/********************************************************************** Cinemaware Warp Speed cartridge emulation Copyright MESS Team. Visit http://mamedev.org for licensing and usage restrictions. **********************************************************************/ /* PCB Layout ---------- |===================| |=| SW1 | |=| | |=| SW2 | |=| | |=| | |=| ROM | |=| LS109| |=| | |===================| ROM - "DEI-356NR-WRPIIDA1 (C) NCR A8847 609-2415038 F833071" 16Kx8 ROM SW1 - mode switch (C64/C128) SW2 - reset button */ #include "c64_warp_speed.h" //************************************************************************** // MACROS/CONSTANTS //************************************************************************** #define UNSCRAMBLE_ADDRESS(_offset) \ BITSWAP16(_offset,15,14,12,13,5,2,7,9,11,10,8,6,4,3,1,0) #define UNSCRAMBLE_DATA(_data) \ BITSWAP8(_data,7,6,5,0,1,4,2,3) //************************************************************************** // DEVICE DEFINITIONS //************************************************************************** const device_type C64_WARP_SPEED = &device_creator; //------------------------------------------------- // INPUT_PORTS( c64_warp_speed ) //------------------------------------------------- static INPUT_PORTS_START( c64_warp_speed ) PORT_START("SW1") PORT_DIPNAME( 0x01, 0x01, "Mode" ) PORT_DIPSETTING( 0x01, "C64" ) PORT_DIPSETTING( 0x00, "C128" ) PORT_START("SW2") PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_OTHER ) PORT_NAME("Reset") PORT_CODE(KEYCODE_F11) PORT_WRITE_LINE_DEVICE_MEMBER(DEVICE_SELF_OWNER, c64_expansion_slot_device, reset_w) INPUT_PORTS_END //------------------------------------------------- // input_ports - device-specific input ports //------------------------------------------------- ioport_constructor c64_warp_speed_cartridge_device::device_input_ports() const { return INPUT_PORTS_NAME( c64_warp_speed ); } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // c64_warp_speed_cartridge_device - constructor //------------------------------------------------- c64_warp_speed_cartridge_device::c64_warp_speed_cartridge_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : device_t(mconfig, C64_WARP_SPEED, "C64 Warp Speed cartridge", tag, owner, clock, "c64_warp_speed", __FILE__), device_c64_expansion_card_interface(mconfig, *this) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void c64_warp_speed_cartridge_device::device_start() { } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void c64_warp_speed_cartridge_device::device_reset() { m_exrom = 0; m_game = 0; } //------------------------------------------------- // c64_cd_r - cartridge data read //------------------------------------------------- UINT8 c64_warp_speed_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 || !io1 || !io2) { offs_t addr = UNSCRAMBLE_ADDRESS(offset & 0x3fff); data = UNSCRAMBLE_DATA(m_roml[addr]); } return data; } //------------------------------------------------- // c64_cd_w - cartridge data write //------------------------------------------------- void c64_warp_speed_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_exrom = 0; m_game = 0; } else if (!io2) { m_exrom = 1; m_game = 1; } }