/* * easycalc.c - Cartridge handling, Easy Calc Result 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 "cartridge.h" #include "crt.h" #include "easycalc.h" #include "export.h" #include "monitor.h" #include "snapshot.h" #include "types.h" #include "util.h" /* this cart uses 8Kb mapped in at $8000-$9FFF and 2 banks of 8Kb mapped in at $A000-$BFFF. the bank at $A000-$BFFF is selected by bit 0 of the address of a write access to I/O-1. A0 | bank --------- 0 | 0 1 | 1 */ /* some prototypes are needed */ static void easycalc_io1_store(uint16_t addr, uint8_t val); static int easycalc_dump(void); static io_source_t easycalc_device = { CARTRIDGE_NAME_EASYCALC, /* 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, regs:$de00-$de01, mirrors:$de02-$deff */ 0, /* read is never valid, device is write only */ easycalc_io1_store, /* store function */ NULL, /* NO poke function */ NULL, /* NO read function */ NULL, /* NO peek function */ easycalc_dump, /* device state information dump function */ CARTRIDGE_EASYCALC, /* 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 *easycalc_list_item = NULL; static const export_resource_t export_res_easycalc = { CARTRIDGE_NAME_EASYCALC, 1, 1, NULL, &easycalc_device, CARTRIDGE_EASYCALC }; /* ---------------------------------------------------------------------*/ void easycalc_config_init(void) { cart_config_changed_slotmain(CMODE_16KGAME, CMODE_16KGAME, CMODE_READ); } void easycalc_config_setup(uint8_t *rawcart) { memcpy(roml_banks, rawcart, 0x2000); memcpy(romh_banks, &rawcart[0x2000], 0x4000); cart_config_changed_slotmain(CMODE_16KGAME, CMODE_16KGAME, CMODE_READ); } static int easycalc_common_attach(void) { if (export_add(&export_res_easycalc) < 0) { return -1; } easycalc_list_item = io_source_register(&easycalc_device); return 0; } int easycalc_bin_attach(const char *filename, uint8_t *rawcart) { if (util_file_load(filename, rawcart, 0x6000, UTIL_FILE_LOAD_SKIP_ADDRESS) < 0) { return -1; } return easycalc_common_attach(); } int easycalc_crt_attach(FILE *fd, uint8_t *rawcart) { crt_chip_header_t chip; int i; /* first CHIP header holds $8000-$a000 data */ if (crt_read_chip_header(&chip, fd)) { return -1; } if (chip.start != 0x8000 || chip.size != 0x2000) { return -1; } if (crt_read_chip(rawcart, 0, &chip, fd)) { return -1; } /* second/third CHIP headers hold $a000-$c000 banked data */ for (i = 0; i <= 1; i++) { if (crt_read_chip_header(&chip, fd)) { return -1; } if (chip.start != 0xa000 || chip.size != 0x2000 || chip.bank > 1) { return -1; } if (crt_read_chip(rawcart, 0x2000 + (chip.bank << 13), &chip, fd)) { return -1; } } return easycalc_common_attach(); } void easycalc_detach(void) { export_remove(&export_res_easycalc); io_source_unregister(easycalc_list_item); easycalc_list_item = NULL; } /* ---------------------------------------------------------------------*/ static int curbank = 0; static void easycalc_io1_store(uint16_t addr, uint8_t val) { curbank = (addr & 1) ? 1 : 0; cart_romhbank_set_slotmain(curbank); } static int easycalc_dump(void) { mon_out("Bank: %d", curbank); return 0; } /* ---------------------------------------------------------------------*/ /* CARTEASYCALC snapshot module format: type | name | description -------------------------- ARRAY | ROML | 8192 BYTES of ROML data ARRAY | ROMH | 16384 BYTES of ROMH data */ static const char snap_module_name[] = "CARTEASYCALC"; #define SNAP_MAJOR 0 #define SNAP_MINOR 0 int easycalc_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_BA(m, roml_banks, 0x2000) < 0) || (SMW_BA(m, romh_banks, 0x4000) < 0)) { snapshot_module_close(m); return -1; } return snapshot_module_close(m); } int easycalc_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_BA(m, roml_banks, 0x2000) < 0) || (SMR_BA(m, romh_banks, 0x4000) < 0)) { goto fail; } snapshot_module_close(m); return easycalc_common_attach(); fail: snapshot_module_close(m); return -1; }