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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************
TIKI-100 8/16 8088/8087 expansion card emulation
**********************************************************************/
#include "emu.h"
#include "8088.h"
//**************************************************************************
// MACROS/CONSTANTS
//**************************************************************************
#define I8088_TAG "u3"
//**************************************************************************
// DEVICE DEFINITIONS
//**************************************************************************
DEFINE_DEVICE_TYPE(TIKI100_8088, tiki100_8088_device, "tiki100_8088", "TIKI-100 8/16")
//-------------------------------------------------
// ROM( tiki100_8088 )
//-------------------------------------------------
ROM_START( tiki100_8088 )
ROM_REGION( 0x1000, I8088_TAG, 0 )
ROM_LOAD( "boot 1.0.u3", 0x0000, 0x1000, CRC(436974aa) SHA1(837087b3ab982d047e4f15799fef3daa37dd6c01) )
ROM_REGION( 0x100, "u26", 0 )
ROM_LOAD( "53ls140.u26", 0x000, 0x100, CRC(fc5902e1) SHA1(afb9cb54ab6fc449e7544ddb3cbebc3770c4f937) )
ROM_END
//-------------------------------------------------
// rom_region - device-specific ROM region
//-------------------------------------------------
const tiny_rom_entry *tiki100_8088_device::device_rom_region() const
{
return ROM_NAME( tiki100_8088 );
}
static ADDRESS_MAP_START( i8088_mem, AS_PROGRAM, 8, tiki100_8088_device )
AM_RANGE(0x00000, 0xbffff) AM_RAM
AM_RANGE(0xc0000, 0xcffff) AM_DEVREADWRITE(":" TIKI100_BUS_TAG, tiki100_bus_device, exin_mrq_r, exin_mrq_w)
AM_RANGE(0xff000, 0xfffff) AM_ROM AM_REGION(I8088_TAG, 0)
ADDRESS_MAP_END
static ADDRESS_MAP_START( i8088_io, AS_IO, 8, tiki100_8088_device )
AM_RANGE(0x7f, 0x7f) AM_READWRITE(read, write)
ADDRESS_MAP_END
//-------------------------------------------------
// MACHINE_CONFIG_START( tiki100_8088 )
//-------------------------------------------------
static MACHINE_CONFIG_START( tiki100_8088 )
MCFG_CPU_ADD(I8088_TAG, I8088, 6000000)
MCFG_CPU_PROGRAM_MAP(i8088_mem)
MCFG_CPU_IO_MAP(i8088_io)
MACHINE_CONFIG_END
//-------------------------------------------------
// machine_config_additions - device-specific
// machine configurations
//-------------------------------------------------
machine_config_constructor tiki100_8088_device::device_mconfig_additions() const
{
return MACHINE_CONFIG_NAME( tiki100_8088 );
}
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// tiki100_8088_device - constructor
//-------------------------------------------------
tiki100_8088_device::tiki100_8088_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
device_t(mconfig, TIKI100_8088, tag, owner, clock),
device_tiki100bus_card_interface(mconfig, *this),
m_maincpu(*this, I8088_TAG),
m_data(0)
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void tiki100_8088_device::device_start()
{
}
//-------------------------------------------------
// device_reset - device-specific reset
//-------------------------------------------------
void tiki100_8088_device::device_reset()
{
m_maincpu->reset();
m_data = 0;
}
//-------------------------------------------------
// tiki100bus_iorq_r - I/O read
//-------------------------------------------------
uint8_t tiki100_8088_device::iorq_r(address_space &space, offs_t offset, uint8_t data)
{
if ((offset & 0xff) == 0x7f)
{
data = m_data;
}
return data;
}
//-------------------------------------------------
// tiki100bus_iorq_w - I/O write
//-------------------------------------------------
void tiki100_8088_device::iorq_w(address_space &space, offs_t offset, uint8_t data)
{
if ((offset & 0xff) == 0x7f)
{
m_data = data & 0x0f;
if (BIT(data, 5))
{
device_reset();
}
}
}
//-------------------------------------------------
// read -
//-------------------------------------------------
READ8_MEMBER( tiki100_8088_device::read )
{
return m_busak << 4 | m_data;
}
//-------------------------------------------------
// write -
//-------------------------------------------------
WRITE8_MEMBER( tiki100_8088_device::write )
{
m_data = data & 0x0f;
m_bus->busrq_w(BIT(data, 4));
}
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