/* * snapshot64.c - Cartridge handling, Snapshot64 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 #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 "snapshot.h" #include "snapshot64.h" #include "types.h" #include "util.h" #include "crt.h" /* Snapshot 64 (LMS Technologies) FIXME: this implementation is purely based on guesswork - 4K ROM (2732) - mapped to 8000 and e000 (ultimax mode) ? - NE555, 7406, 7474 - one button (freeze) io2 - df00 (r/w) - any read access seems to disable the cartridge (the snapshot64 software uses inc $df00 in a loop to switch) after reset NO menu is shown. when pressing freeze the screen goes blank, then return - starts the "code inspector" l - load and execute ml program j - jump to address d - dump memory (hex) e - return to basic f1 - analyze and save backup f3 - clear memory f5 - format disk f7 - restart */ /* #define SS64DEBUG */ #ifdef SS64DEBUG #define DBG(x) printf x #else #define DBG(x) #endif static uint8_t romconfig = 0; /* ---------------------------------------------------------------------*/ /* some prototypes are needed */ static uint8_t snapshot64_io2_read(uint16_t addr); static uint8_t snapshot64_io2_peek(uint16_t addr); static void snapshot64_io2_store(uint16_t addr, uint8_t value); static io_source_t ss64_io2_device = { CARTRIDGE_NAME_SNAPSHOT64, /* name of the device */ IO_DETACH_CART, /* use cartridge ID to detach the device when involved in a read-collision */ IO_DETACH_NO_RESOURCE, /* does not use a resource for detach */ 0xdf00, 0xdfff, 0xff, /* range for the device, address is ignored, reg:$df00, mirrors:$df01-$dfff */ 0, /* read is never valid */ snapshot64_io2_store, /* store function */ NULL, /* NO poke function */ snapshot64_io2_read, /* read function */ snapshot64_io2_peek, /* peek function */ NULL, /* TODO: device state information dump function */ CARTRIDGE_SNAPSHOT64, /* 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 *ss64_io2_list_item = NULL; static const export_resource_t export_res = { CARTRIDGE_NAME_SNAPSHOT64, 1, 1, NULL, &ss64_io2_device, CARTRIDGE_SNAPSHOT64 }; /* ---------------------------------------------------------------------*/ static void enable_rom(int enable, int mode) { romconfig = enable; if (enable == 0) { cart_config_changed_slotmain(CMODE_RAM, CMODE_RAM, mode); } else { cart_config_changed_slotmain(CMODE_ULTIMAX, CMODE_ULTIMAX, mode); } } uint8_t snapshot64_io2_read(uint16_t addr) { /* DBG(("io2 rd %04x (%02x)\n", addr, romconfig)); */ return 0; } uint8_t snapshot64_io2_peek(uint16_t addr) { return romconfig; } void snapshot64_io2_store(uint16_t addr, uint8_t value) { /* DBG(("io2 wr %04x %02x\n", addr, value)); */ enable_rom(0, CMODE_WRITE); } /* ---------------------------------------------------------------------*/ uint8_t snapshot64_roml_read(uint16_t addr) { return roml_banks[addr & 0x0fff]; } uint8_t snapshot64_romh_read(uint16_t addr) { return roml_banks[addr & 0x0fff]; } /* ---------------------------------------------------------------------*/ void snapshot64_freeze(void) { DBG(("SNAPSHOT64: freeze\n")); enable_rom(1, CMODE_READ | CMODE_RELEASE_FREEZE); } void snapshot64_config_init(void) { DBG(("SNAPSHOT64: config_init\n")); enable_rom(0, CMODE_READ); } void snapshot64_config_setup(uint8_t *rawcart) { DBG(("SNAPSHOT64: config setup\n")); memcpy(&roml_banks[0x0000], &rawcart[0x0000], 0x1000); enable_rom(0, CMODE_READ); } /* ---------------------------------------------------------------------*/ static int snapshot64_common_attach(void) { if (export_add(&export_res) < 0) { return -1; } ss64_io2_list_item = io_source_register(&ss64_io2_device); return 0; } int snapshot64_bin_attach(const char *filename, uint8_t *rawcart) { if (util_file_load(filename, rawcart, 0x1000, UTIL_FILE_LOAD_SKIP_ADDRESS) < 0) { return -1; } return snapshot64_common_attach(); } int snapshot64_crt_attach(FILE *fd, uint8_t *rawcart) { crt_chip_header_t chip; if (crt_read_chip_header(&chip, fd)) { return -1; } if (chip.bank > 0 || chip.size != 0x1000) { return -1; } if (crt_read_chip(rawcart, 0, &chip, fd)) { return -1; } return snapshot64_common_attach(); } void snapshot64_detach(void) { export_remove(&export_res); io_source_unregister(ss64_io2_list_item); ss64_io2_list_item = NULL; } /* ---------------------------------------------------------------------*/ /* CARTSNAP64 snapshot module format: type | name | description -------------------------------- BYTE | ROM config | ROM configuration ARRAY | ROML | 4096 BYTES of ROML data */ static const char snap_module_name[] = "CARTSNAP64"; #define SNAP_MAJOR 0 #define SNAP_MINOR 0 int snapshot64_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, romconfig) < 0 || SMW_BA(m, roml_banks, 0x1000) < 0) { snapshot_module_close(m); return -1; } return snapshot_module_close(m); } int snapshot64_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(m, &romconfig) < 0 || SMR_BA(m, roml_banks, 0x1000) < 0) { goto fail; } snapshot_module_close(m); return snapshot64_common_attach(); fail: snapshot_module_close(m); return -1; }