/* * prophet64.c - Cartridge handling, Prophet 64 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 "monitor.h" #include "prophet64.h" #include "snapshot.h" #include "types.h" #include "util.h" #include "crt.h" /* 32 banks, 8k each == 256kb banks are always mapped to $8000 controlregister is $df00 lower 5 bits ($00..$1f) selects bank bit 6 ($2x) disables cartridge */ #define PROPHET64_CART_SIZE (256 * 0x400) /* ---------------------------------------------------------------------*/ static int currbank = 0; static uint8_t regval = 0; static void p64_io2_store(uint16_t addr, uint8_t value) { regval = value; /* confirmation needed: register mirrored in entire io2 ? */ if ((value >> 5) & 1) { /* cartridge off */ cart_config_changed_slotmain(2, 2, CMODE_READ); } else { /* cartridge on */ cart_config_changed_slotmain(0, 0, CMODE_READ); } currbank = value & 0x1f; cart_romlbank_set_slotmain(value & 0x1f); } static uint8_t p64_io2_peek(uint16_t addr) { return regval; } static int p64_dump(void) { mon_out("Bank: %d\n", currbank); return 0; } /* ---------------------------------------------------------------------*/ static io_source_t p64_device = { CARTRIDGE_NAME_P64, /* name of the device */ IO_DETACH_CART, /* use cartridge ID to detach the device when involved in a read-collision */ IO_DETACH_NO_RESOURCE, /* does not use a resource for detach */ 0xdf00, 0xdfff, 0xff, /* range for the device, address is ignored, reg:$df00, mirrors:$df01-$dfff */ 0, /* read is never valid, reg is write only */ p64_io2_store, /* store function */ NULL, /* NO poke function */ NULL, /* NO read function */ p64_io2_peek, /* peek function */ p64_dump, /* device state information dump function */ CARTRIDGE_P64, /* 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 *p64_list_item = NULL; static const export_resource_t export_res = { CARTRIDGE_NAME_P64, 0, 1, NULL, &p64_device, CARTRIDGE_P64 }; /* ---------------------------------------------------------------------*/ void p64_config_init(void) { cart_config_changed_slotmain(CMODE_8KGAME, CMODE_8KGAME, CMODE_READ); cart_romlbank_set_slotmain(0); } void p64_config_setup(uint8_t *rawcart) { memcpy(roml_banks, rawcart, PROPHET64_CART_SIZE); cart_config_changed_slotmain(CMODE_8KGAME, CMODE_8KGAME, CMODE_READ); cart_romlbank_set_slotmain(0); } /* ---------------------------------------------------------------------*/ static int p64_common_attach(void) { if (export_add(&export_res) < 0) { return -1; } p64_list_item = io_source_register(&p64_device); return 0; } int p64_bin_attach(const char *filename, uint8_t *rawcart) { if (util_file_load(filename, rawcart, PROPHET64_CART_SIZE, UTIL_FILE_LOAD_SKIP_ADDRESS) < 0) { return -1; } return p64_common_attach(); } int p64_crt_attach(FILE *fd, uint8_t *rawcart) { crt_chip_header_t chip; int i; for (i = 0; i <= 0x1f; i++) { if (crt_read_chip_header(&chip, fd)) { break; } if (chip.bank > 0x1f || chip.size != 0x2000) { return -1; } if (crt_read_chip(rawcart, chip.bank << 13, &chip, fd)) { return -1; } } return p64_common_attach(); } void p64_detach(void) { export_remove(&export_res); io_source_unregister(p64_list_item); p64_list_item = NULL; } /* ---------------------------------------------------------------------*/ /* CARTP64 snapshot module format: type | name | version | description ---------------------------------------- BYTE | bank | 0.1 | current bank BYTE | register | 0.1 | register ARRAY | ROML | 0.0+ | 262144 BYTES of ROML data */ static const char snap_module_name[] = "CARTP64"; #define SNAP_MAJOR 0 #define SNAP_MINOR 1 int p64_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)currbank) < 0 || SMW_B(m, regval) < 0 || SMW_BA(m, roml_banks, PROPHET64_CART_SIZE) < 0) { snapshot_module_close(m); return -1; } return snapshot_module_close(m); } int p64_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 (0 || SMR_B_INT(m, &currbank) < 0 || SMR_B(m, ®val) < 0) { goto fail; } } else { currbank = 0; regval = 0; } if (SMR_BA(m, roml_banks, PROPHET64_CART_SIZE) < 0) { goto fail; } snapshot_module_close(m); return p64_common_attach(); fail: snapshot_module_close(m); return -1; }