// license:BSD-3-Clause // copyright-holders:Curt Coder /********************************************************************** Commodore VIC-1210 3K RAM Expansion Cartridge emulation Commodore VIC-1211A Super Expander with 3K RAM Cartridge emulation Copyright MESS Team. Visit http://mamedev.org for licensing and usage restrictions. **********************************************************************/ #include "vic1210.h" //************************************************************************** // DEVICE DEFINITIONS //************************************************************************** const device_type VIC1210 = &device_creator; //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // vic1210_device - constructor //------------------------------------------------- vic1210_device::vic1210_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : device_t(mconfig, VIC1210, "VIC1210", tag, owner, clock, "vic1210", __FILE__), device_vic20_expansion_card_interface(mconfig, *this), m_ram(*this, "ram") { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void vic1210_device::device_start() { // allocate memory m_ram.allocate(0xc00); } //------------------------------------------------- // vic20_cd_r - cartridge data read //------------------------------------------------- UINT8 vic1210_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 (!ram1 || !ram2 || !ram3) { data = m_ram[offset & 0xbff]; } else if (!blk5 && m_blk5) { data = m_blk5[offset & 0xfff]; } return data; } //------------------------------------------------- // vic20_cd_w - cartridge data write //------------------------------------------------- void vic1210_device::vic20_cd_w(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 (!ram1 || !ram2 || !ram3) { m_ram[offset & 0xbff] = data; } }