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// license:BSD-3-Clause
// copyright-holders:Nigel Barnes
/***************************************************************************
BMKAX25/AMTOR for G6WHK
(c) 1990 Grosvenor Software
Left: AX25 EXEC 49152
Right: AMTOR EXEC 49152
Cartridge contains a single 32K ROM and a switch to select either AX25
or AMTOR, each taking 16K.
***************************************************************************/
#include "emu.h"
#include "dragon_amtor.h"
//-------------------------------------------------
// ROM( amtor )
//-------------------------------------------------
ROM_START( amtor )
ROM_REGION(0x8000, "eprom", ROMREGION_ERASE00)
// this region is filled by cococart_slot_device::call_load()
ROM_END
//**************************************************************************
// GLOBAL VARIABLES
//**************************************************************************
DEFINE_DEVICE_TYPE(DRAGON_AMTOR, dragon_amtor_device, "dragon_amtor", "Dragon Amtor Cartridge")
//-------------------------------------------------
// INPUT_PORTS( amtor )
//-------------------------------------------------
static INPUT_PORTS_START( amtor )
PORT_START("SWITCH")
PORT_CONFNAME( 0x01, 0x00, "Switch" )
PORT_CONFSETTING( 0x00, "AMTOR")
PORT_CONFSETTING( 0x01, "AX25")
INPUT_PORTS_END
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// dragon_amtor_device - constructor
//-------------------------------------------------
dragon_amtor_device::dragon_amtor_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock)
: device_t(mconfig, DRAGON_AMTOR, tag, owner, clock)
, device_cococart_interface(mconfig, *this)
, m_eprom(*this, "eprom")
, m_switch(*this, "SWITCH")
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void dragon_amtor_device::device_start()
{
}
//-------------------------------------------------
// input_ports - device-specific input ports
//-------------------------------------------------
ioport_constructor dragon_amtor_device::device_input_ports() const
{
return INPUT_PORTS_NAME( amtor );
}
//-------------------------------------------------
// rom_region - device-specific ROM region
//-------------------------------------------------
const tiny_rom_entry *dragon_amtor_device::device_rom_region() const
{
return ROM_NAME( amtor );
}
//-------------------------------------------------
// dragon_amtor_device::get_cart_base
//-------------------------------------------------
u8 *dragon_amtor_device::get_cart_base()
{
return m_eprom->base();
}
//-------------------------------------------------
// dragon_amtor_device::get_cart_memregion
//-------------------------------------------------
memory_region *dragon_amtor_device::get_cart_memregion()
{
return m_eprom;
}
//-------------------------------------------------
// cts_read
//-------------------------------------------------
u8 dragon_amtor_device::cts_read(offs_t offset)
{
offset = bitswap<16>(offset, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 0, 1);
return bitswap<8>(m_eprom->base()[(m_switch->read() << 14) | offset], 3, 2, 1, 0, 7, 6, 5, 4 );
}
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