/* * blackbox8.c - Cartridge handling, Blackbox v8 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 "blackbox8.h" #include "monitor.h" #include "snapshot.h" #include "types.h" #include "util.h" #include "crt.h" /* Black Box V8 32k or 64k, 2 or 4 16K banks writing to IO2 sets the cartridge config: A0 - EXROM A1 - GAME A2 - bank lsb A3 - bank msb */ static int bb8_rom_banks = 4; static uint8_t regval = 0; /* some prototypes are needed */ static void blackbox8_io2_store(uint16_t addr, uint8_t value); static int blackbox8_dump(void); static io_source_t final3_io2_device = { CARTRIDGE_NAME_BLACKBOX8, /* 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, regs:$df00-$dfff */ 1, /* read is always valid */ blackbox8_io2_store, /* store function */ NULL, /* NO poke function */ NULL, /* NO read function */ NULL, /* NO peek function */ blackbox8_dump, /* device state information dump function */ CARTRIDGE_BLACKBOX8, /* 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 *final3_io2_list_item = NULL; static const export_resource_t export_res_v3 = { CARTRIDGE_NAME_BLACKBOX8, 1, 1, NULL, &final3_io2_device, CARTRIDGE_BLACKBOX8 }; /* ---------------------------------------------------------------------*/ void blackbox8_io2_store(uint16_t addr, uint8_t value) { uint8_t mode, bank; regval = addr & 0x0f; /* printf("io2 write %04x %02x\n", addr, value); */ mode = (addr & 3) ^ 1; bank = ((addr >> 2) & 3) ^ 3; bank &= (bb8_rom_banks - 1); roml_bank = romh_bank = bank; /* printf("switch to mode: %s bank: %d\n", cart_config_string(mode), bank); */ cart_config_changed_slotmain(mode, mode | (bank << CMODE_BANK_SHIFT), CMODE_WRITE); } static int blackbox8_dump(void) { mon_out("Bank: %d of %d, mode: %s\n", ((regval >> 2) ^ 3) & (bb8_rom_banks - 1), bb8_rom_banks, cart_config_string((regval & 3) ^ 1)); return 0; } /* ---------------------------------------------------------------------*/ void blackbox8_config_init(void) { roml_bank = romh_bank = (bb8_rom_banks - 1); cart_config_changed_slotmain(CMODE_16KGAME, CMODE_16KGAME | (roml_bank << CMODE_BANK_SHIFT), CMODE_READ); } void blackbox8_config_setup(uint8_t *rawcart) { int i; for (i = 0; i <= bb8_rom_banks; i++) { memcpy(&roml_banks[0x2000 * i], &rawcart[0x0000 + (0x4000 * i)], 0x2000); memcpy(&romh_banks[0x2000 * i], &rawcart[0x2000 + (0x4000 * i)], 0x2000); } roml_bank = romh_bank = (bb8_rom_banks - 1); /* FIXME: Triggers false positive with the static analyzer: * "The result of the left shift is undefined because the left * operand is negative" */ cart_config_changed_slotmain(CMODE_16KGAME, CMODE_16KGAME | (roml_bank << CMODE_BANK_SHIFT), CMODE_READ); } /* ---------------------------------------------------------------------*/ static int blackbox8_common_attach(void) { if (export_add(&export_res_v3) < 0) { return -1; } final3_io2_list_item = io_source_register(&final3_io2_device); return 0; } int blackbox8_bin_attach(const char *filename, uint8_t *rawcart) { bb8_rom_banks = 2; if (util_file_load(filename, rawcart, 0x8000, UTIL_FILE_LOAD_SKIP_ADDRESS) < 0) { if (util_file_load(filename, rawcart, 0x10000, UTIL_FILE_LOAD_SKIP_ADDRESS) < 0) { return -1; } bb8_rom_banks = 4; } return blackbox8_common_attach(); } int blackbox8_crt_attach(FILE *fd, uint8_t *rawcart) { crt_chip_header_t chip; int i, banks = 0; for (i = 0; i <= 4; i++) { if (crt_read_chip_header(&chip, fd)) { break; } if (chip.bank > 4 || chip.size != 0x4000) { break; } if (crt_read_chip(rawcart, chip.bank << 14, &chip, fd)) { break; } ++banks; } if ((banks != 2) && (banks != 4)) { return -1; } bb8_rom_banks = banks; return blackbox8_common_attach(); } void blackbox8_detach(void) { export_remove(&export_res_v3); io_source_unregister(final3_io2_list_item); final3_io2_list_item = NULL; } /* ---------------------------------------------------------------------*/ /* CARTBB8 snapshot module format: type | name | version | description ------------------------------------------- BYTE | ROML banks | 1.1 | amount of ROML banks BYTE | register | 1.1 | register ARRAY | ROML | 1.1 | 32768 or 65536 BYTES of ROML data ARRAY | ROMH | 1.1 | 32768 or 65536 BYTES of ROML data */ static const char snap_module_name[] = "CARTBB8"; #define SNAP_MAJOR 1 #define SNAP_MINOR 1 int blackbox8_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)bb8_rom_banks) < 0 || SMW_B(m, regval) < 0 || SMW_BA(m, roml_banks, 0x2000 * bb8_rom_banks) < 0 || SMW_BA(m, romh_banks, 0x2000 * bb8_rom_banks) < 0) { snapshot_module_close(m); return -1; } return snapshot_module_close(m); } int blackbox8_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, &bb8_rom_banks) < 0 || SMR_B(m, ®val) < 0 || SMR_BA(m, roml_banks, 0x2000 * bb8_rom_banks) < 0 || SMR_BA(m, romh_banks, 0x2000 * bb8_rom_banks) < 0) { goto fail; } snapshot_module_close(m); return blackbox8_common_attach(); fail: snapshot_module_close(m); return -1; }