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// license:BSD-3-Clause
// copyright-holders:Angelo Salese
/**************************************************************************************************
FDD 2DD bridge for 1st gen HW
TODO:
- support for TMSK / TTRG (sorcer cares)
**************************************************************************************************/
#include "emu.h"
#include "fdd_2dd.h"
#include "formats/img_dsk.h"
#include "formats/pc98_dsk.h"
#include "formats/pc98fdi_dsk.h"
#include "formats/fdd_dsk.h"
#include "formats/dcp_dsk.h"
#include "formats/dip_dsk.h"
#include "formats/nfd_dsk.h"
DEFINE_DEVICE_TYPE(FDD_2DD_BRIDGE, fdd_2dd_bridge_device, "pc98_fdd_2dd", "NEC PC-98 2DD FDD bridge")
fdd_2dd_bridge_device::fdd_2dd_bridge_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: device_t(mconfig, FDD_2DD_BRIDGE, tag, owner, clock)
, device_pc98_cbus_slot_interface(mconfig, *this)
, m_fdc(*this, "fdc")
, m_bios(*this, "bios")
{
}
ROM_START( fdd_2dd )
ROM_REGION( 0x8000, "bios", ROMREGION_ERASEFF )
// from an onboard pc9801f
ROM_LOAD16_BYTE( "urf01-01.bin", 0x00000, 0x4000, CRC(2f5ae147) SHA1(69eb264d520a8fc826310b4fce3c8323867520ee) )
ROM_LOAD16_BYTE( "urf02-01.bin", 0x00001, 0x4000, CRC(62a86928) SHA1(4160a6db096dbeff18e50cbee98f5d5c1a29e2d1) )
ROM_END
const tiny_rom_entry *fdd_2dd_bridge_device::device_rom_region() const
{
return ROM_NAME( fdd_2dd );
}
static void drives_2dd(device_slot_interface &device)
{
device.option_add("525dd", TEAC_FD_55F);
}
static void floppy_formats(format_registration &fr)
{
fr.add_mfm_containers();
fr.add(FLOPPY_PC98_FORMAT);
fr.add(FLOPPY_PC98FDI_FORMAT);
fr.add(FLOPPY_FDD_FORMAT);
fr.add(FLOPPY_DCP_FORMAT);
fr.add(FLOPPY_DIP_FORMAT);
fr.add(FLOPPY_NFD_FORMAT);
// *nix/FreeBSD may distribute with this
fr.add(FLOPPY_IMG_FORMAT);
}
void fdd_2dd_bridge_device::device_add_mconfig(machine_config &config)
{
UPD765A(config, m_fdc, 8'000'000, false, true);
m_fdc->intrq_wr_callback().set([this] (int state) {
//if (BIT(m_ctrl, 2))
m_bus->int_w(7, state);
});
m_fdc->drq_wr_callback().set([this] (int state) { m_bus->drq_w(3, state); });
FLOPPY_CONNECTOR(config, "fdc:0", drives_2dd, "525dd", floppy_formats);
FLOPPY_CONNECTOR(config, "fdc:1", drives_2dd, "525dd", floppy_formats);
}
void fdd_2dd_bridge_device::device_start()
{
m_bus->set_dma_channel(3, this, true);
m_fdc->set_rate(250000);
// TODO: set_rpm?
save_item(NAME(m_ctrl));
}
void fdd_2dd_bridge_device::device_reset()
{
m_ctrl = 0;
}
void fdd_2dd_bridge_device::remap(int space_id, offs_t start, offs_t end)
{
if (space_id == AS_PROGRAM)
{
// TODO: any option to disconnect the ROM?
logerror("map ROM at 0xd6000-0xd6fff\n");
m_bus->space(AS_PROGRAM).install_rom(
0xd6000,
0xd6fff,
m_bios->base()
);
}
else if (space_id == AS_IO)
{
m_bus->install_device(0x0000, 0xffff, *this, &fdd_2dd_bridge_device::io_map);
}
}
void fdd_2dd_bridge_device::io_map(address_map &map)
{
map(0x00c8, 0x00cb).m(m_fdc, FUNC(upd765a_device::map)).umask16(0x00ff);
map(0x00cc, 0x00cc).rw(FUNC(fdd_2dd_bridge_device::ctrl_r), FUNC(fdd_2dd_bridge_device::ctrl_w));
}
u8 fdd_2dd_bridge_device::dack_r(int line)
{
u8 res = m_fdc->dma_r();
return res;
}
void fdd_2dd_bridge_device::dack_w(int line, u8 data)
{
m_fdc->dma_w(data);
}
void fdd_2dd_bridge_device::eop_w(int state)
{
m_fdc->tc_w(state);
}
bool fdd_2dd_bridge_device::fdc_drive_ready_r(upd765a_device *fdc)
{
floppy_image_device *floppy0 = fdc->subdevice<floppy_connector>("0")->get_device();
floppy_image_device *floppy1 = fdc->subdevice<floppy_connector>("1")->get_device();
return (!floppy0->ready_r() || !floppy1->ready_r());
}
u8 fdd_2dd_bridge_device::ctrl_r()
{
u8 ret = 0;
// 2dd BIOS specifically tests if a disk is in any drive
// (does not happen on 2HD standalone)
ret |= fdc_drive_ready_r(m_fdc) << 4;
//popmessage("%d %d %02x", floppy0->ready_r(), floppy1->ready_r(), ret);
// TODO: dips et al.
return ret | 0x40;
}
void fdd_2dd_bridge_device::ctrl_w(u8 data)
{
logerror("%02x ctrl\n",data);
m_fdc->reset_w(BIT(data, 7));
m_ctrl = data;
m_fdc->subdevice<floppy_connector>("0")->get_device()->mon_w(data & 8 ? CLEAR_LINE : ASSERT_LINE);
m_fdc->subdevice<floppy_connector>("1")->get_device()->mon_w(data & 8 ? CLEAR_LINE : ASSERT_LINE);
}
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