/* * ross.c - Cartridge handling, Ross cart. * * Written by * Marco van den Heuvel * * 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 "ross.h" #include "snapshot.h" #include "types.h" #include "util.h" #include "crt.h" /* "Ross" Cartridge - 16kb or 32kb ROM - 16Kb ROM mapped in at $8000-$BFFF in 16k game config - Any read access to $DE00 will switch in bank 1 (if cart is 32Kb). - Any read access to $DF00 will switch off EXROM and GAME. */ static int currbank = 0; static int ross_is_32k = 0; static uint8_t ross_io1_read(uint16_t addr) { if (ross_is_32k) { cart_romhbank_set_slotmain(1); cart_romlbank_set_slotmain(1); currbank = 1; } return 0; } static uint8_t ross_io_peek(uint16_t addr) { return 0; } static uint8_t ross_io2_read(uint16_t addr) { cart_set_port_exrom_slotmain(0); cart_set_port_game_slotmain(0); cart_port_config_changed_slotmain(); return 0; } static int ross_dump(void) { mon_out("Size: %s, bank: %d\n", (ross_is_32k) ? "32KiB" : "16KiB", currbank); return 0; } /* ---------------------------------------------------------------------*/ static io_source_t ross_io1_device = { CARTRIDGE_NAME_ROSS, /* name of the device */ IO_DETACH_CART, /* use cartridge ID to detach the device when involved in a read-collision */ IO_DETACH_NO_RESOURCE, /* does not use a resource for detach */ 0xde00, 0xdeff, 0xff, /* range for the device, address is ignored, reg:$de00, mirrors:$de01-$deff */ 0, /* read is never valid */ NULL, /* NO store function */ NULL, /* NO poke function */ ross_io1_read, /* read function */ ross_io_peek, /* peek function */ ross_dump, /* device state information dump function */ CARTRIDGE_ROSS, /* 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 ross_io2_device = { CARTRIDGE_NAME_ROSS, /* 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 ignore, reg:$df00, mirrors:$df01-$dfff */ 0, /* read is never valid */ NULL, /* NO store function */ NULL, /* NO poke function */ ross_io2_read, /* read function */ ross_io_peek, /* peek function */ ross_dump, /* device state information dump function */ CARTRIDGE_ROSS, /* 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 *ross_io1_list_item = NULL; static io_source_list_t *ross_io2_list_item = NULL; static const export_resource_t export_res = { CARTRIDGE_NAME_ROSS, 1, 1, &ross_io1_device, &ross_io2_device, CARTRIDGE_ROSS }; /* ---------------------------------------------------------------------*/ void ross_config_init(void) { cart_config_changed_slotmain(CMODE_16KGAME, CMODE_16KGAME, CMODE_READ); } void ross_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); cart_config_changed_slotmain(CMODE_8KGAME, CMODE_8KGAME, CMODE_READ); currbank = 0; } /* ---------------------------------------------------------------------*/ static int ross_common_attach(void) { if (export_add(&export_res) < 0) { return -1; } ross_io1_list_item = io_source_register(&ross_io1_device); ross_io2_list_item = io_source_register(&ross_io2_device); return 0; } int ross_bin_attach(const char *filename, uint8_t *rawcart) { if (util_file_load(filename, rawcart, 0x8000, UTIL_FILE_LOAD_SKIP_ADDRESS) < 0) { if (util_file_load(filename, rawcart, 0x4000, UTIL_FILE_LOAD_SKIP_ADDRESS) < 0) { return -1; } ross_is_32k = 0; } else { ross_is_32k = 1; } return ross_common_attach(); } int ross_crt_attach(FILE *fd, uint8_t *rawcart) { crt_chip_header_t chip; int amount = 0; while (1) { if (crt_read_chip_header(&chip, fd)) { break; } amount++; if (chip.start != 0x8000 || chip.size != 0x4000 || chip.bank > 1) { return -1; } if (crt_read_chip(rawcart, chip.bank << 14, &chip, fd)) { return -1; } } if (amount == 1) { ross_is_32k = 0; } else { ross_is_32k = 1; } return ross_common_attach(); } void ross_detach(void) { export_remove(&export_res); io_source_unregister(ross_io1_list_item); io_source_unregister(ross_io2_list_item); ross_io1_list_item = NULL; ross_io2_list_item = NULL; } /* ---------------------------------------------------------------------*/ /* CARTROSS snapshot module format: type | name | version | description ------------------------------------- BYTE | is32k | 0.1 | cart is 32KB flag BYTE | bank | 0.0+ | current bank ARRAY | ROML | 0.0+ | 16384 BYTES of ROML data ARRAY | ROMH | 0.0+ | 16384 BYTES of ROMH data */ static const char snap_module_name[] = "CARTROSS"; #define SNAP_MAJOR 0 #define SNAP_MINOR 1 int ross_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)ross_is_32k) < 0 || SMW_B(m, (uint8_t)currbank) < 0 || SMW_BA(m, roml_banks, 0x4000) < 0 || SMW_BA(m, romh_banks, 0x4000) < 0) { snapshot_module_close(m); return -1; } return snapshot_module_close(m); } int ross_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 0.1 */ if (!snapshot_version_is_smaller(vmajor, vminor, 0, 1)) { if (SMR_B_INT(m, &ross_is_32k) < 0) { goto fail; } } else { ross_is_32k = 0; } if (0 || SMR_B_INT(m, &currbank) < 0 || SMR_BA(m, roml_banks, 0x4000) < 0 || SMR_BA(m, romh_banks, 0x4000) < 0) { goto fail; } snapshot_module_close(m); return ross_common_attach(); fail: snapshot_module_close(m); return -1; }