/********************************************************************** Ross cartridge emulation Copyright MESS Team. Visit http://mamedev.org for licensing and usage restrictions. **********************************************************************/ #include "c64_ross.h" //************************************************************************** // DEVICE DEFINITIONS //************************************************************************** const device_type C64_ROSS = &device_creator; //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // c64_ross_cartridge_device - constructor //------------------------------------------------- c64_ross_cartridge_device::c64_ross_cartridge_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : device_t(mconfig, C64_ROSS, "C64 Ross cartridge", tag, owner, clock, "c64_ross", __FILE__), device_c64_expansion_card_interface(mconfig, *this) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void c64_ross_cartridge_device::device_start() { // state saving save_item(NAME(m_bank)); } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void c64_ross_cartridge_device::device_reset() { m_exrom = 0; m_game = 0; m_bank = 0; } //------------------------------------------------- // c64_cd_r - cartridge data read //------------------------------------------------- UINT8 c64_ross_cartridge_device::c64_cd_r(address_space &space, offs_t offset, UINT8 data, int sphi2, int ba, int roml, int romh, int io1, int io2) { if (!roml || !romh) { offs_t addr = (m_bank << 14) | (offset & 0x3fff); data = m_roml[addr & m_roml_mask]; } return data; } //------------------------------------------------- // c64_cd_w - cartridge data write //------------------------------------------------- void c64_ross_cartridge_device::c64_cd_w(address_space &space, offs_t offset, UINT8 data, int sphi2, int ba, int roml, int romh, int io1, int io2) { if (!io1) { m_bank = 1; } else if (!io2) { m_exrom = 1; m_game = 1; } }