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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************
VideoBrain Timeshare cartridge emulation
Copyright MESS Team.
Visit http://mamedev.org for licensing and usage restrictions.
**********************************************************************/
#include "timeshare.h"
//**************************************************************************
// DEVICE DEFINITIONS
//**************************************************************************
const device_type VB_TIMESHARE = &device_creator<videobrain_timeshare_cartridge_device>;
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// videobrain_timeshare_cartridge_device - constructor
//-------------------------------------------------
videobrain_timeshare_cartridge_device::videobrain_timeshare_cartridge_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
device_t(mconfig, VB_TIMESHARE, "VideoBrain Timeshare cartridge", tag, owner, clock, "vb_timeshare", __FILE__),
device_videobrain_expansion_card_interface(mconfig, *this)
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void videobrain_timeshare_cartridge_device::device_start()
{
}
//-------------------------------------------------
// videobrain_bo_r - cartridge data read
//-------------------------------------------------
UINT8 videobrain_timeshare_cartridge_device::videobrain_bo_r(address_space &space, offs_t offset, int cs1, int cs2)
{
UINT8 data = 0;
if (!cs1)
{
data = m_rom[offset & m_rom_mask];
}
else if (!cs2)
{
data = m_ram[offset & m_ram_mask];
}
return data;
}
//-------------------------------------------------
// videobrain_bo_w - cartridge data write
//-------------------------------------------------
void videobrain_timeshare_cartridge_device::videobrain_bo_w(address_space &space, offs_t offset, UINT8 data, int cs1, int cs2)
{
if (!cs2)
{
m_ram[offset & m_ram_mask] = data;
}
}
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