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/*********************************************************************
laser128.c
Helper to implement the Laser 128's built-in slot peripherals
*********************************************************************/
#include "laser128.h"
#include "includes/apple2.h"
/***************************************************************************
PARAMETERS
***************************************************************************/
//**************************************************************************
// GLOBAL VARIABLES
//**************************************************************************
const device_type A2BUS_LASER128 = &device_creator<a2bus_laser128_device>;
MACHINE_CONFIG_FRAGMENT( a2laser128 )
MACHINE_CONFIG_END
/***************************************************************************
FUNCTION PROTOTYPES
***************************************************************************/
//-------------------------------------------------
// machine_config_additions - device-specific
// machine configurations
//-------------------------------------------------
machine_config_constructor a2bus_laser128_device::device_mconfig_additions() const
{
return MACHINE_CONFIG_NAME( a2laser128 );
}
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
a2bus_laser128_device::a2bus_laser128_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname, const char *source) :
device_t(mconfig, type, name, tag, owner, clock, shortname, source),
device_a2bus_card_interface(mconfig, *this)
{
}
a2bus_laser128_device::a2bus_laser128_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
device_t(mconfig, A2BUS_LASER128, "VTech Laser 128 Internal Device", tag, owner, clock, "a2laser128", __FILE__),
device_a2bus_card_interface(mconfig, *this)
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void a2bus_laser128_device::device_start()
{
// set_a2bus_device makes m_slot valid
set_a2bus_device();
}
void a2bus_laser128_device::device_reset()
{
m_rom = device().machine().root_device().memregion("maincpu")->base();
m_slot7_bank = 0;
}
UINT8 a2bus_laser128_device::read_c0nx(address_space &space, UINT8 offset)
{
return 0x00;
}
void a2bus_laser128_device::write_c0nx(address_space &space, UINT8 offset, UINT8 data)
{
}
UINT8 a2bus_laser128_device::read_cnxx(address_space &space, UINT8 offset)
{
return m_rom[offset + (m_slot * 0x100) + 0x4000];
}
UINT8 a2bus_laser128_device::read_c800(address_space &space, UINT16 offset)
{
switch (m_slot)
{
case 1:
return m_rom[(offset & 0x7ff) + 0x4800];
case 2:
return m_rom[(offset & 0x7ff) + 0x5800];
case 5:
return m_rom[(offset & 0x7ff) + 0x5000];
case 6:
return m_rom[(offset & 0x7ff) + 0x7800];
case 7:
return m_rom[(offset & 0x7ff) + 0x5c00 + m_slot7_bank];
}
return 0xff;
}
void a2bus_laser128_device::write_c800(address_space &space, UINT16 offset, UINT8 data)
{
}
bool a2bus_laser128_device::take_c800()
{
if ((m_slot == 1) || (m_slot == 2) || (m_slot == 5) || (m_slot == 7))
{
return true;
}
return false;
}
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