/* * supergames.c - Cartridge handling, Super Games cart. * * Written by * Andreas Boose * * 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 "monitor.h" #include "snapshot.h" #include "supergames.h" #include "types.h" #include "util.h" #include "crt.h" /* "Super Games" ("Commodore Arcade 3 in 1") - This cart uses 4 16Kb banks mapped in at $8000-$BFFF. - assuming the i/o register is reset to 0, the cartridge starts up in bank 0 and in 16k configuration. The control registers is at $DF00, and has the following meaning: bit meaning --- ------- 0 bank bit 0 1 bank bit 1 2 mode (0 = EXROM/GAME (bridged on the same wire - 16k config) 1 = cartridge disabled) 3 write-protect-latch (1 = no more changes are possible until the next hardware-reset ) 4-7 unused */ static int currbank = 0; static int currmode = 0; static int reglatched = 0; static uint8_t regval = 0; static void supergames_io2_store(uint16_t addr, uint8_t value) { if (reglatched == 0) { regval = value; currbank = value & 3; currmode = ((value >> 2) & 1) ^ 1; reglatched = ((value >> 3) & 1); cart_romhbank_set_slotmain(currbank); cart_romlbank_set_slotmain(currbank); /* printf("value: %02x bank: %d mode: %d\n", value, currbank, currmode); */ cart_set_port_exrom_slotmain(currmode); cart_set_port_game_slotmain(currmode); cart_port_config_changed_slotmain(); } } static uint8_t supergames_io2_peek(uint16_t addr) { return regval; } static int supergames_dump(void) { mon_out("Bank: %d (%s, %s)\n", currbank, currmode ? "enabled" : "disabled", reglatched ? "latched" : "not latched"); return 0; } /* ---------------------------------------------------------------------*/ static io_source_t supergames_device = { CARTRIDGE_NAME_SUPER_GAMES, /* name of the device */ IO_DETACH_CART, /* use cartridge ID to detach the device when involved in a read-collision */ IO_DETACH_NO_RESOURCE, /* does not use a resource for detach */ 0xdf00, 0xdfff, 0xff, /* range for the device, address is ignored, reg:$df00, mirrors:$df01-$dfff */ 0, /* read is never valid, reg is write only */ supergames_io2_store, /* store function */ NULL, /* NO poke function */ NULL, /* NO read function */ supergames_io2_peek, /* peek function */ supergames_dump, /* device state information dump function */ CARTRIDGE_SUPER_GAMES, /* 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 *supergames_list_item = NULL; static const export_resource_t export_res = { CARTRIDGE_NAME_SUPER_GAMES, 1, 1, NULL, &supergames_device, CARTRIDGE_SUPER_GAMES }; /* ---------------------------------------------------------------------*/ void supergames_config_init(void) { /* cart_config_changed_slotmain(CMODE_16KGAME, CMODE_16KGAME, CMODE_READ); */ reglatched = 0; supergames_io2_store(0xdf00, 0); } void supergames_config_setup(uint8_t *rawcart) { memcpy(&roml_banks[0x0000], &rawcart[0x0000], 0x2000); memcpy(&romh_banks[0x0000], &rawcart[0x2000], 0x2000); memcpy(&roml_banks[0x2000], &rawcart[0x4000], 0x2000); memcpy(&romh_banks[0x2000], &rawcart[0x6000], 0x2000); memcpy(&roml_banks[0x4000], &rawcart[0x8000], 0x2000); memcpy(&romh_banks[0x4000], &rawcart[0xa000], 0x2000); memcpy(&roml_banks[0x6000], &rawcart[0xc000], 0x2000); memcpy(&romh_banks[0x6000], &rawcart[0xe000], 0x2000); /* cart_config_changed_slotmain(CMODE_16KGAME, CMODE_16KGAME, CMODE_READ); */ reglatched = 0; supergames_io2_store(0xdf00, 0); } /* ---------------------------------------------------------------------*/ static int supergames_common_attach(void) { if (export_add(&export_res) < 0) { return -1; } supergames_list_item = io_source_register(&supergames_device); return 0; } int supergames_bin_attach(const char *filename, uint8_t *rawcart) { if (util_file_load(filename, rawcart, 0x10000, UTIL_FILE_LOAD_SKIP_ADDRESS) < 0) { return -1; } return supergames_common_attach(); } int supergames_crt_attach(FILE *fd, uint8_t *rawcart) { crt_chip_header_t chip; while (1) { if (crt_read_chip_header(&chip, fd)) { break; } if (chip.start != 0x8000 || chip.size != 0x4000 || chip.bank > 3) { return -1; } if (crt_read_chip(rawcart, chip.bank << 14, &chip, fd)) { return -1; } } return supergames_common_attach(); } void supergames_detach(void) { export_remove(&export_res); io_source_unregister(supergames_list_item); supergames_list_item = NULL; } /* ---------------------------------------------------------------------*/ /* CARTSUPERGAMES snapshot module format: type | name | version | description ------------------------------------------- BYTE | mode | 0.2 | current mode BYTE | regval | 0.2 | register BYTE | bank | 0.0+ | current bank BYTE | reg latched | 0.1 | register latched flag ARRAY | ROML | 0.0+ | 32768 BYTES of ROML data ARRAY | ROMH | 0.0+ | 32768 BYTES of ROMH data */ static const char snap_module_name[] = "CARTSUPERGAMES"; #define SNAP_MAJOR 0 #define SNAP_MINOR 2 int supergames_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)currmode) < 0 || SMW_B(m, regval) < 0 || SMW_B(m, (uint8_t)currbank) < 0 || SMW_B(m, (uint8_t)reglatched) < 0 || SMW_BA(m, roml_banks, 0x8000) < 0 || SMW_BA(m, romh_banks, 0x8000) < 0) { snapshot_module_close(m); return -1; } return snapshot_module_close(m); } int supergames_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; } /* new in 0.2 */ if (!snapshot_version_is_smaller(vmajor, vminor, 0, 2)) { if (0 || SMR_B_INT(m, &currmode) < 0 || SMR_B(m, ®val) < 0) { goto fail; } } else { currmode = 0; regval = 0; } if (SMR_B_INT(m, &currbank) < 0) { goto fail; } /* new in 0.1 */ if (!snapshot_version_is_smaller(vmajor, vminor, 0, 2)) { if (SMR_B_INT(m, ®latched) < 0) { goto fail; } } else { reglatched = 0; } if (0 || SMR_BA(m, roml_banks, 0x8000) < 0 || SMR_BA(m, romh_banks, 0x8000) < 0) { goto fail; } snapshot_module_close(m); return supergames_common_attach(); fail: snapshot_module_close(m); return -1; }