/* * gamekiller.c - Cartridge handling, Game Killer cart. * * Written by * Groepaz * * This file is part of VICE, the Versatile Commodore Emulator. * See README for copyright notice. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA * 02111-1307 USA. * */ #include "vice.h" #include #include #include #define CARTRIDGE_INCLUDE_SLOTMAIN_API #include "c64cartsystem.h" #undef CARTRIDGE_INCLUDE_SLOTMAIN_API #include "c64mem.h" #include "cartio.h" #include "cartridge.h" #include "export.h" #include "gamekiller.h" #include "snapshot.h" #include "types.h" #include "util.h" #include "crt.h" /* #define GKDEBUG */ #ifdef GKDEBUG #define DBG(x) printf x #else #define DBG(x) #endif /* ROBTEK "Game Killer" - 1 8k ROM - when cartridge is active, ultimax is enabled when addr>=e000, so the rom is visible at e000, below is normal c64 ram - the code writes 0 to both de00 and df00 to disable the cartridge. we assume the cart uses the full io1 and io2 range - when the freezer button is pressed the cartridge will be enabled and an NMI will be triggered */ #define GAME_KILLER_CART_SIZE (8 * 0x400) /* ---------------------------------------------------------------------*/ static int cartridge_disable_flag; static void gamekiller_io1_store(uint16_t addr, uint8_t value) { DBG(("io1 %04x %02x\n", addr, value)); cartridge_disable_flag++; if (cartridge_disable_flag > 1) { cart_config_changed_slotmain(2, 2, CMODE_READ); DBG(("Game Killer disabled\n")); } } static void gamekiller_io2_store(uint16_t addr, uint8_t value) { DBG(("io2 %04x %02x\n", addr, value)); cartridge_disable_flag++; if (cartridge_disable_flag > 1) { cart_config_changed_slotmain(2, 2, CMODE_READ); DBG(("Game Killer disabled\n")); } } static uint8_t gamekiller_peek(uint16_t addr) { return 0; } static io_source_t gamekiller_io1_device = { CARTRIDGE_NAME_GAME_KILLER, /* name of the device */ IO_DETACH_CART, /* use cartridge ID to detach the device when involved in a read-collision */ IO_DETACH_NO_RESOURCE, /* does not use a resource for detach */ 0xde00, 0xdeff, 0xff, /* range for the device, address is ignored, reg:$de00, mirrors:$de01-$deff */ 0, /* read is never valid. reg is write only */ gamekiller_io1_store, /* store function */ NULL, /* NO poke function */ NULL, /* NO read function */ gamekiller_peek, /* peek function */ NULL, /* TODO: device state information dump function */ CARTRIDGE_GAME_KILLER, /* cartridge ID */ IO_PRIO_NORMAL, /* normal priority, device read needs to be checked for collisions */ 0, /* insertion order, gets filled in by the registration function */ IO_MIRROR_NONE /* NO mirroring */ }; static io_source_t gamekiller_io2_device = { CARTRIDGE_NAME_GAME_KILLER, /* name of the device */ IO_DETACH_CART, /* use cartridge ID to detach the device when involved in a read-collision */ IO_DETACH_NO_RESOURCE, /* does not use a resource for detach */ 0xdf00, 0xdfff, 0xff, /* range for the device, address is ignored, reg:$df00, mirrors:$df01-$dfff */ 0, /* read is never valid */ gamekiller_io2_store, /* store function */ NULL, /* NO poke function */ NULL, /* NO read function */ gamekiller_peek, /* peek function */ NULL, /* TODO: device state information dump function */ CARTRIDGE_GAME_KILLER, /* cartridge ID */ IO_PRIO_NORMAL, /* normal priority, device read needs to be checked for collisions */ 0, /* insertion order, gets filled in by the registration function */ IO_MIRROR_NONE /* NO mirroring */ }; static io_source_list_t *gamekiller_io1_list_item = NULL; static io_source_list_t *gamekiller_io2_list_item = NULL; static const export_resource_t export_res = { CARTRIDGE_NAME_GAME_KILLER, 1, 0, &gamekiller_io1_device, &gamekiller_io2_device, CARTRIDGE_GAME_KILLER }; /* ---------------------------------------------------------------------*/ int gamekiller_peek_mem(export_t *ex, uint16_t addr, uint8_t *value) { if (cartridge_disable_flag <= 1) { if (addr >= 0xe000) { *value = romh_banks[addr & 0x1fff]; return CART_READ_VALID; } } return CART_READ_THROUGH; } void gamekiller_freeze(void) { DBG(("Game Killer freeze\n")); cart_config_changed_slotmain(CMODE_ULTIMAX, CMODE_ULTIMAX, CMODE_READ | CMODE_RELEASE_FREEZE); cartridge_disable_flag = 0; } void gamekiller_config_init(void) { cart_config_changed_slotmain(CMODE_ULTIMAX, CMODE_ULTIMAX, CMODE_READ); cartridge_disable_flag = 0; } void gamekiller_config_setup(uint8_t *rawcart) { memcpy(romh_banks, rawcart, GAME_KILLER_CART_SIZE); cart_config_changed_slotmain(CMODE_ULTIMAX, CMODE_ULTIMAX, CMODE_READ); cartridge_disable_flag = 0; } /* ---------------------------------------------------------------------*/ static int gamekiller_common_attach(void) { if (export_add(&export_res) < 0) { return -1; } gamekiller_io1_list_item = io_source_register(&gamekiller_io1_device); gamekiller_io2_list_item = io_source_register(&gamekiller_io2_device); return 0; } int gamekiller_bin_attach(const char *filename, uint8_t *rawcart) { if (util_file_load(filename, rawcart, GAME_KILLER_CART_SIZE, UTIL_FILE_LOAD_SKIP_ADDRESS) < 0) { return -1; } return gamekiller_common_attach(); } int gamekiller_crt_attach(FILE *fd, uint8_t *rawcart) { crt_chip_header_t chip; if (crt_read_chip_header(&chip, fd)) { return -1; } if (chip.bank > 0 || chip.size != GAME_KILLER_CART_SIZE) { return -1; } if (crt_read_chip(rawcart, 0, &chip, fd)) { return -1; } return gamekiller_common_attach(); } void gamekiller_detach(void) { export_remove(&export_res); io_source_unregister(gamekiller_io1_list_item); io_source_unregister(gamekiller_io2_list_item); gamekiller_io1_list_item = NULL; gamekiller_io2_list_item = NULL; } /* ---------------------------------------------------------------------*/ /* CARTGK snapshot module format: type | name | description ----------------------------- BYTE | disable | cartridge disable flag ARRAY | ROMH | 8192 BYTES of ROMH data */ static const char snap_module_name[] = "CARTGK"; #define SNAP_MAJOR 0 #define SNAP_MINOR 0 int gamekiller_snapshot_write_module(snapshot_t *s) { snapshot_module_t *m; m = snapshot_module_create(s, snap_module_name, SNAP_MAJOR, SNAP_MINOR); if (m == NULL) { return -1; } if (0 || (SMW_B(m, (uint8_t)cartridge_disable_flag) < 0) || (SMW_BA(m, romh_banks, GAME_KILLER_CART_SIZE) < 0)) { snapshot_module_close(m); return -1; } return snapshot_module_close(m); } int gamekiller_snapshot_read_module(snapshot_t *s) { uint8_t vmajor, vminor; snapshot_module_t *m; m = snapshot_module_open(s, snap_module_name, &vmajor, &vminor); if (m == NULL) { return -1; } /* Do not accept versions higher than current */ if (snapshot_version_is_bigger(vmajor, vminor, SNAP_MAJOR, SNAP_MINOR)) { snapshot_set_error(SNAPSHOT_MODULE_HIGHER_VERSION); goto fail; } if (0 || (SMR_B_INT(m, &cartridge_disable_flag) < 0) || (SMR_BA(m, romh_banks, GAME_KILLER_CART_SIZE) < 0)) { goto fail; } snapshot_module_close(m); return gamekiller_common_attach(); fail: snapshot_module_close(m); return -1; }