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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************
Commodore VIC-1111 16K RAM Expansion Cartridge emulation
**********************************************************************/
#include "emu.h"
#include "vic1111.h"
//**************************************************************************
// DEVICE DEFINITIONS
//**************************************************************************
DEFINE_DEVICE_TYPE(VIC1111, vic1111_device, "vic1111", "VIC-1111 16K RAM Expansion")
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// vic1111_device - constructor
//-------------------------------------------------
vic1111_device::vic1111_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: device_t(mconfig, VIC1111, tag, owner, clock)
, device_vic20_expansion_card_interface(mconfig, *this)
, m_ram(*this, "ram", 0x4000, ENDIANNESS_LITTLE)
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void vic1111_device::device_start()
{
}
//-------------------------------------------------
// vic20_cd_r - cartridge data read
//-------------------------------------------------
uint8_t vic1111_device::vic20_cd_r(offs_t offset, uint8_t data, int ram1, int ram2, int ram3, int blk1, int blk2, int blk3, int blk5, int io2, int io3)
{
if (!blk1)
{
data = m_ram[offset];
}
else if (!blk2)
{
data = m_ram[0x2000 + offset];
}
return data;
}
//-------------------------------------------------
// vic20_cd_w - cartridge data write
//-------------------------------------------------
void vic1111_device::vic20_cd_w(offs_t offset, uint8_t data, int ram1, int ram2, int ram3, int blk1, int blk2, int blk3, int blk5, int io2, int io3)
{
if (!blk1)
{
m_ram[offset] = data;
}
else if (!blk2)
{
m_ram[0x2000 + offset] = data;
}
}
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