// 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, const XTAL &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; } }