/* * simonsbasic.c - Cartridge handling, Simons' Basic 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 "cartio.h" #include "cartridge.h" #include "export.h" #include "monitor.h" #include "simonsbasic.h" #include "snapshot.h" #include "types.h" #include "util.h" #include "crt.h" /* Simons' Basic Cartridge - 16kb ROM - reading io1 switches to 8k game config (bank 0 at $8000) - writing io1 switches to 16k game config (bank 0 at $8000, bank 1 at $a000) */ static int simon_a000 = 0; static uint8_t simon_io1_read(uint16_t addr) { cart_config_changed_slotmain(0, 0, CMODE_READ); simon_a000 = 0; return 0; } static uint8_t simon_io1_peek(uint16_t addr) { return 0; } static void simon_io1_store(uint16_t addr, uint8_t value) { cart_config_changed_slotmain(1, 1, CMODE_WRITE); simon_a000 = 1; } static int simon_dump(void) { mon_out("$8000-$9FFF ROM: enabled\n"); mon_out("$A000-$BFFF ROM: %s\n", (simon_a000) ? "enabled" : "disabled"); return 0; } /* ---------------------------------------------------------------------*/ static io_source_t simon_device = { CARTRIDGE_NAME_SIMONS_BASIC, /* name of the device */ IO_DETACH_CART, /* use cartridge ID to detach the device when involved in a read-collision */ IO_DETACH_NO_RESOURCE, /* does not use a resource for detach */ 0xde00, 0xdeff, 0xff, /* range for the device, address is ignored, reg:$de00, mirrors:$de01-$deff */ 0, /* read is never valid */ simon_io1_store, /* store function */ NULL, /* NO poke function */ simon_io1_read, /* read function */ simon_io1_peek, /* peek function */ simon_dump, /* device state information dump function */ CARTRIDGE_SIMONS_BASIC, /* 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 *simon_list_item = NULL; static const export_resource_t export_res_simon = { CARTRIDGE_NAME_SIMONS_BASIC, 1, 1, &simon_device, NULL, CARTRIDGE_SIMONS_BASIC }; /* ---------------------------------------------------------------------*/ void simon_config_init(void) { cart_config_changed_slotmain(CMODE_16KGAME, CMODE_16KGAME, CMODE_READ); simon_a000 = 1; } void simon_config_setup(uint8_t *rawcart) { memcpy(roml_banks, rawcart, 0x2000); memcpy(romh_banks, &rawcart[0x2000], 0x2000); cart_config_changed_slotmain(CMODE_16KGAME, CMODE_16KGAME, CMODE_READ); simon_a000 = 1; } static int simon_common_attach(void) { if (export_add(&export_res_simon) < 0) { return -1; } simon_list_item = io_source_register(&simon_device); return 0; } int simon_bin_attach(const char *filename, uint8_t *rawcart) { if (util_file_load(filename, rawcart, 0x4000, UTIL_FILE_LOAD_SKIP_ADDRESS) < 0) { return -1; } return simon_common_attach(); } int simon_crt_attach(FILE *fd, uint8_t *rawcart) { crt_chip_header_t chip; int i; for (i = 0; i <= 1; i++) { if (crt_read_chip_header(&chip, fd)) { return -1; } if ((chip.start != 0x8000 && chip.start != 0xa000) || chip.size != 0x2000) { return -1; } if (crt_read_chip(rawcart, chip.start - 0x8000, &chip, fd)) { return -1; } } return simon_common_attach(); } void simon_detach(void) { export_remove(&export_res_simon); io_source_unregister(simon_list_item); simon_list_item = NULL; } /* ---------------------------------------------------------------------*/ /* CARTSIMON snapshot module format: type | name | version | description ------------------------------------------- BYTE | a000 enable | 0.1 | ROM at $A000 flag ARRAY | ROML | 0.0+ | 8192 BYTES of ROML data ARRAY | ROMH | 0.0+ | 8192 BYTES of ROMH data */ static const char snap_module_name[] = "CARTSIMON"; #define SNAP_MAJOR 0 #define SNAP_MINOR 1 int simon_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)simon_a000) < 0 || SMW_BA(m, roml_banks, 0x2000) < 0 || SMW_BA(m, romh_banks, 0x2000) < 0) { snapshot_module_close(m); return -1; } return snapshot_module_close(m); } int simon_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, &simon_a000) < 0) { goto fail; } } else { simon_a000 = 0; } if (0 || SMR_BA(m, roml_banks, 0x2000) < 0 || SMR_BA(m, romh_banks, 0x2000) < 0) { goto fail; } snapshot_module_close(m); return simon_common_attach(); fail: snapshot_module_close(m); return -1; }