// license:BSD-3-Clause // copyright-holders:Curt Coder /********************************************************************** Commodore VIC-1111 16K RAM Expansion Cartridge emulation **********************************************************************/ #include "emu.h" #include "vic1111.h" //************************************************************************** // DEVICE DEFINITIONS //************************************************************************** const device_type VIC1111 = &device_creator; //************************************************************************** // 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, "VIC1111", tag, owner, clock, "vic1111", __FILE__), device_vic20_expansion_card_interface(mconfig, *this), m_ram(*this, "ram") { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void vic1111_device::device_start() { // allocate memory m_ram.allocate(0x4000); } //------------------------------------------------- // vic20_cd_r - cartridge data read //------------------------------------------------- uint8_t vic1111_device::vic20_cd_r(address_space &space, 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(address_space &space, 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; } }