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// license:BSD-3-Clause
// copyright-holders:Sandro Ronco
/***************************************************************************
K200 64K RAM expansion
K202 192K RAM expansion
K208 448K RAM expansion
***************************************************************************/
#include "emu.h"
#include "ram.h"
/***************************************************************************
IMPLEMENTATION
***************************************************************************/
//**************************************************************************
// GLOBAL VARIABLES
//**************************************************************************
const device_type DMV_K200 = &device_creator<dmv_k200_device>;
const device_type DMV_K202 = &device_creator<dmv_k202_device>;
const device_type DMV_K208 = &device_creator<dmv_k208_device>;
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// dmv_ram_device - constructor
//-------------------------------------------------
dmv_ram_device::dmv_ram_device(const machine_config &mconfig, device_type type, UINT32 size, 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_dmvslot_interface( mconfig, *this ),
m_size(size)
{
}
//-------------------------------------------------
// dmv_k200_device - constructor
//-------------------------------------------------
dmv_k200_device::dmv_k200_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
: dmv_ram_device(mconfig, DMV_K200, 1, "K200 64K RAM expansion", tag, owner, clock, "dmv_k200", __FILE__)
{
}
//-------------------------------------------------
// dmv_k202_device - constructor
//-------------------------------------------------
dmv_k202_device::dmv_k202_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
: dmv_ram_device(mconfig, DMV_K202, 3, "K202 192K RAM expansion", tag, owner, clock, "dmv_k202", __FILE__)
{
}
//-------------------------------------------------
// dmv_k208_device - constructor
//-------------------------------------------------
dmv_k208_device::dmv_k208_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
: dmv_ram_device(mconfig, DMV_K208, 7 , "K208 448K RAM expansion", tag, owner, clock, "dmv_k208", __FILE__)
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void dmv_ram_device::device_start()
{
m_ram = machine().memory().region_alloc( "expram", m_size * 0x10000, 1, ENDIANNESS_LITTLE )->base();
}
//-------------------------------------------------
// read
//-------------------------------------------------
void dmv_ram_device::ram_read(UINT8 cas, offs_t offset, UINT8 &data)
{
if (cas && cas <= m_size)
data = m_ram[((cas - 1) << 16) | (offset & 0xffff)];
}
//-------------------------------------------------
// write
//-------------------------------------------------
void dmv_ram_device::ram_write(UINT8 cas, offs_t offset, UINT8 data)
{
if (cas && cas <= m_size)
m_ram[((cas - 1) << 16) | (offset & 0xffff)] = data;
}
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