BSD-3-Clause
// copyright-holders:Carl
#include "mcd.h"
#include "coreutil.h"
DEVICE_ADDRESS_MAP_START(map, 16, mcd_isa_device)
AM_RANGE(0x0, 0x1) AM_READWRITE8(data_r, cmd_w, 0x00ff)
AM_RANGE(0x0, 0x1) AM_READWRITE8(flag_r, reset_w, 0xff00)
ADDRESS_MAP_END
static INPUT_PORTS_START( ide )
INPUT_PORTS_END
//**************************************************************************
// GLOBAL VARIABLES
//**************************************************************************
const device_type ISA16_MCD = &device_creator<mcd_isa_device>;
//-------------------------------------------------
// input_ports - device-specific input ports
//-------------------------------------------------
ioport_constructor mcd_isa_device::device_input_ports() const
{
return INPUT_PORTS_NAME( ide );
}
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// mcd_isa_device - constructor
//-------------------------------------------------
mcd_isa_device::mcd_isa_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
cdrom_image_device(mconfig, ISA16_MCD, "Mitsumi ISA CDROM Adapter", tag, owner, clock, "mcd_isa", __FILE__),
device_isa16_card_interface( mconfig, *this )
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void mcd_isa_device::device_start()
{
cdrom_image_device::device_start();
set_isa_device();
m_isa->install_device(0x0310, 0x0311, *this, &mcd_isa_device::map, 16);
}
//-------------------------------------------------
// device_reset - device-specific reset
//-------------------------------------------------
void mcd_isa_device::device_reset()
{
m_data = false;
m_stat = m_cdrom_handle ? STAT_READY : 0;
m_flag = FLAG_STAT;
m_rd_count = 0;
m_buf_count = 0;
m_curtoctrk = 1;
m_dma = 0;
m_irq = 0;
m_locked = false;
}
READ8_MEMBER(mcd_isa_device::flag_r)
{
UINT8 ret = m_flag;
m_flag = 0;
return ret;
}
READ8_MEMBER(mcd_isa_device::data_r)
{
if(!m_data)
{
if(m_buf_count)
{
m_flag = FLAG_DATA;
m_data = true;
}
return m_stat;
}
else if(m_buf_count)
{
UINT8 ret = m_buf[m_buf_idx++];
m_buf_count--;
if(m_buf_count)
m_flag = FLAG_DATA;
return ret;
}
return 0;
}
WRITE8_MEMBER(mcd_isa_device::reset_w)
{
reset();
}
WRITE8_MEMBER(mcd_isa_device::cmd_w)
{
if(m_rd_count)
{
m_rd_count--;
switch(m_cmd)
{
case CMD_SET_MODE:
m_mode = data;
m_buf[0] = 0;
m_buf_count = 1;
break;
case CMD_LOCK:
m_locked = data & 1 ? true : false;
m_buf[0] = 0;
m_buf[1] = 0;
m_buf_count = 2;
break;
case CMD_CONFIG:
switch(m_rd_count)
{
case 1:
m_conf = data;
break;
case 0:
switch(m_conf)
{
case 0x10:
m_irq = data;
break;
case 0x02:
m_dma = data;
break;
}
m_buf[0] = 0;
m_buf_count = 1;
break;
}
}
if(!m_rd_count)
{
m_data = false;
m_flag = FLAG_STAT;
m_stat = m_cdrom_handle ? STAT_READY : 0;
}
return;
}
m_cmd = data;
m_buf_idx = 0;
m_rd_count = 0;
m_buf_count = 0;
m_stat = m_cdrom_handle ? STAT_READY : 0;
switch(data)
{
case CMD_GET_INFO:
if(m_cdrom_handle)
{
UINT32 first = lba_to_msf(150), last = lba_to_msf(cdrom_get_track_start(m_cdrom_handle, 0xaa));
m_buf[0] = 1;
m_buf[1] = dec_2_bcd(cdrom_get_last_track(m_cdrom_handle));
m_buf[2] = dec_2_bcd((first >> 16) & 0xff);
m_buf[3] = dec_2_bcd((first >> 8) & 0xff);
m_buf[4] = dec_2_bcd(first & 0xff);
m_buf[5] = dec_2_bcd((last >> 16) & 0xff);
m_buf[6] = dec_2_bcd((last >> 8) & 0xff);
m_buf[7] = dec_2_bcd(last & 0xff);
m_buf[8] = 0;
m_buf_count = 9;
}
else
{
m_buf_count = 1;
m_buf[0] = 0;
m_stat = STAT_CMD_CHECK;
}
break;
case CMD_GET_Q:
if(m_cdrom_handle)
{
int tracks = cdrom_get_last_track(m_cdrom_handle);
UINT32 start = lba_to_msf(cdrom_get_track_start(m_cdrom_handle, m_curtoctrk));
UINT32 end = lba_to_msf(cdrom_get_track_start(m_cdrom_handle, m_curtoctrk < tracks ? m_curtoctrk + 1 : 0xaa));
m_buf[0] = 1; // track type?
m_buf[1] = 0; // track num except when reading toc
m_buf[2] = dec_2_bcd(m_curtoctrk); // index
m_buf[3] = dec_2_bcd((start >> 16) & 0xff);
m_buf[4] = dec_2_bcd((start >> 8) & 0xff);
m_buf[5] = dec_2_bcd(start & 0xff);
m_buf[6] = 0;
m_buf[7] = dec_2_bcd((end >> 16) & 0xff);
m_buf[8] = dec_2_bcd((end >> 8) & 0xff);
m_buf[9] = dec_2_bcd(end & 0xff);
if(m_curtoctrk >= tracks)
m_curtoctrk = 1;
m_buf_count = 10;
}
else
m_stat = STAT_CMD_CHECK;
break;
case CMD_GET_STAT:
m_buf[0] = m_stat;
m_buf_count = 1;
break;
case CMD_SET_MODE:
m_rd_count = 1;
break;
case CMD_STOPCDDA:
case CMD_STOP:
m_drvmode = DRV_MODE_STOP;
m_curtoctrk = 1;
break;
case CMD_CONFIG:
m_rd_count = 2;
break;
case CMD_READ:
m_drvmode = DRV_MODE_READ;
break;
case CMD_READCDDA:
m_drvmode = DRV_MODE_CDDA;
break;
case CMD_GET_VER:
m_buf[0] = 1; // ?
m_buf[1] = 'D';
m_buf[2] = 0;
m_buf_count = 3;
break;
case CMD_EJECT:
break;
case CMD_LOCK:
m_rd_count = 1;
break;
default:
m_stat |= STAT_CMD_CHECK;
break;
}
if(!m_rd_count)
{
m_data = false;
m_flag = FLAG_STAT;
}
}
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