// license:BSD-3-Clause // copyright-holders:Curt Coder /********************************************************************** Commodore VIC-20 Standard 8K/16K ROM Cartridge emulation **********************************************************************/ #include "std.h" //************************************************************************** // DEVICE DEFINITIONS //************************************************************************** const device_type VIC20_STD = &device_creator; //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // vic20_standard_cartridge_device - constructor //------------------------------------------------- vic20_standard_cartridge_device::vic20_standard_cartridge_device(const machine_config &mconfig, std::string tag, device_t *owner, UINT32 clock) : device_t(mconfig, VIC20_STD, "VIC-20 Standard Cartridge", tag, owner, clock, "vic20_standard", __FILE__), device_vic20_expansion_card_interface(mconfig, *this) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void vic20_standard_cartridge_device::device_start() { } //------------------------------------------------- // vic20_cd_r - cartridge data read //------------------------------------------------- UINT8 vic20_standard_cartridge_device::vic20_cd_r(address_space &space, offs_t offset, UINT8 data, int ram1, int ram2, int ram3, int blk1, int blk2, int blk3, int blk5, int io2, int io3) { if (!blk1 && (m_blk1 != nullptr)) { data = m_blk1[offset]; } else if (!blk2 && (m_blk2 != nullptr)) { data = m_blk2[offset]; } else if (!blk3 && (m_blk3 != nullptr)) { data = m_blk3[offset]; } else if (!blk5 && (m_blk5 != nullptr)) { data = m_blk5[offset]; } return data; }