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/***************************************************************************
tvc_hbf.c
***************************************************************************/
#include "emu.h"
#include "tvc_hbf.h"
/***************************************************************************
IMPLEMENTATION
***************************************************************************/
FLOPPY_FORMATS_MEMBER( tvc_hbf_device::floppy_formats )
FLOPPY_TVC_FORMAT
FLOPPY_FORMATS_END
static SLOT_INTERFACE_START( tvc_hbf_floppies )
SLOT_INTERFACE( "525qd", FLOPPY_525_QD )
SLOT_INTERFACE_END
static MACHINE_CONFIG_FRAGMENT(tvc_hbf)
MCFG_FD1793x_ADD("fdc", XTAL_16MHz / 16 * 8) // real clock is 16MHz / 16
MCFG_FLOPPY_DRIVE_ADD("fdc:0", tvc_hbf_floppies, "525qd", NULL, tvc_hbf_device::floppy_formats)
MCFG_FLOPPY_DRIVE_ADD("fdc:1", tvc_hbf_floppies, "525qd", NULL, tvc_hbf_device::floppy_formats)
MACHINE_CONFIG_END
ROM_START( tvc_hbf )
ROM_REGION(0x4000, "hbf", 0)
ROM_DEFAULT_BIOS("basic")
ROM_SYSTEM_BIOS( 0, "basic", "BASIC" )
ROMX_LOAD("hbf.rom", 0x0000, 0x4000, CRC(ae34982b) SHA1(96c4154c04086c537ae1272fe051a256d2f5be3f), ROM_BIOS(1))
ROM_SYSTEM_BIOS( 1, "upm", "UPM" )
ROMX_LOAD("d_tvcupm.128", 0x0000, 0x4000, CRC(b3a567ad) SHA1(f92df6074b07f5f19e8c96ff1315da0cfeec9f74), ROM_BIOS(2))
ROM_SYSTEM_BIOS( 2, "vtdos11", "VT-DOS v1.1" )
ROMX_LOAD("d_tvcdos.128", 0x0000, 0x4000, CRC(2acf8477) SHA1(07bf39b633a564f98dd4b2e93bd889501b341550), ROM_BIOS(3))
ROM_SYSTEM_BIOS( 3, "vtdos12", "VT-DOS v1.2" )
ROMX_LOAD("d_dos12.128", 0x0000, 0x4000, CRC(f5c35597) SHA1(2fa44ad089a51f453b580e0b13e3be96a0f14649), ROM_BIOS(4))
ROM_REGION(0x1000, "ram", ROMREGION_ERASE)
ROM_END
//**************************************************************************
// GLOBAL VARIABLES
//**************************************************************************
const device_type TVC_HBF = &device_creator<tvc_hbf_device>;
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// tvc_hbf_device - constructor
//-------------------------------------------------
tvc_hbf_device::tvc_hbf_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
: device_t(mconfig, TVC_HBF, "HBF floppy interface", tag, owner, clock),
device_tvcexp_interface( mconfig, *this ),
m_fdc(*this, "fdc")
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void tvc_hbf_device::device_start()
{
m_rom = memregion("hbf")->base();
m_ram = memregion("ram")->base();
}
//-------------------------------------------------
// device_reset - device-specific reset
//-------------------------------------------------
void tvc_hbf_device::device_reset()
{
m_rom_bank = 0;
}
//-------------------------------------------------
// device_mconfig_additions
//-------------------------------------------------
machine_config_constructor tvc_hbf_device::device_mconfig_additions() const
{
return MACHINE_CONFIG_NAME( tvc_hbf );
}
//-------------------------------------------------
// device_rom_region
//-------------------------------------------------
const rom_entry *tvc_hbf_device::device_rom_region() const
{
return ROM_NAME( tvc_hbf );
}
/*-------------------------------------------------
read
-------------------------------------------------*/
READ8_MEMBER(tvc_hbf_device::read)
{
if (offset>=0x1000)
return m_ram[offset& 0x0fff];
else
return m_rom[(m_rom_bank<<12) + (offset & 0x0fff)];
}
//-------------------------------------------------
// write
//-------------------------------------------------
WRITE8_MEMBER(tvc_hbf_device::write)
{
if (offset>=0x1000)
m_ram[offset & 0x0fff] = data;
else
logerror("'%s': unmapped write to %04x %02x\n", tag(), offset, data);
}
//-------------------------------------------------
// IO read
//-------------------------------------------------
READ8_MEMBER(tvc_hbf_device::io_read)
{
switch((offset>>2) & 0x03)
{
case 0x00:
return m_fdc->read(space, offset & 3);
case 0x01:
return (m_fdc->drq_r()<<7) | (m_fdc->intrq_r() ? 0x01 : 0x00);
default:
return 0x00;
}
}
//-------------------------------------------------
// IO write
//-------------------------------------------------
WRITE8_MEMBER(tvc_hbf_device::io_write)
{
switch((offset>>2) & 0x03)
{
case 0x00:
m_fdc->write(space, offset & 3, data);
break;
case 0x01:
{
// bit 0-3 drive select
// bit 5 DDEN
// bit 6 floppy motor
// bit 7 side select
floppy_image_device *floppy = NULL;
if (BIT(data, 0)) floppy = subdevice<floppy_connector>("fdc:0")->get_device();
if (BIT(data, 1)) floppy = subdevice<floppy_connector>("fdc:1")->get_device();
m_fdc->set_floppy(floppy);
m_fdc->dden_w(BIT(data, 5));
if (floppy) floppy->mon_w(!BIT(data, 6));
if (floppy) floppy->ss_w(BIT(data, 7));
break;
}
case 0x02:
m_rom_bank = (data>>4) & 0x03;
break;
}
}
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