// license:BSD-3-Clause // copyright-holders:Curt Coder /********************************************************************** Ocean Software cartridge emulation Copyright MESS Team. Visit http://mamedev.org for licensing and usage restrictions. **********************************************************************/ /* Chase H.Q. 2: Special Criminal Investigation PCB Layout ---------- |===========================| |=| LS02 | |=| | |=| | |=| ROM0 ROM1 | |=| LS273 | |=| | |=| | |=| | |===========================| ROM0,1 - 28-pin ROM (Toshiba TC531000 pinout, markings scratched off) */ #include "ocean.h" //************************************************************************** // DEVICE DEFINITIONS //************************************************************************** const device_type C64_OCEAN = &device_creator; //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // c64_ocean_cartridge_device - constructor //------------------------------------------------- c64_ocean_cartridge_device::c64_ocean_cartridge_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : device_t(mconfig, C64_OCEAN, "C64 Ocean cartridge", tag, owner, clock, "c64_ocean", __FILE__), device_c64_expansion_card_interface(mconfig, *this), m_bank(0) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void c64_ocean_cartridge_device::device_start() { // state saving save_item(NAME(m_bank)); } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void c64_ocean_cartridge_device::device_reset() { m_bank = 0; } //------------------------------------------------- // c64_cd_r - cartridge data read //------------------------------------------------- UINT8 c64_ocean_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 && m_roml.bytes()) { offs_t addr = (m_bank << 13) | (offset & 0x1fff); data = m_roml[addr & m_roml.mask()]; } else if (!romh && m_romh.bytes()) { offs_t addr = (m_bank << 13) | (offset & 0x1fff); data = m_romh[addr & m_romh.mask()]; } else if (!io1) { return m_bank; } return data; } //------------------------------------------------- // c64_cd_w - cartridge data write //------------------------------------------------- void c64_ocean_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 = data & 0x3f; } }