/* * blackbox9.c - Cartridge handling, Black BOX 9 cart. * * Written by * Kamil Zbrog * Based on code written by * Artur Sidor * Based on code from VICE written by * ALeX Kazik * Marco van den Heuvel * Andreas Boose * 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 "blackbox9.h" #include "monitor.h" #include "snapshot.h" #include "types.h" #include "util.h" #include "crt.h" #include "log.h" #include "vicii-phi1.h" /* Black BOX 9 - 32k ROM, 2*16k (16K Game mode) - starts from bank 1 in ultimax mode - cart ROM mirror is visible in IO1 A register is mapped to IO1, which is changed by accessing an address in the IO space, the address bits are mapped like this: bit 7 - bank (inverted on write) bit 6 - exrom bit 0 - game GUESS: The register will be disabled (until reset) when the following conditions are met: - read from io1 - addr bit 7 is 0 - addr bit 6 is 1 - addr bit 0 is 1 */ /* #define BB9DEBUG */ #ifdef BB9DEBUG #define DBG(x) log_printf x #else #define DBG(x) #endif /* some prototypes are needed */ static uint8_t blackbox9_io1_peek(uint16_t addr); static uint8_t blackbox9_io1_read(uint16_t addr); static void blackbox9_io1_store(uint16_t addr, uint8_t); static int blackbox9_dump(void); static io_source_t io1_device = { CARTRIDGE_NAME_BLACKBOX9, /* 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:$de00-$deff */ 1, /* read is always valid */ blackbox9_io1_store, /* store function */ NULL, /* NO poke function */ blackbox9_io1_read, /* read function */ blackbox9_io1_peek, /* peek function */ blackbox9_dump, /* device state information dump function */ CARTRIDGE_BLACKBOX9, /* 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 *io1_list_item = NULL; static const export_resource_t export_res = { CARTRIDGE_NAME_BLACKBOX9, 1, 1, &io1_device, NULL, CARTRIDGE_BLACKBOX9 }; /* ---------------------------------------------------------------------*/ static int currbank = 0; static int currmode = 0; static int cart_enabled = 0; static uint8_t blackbox9_io1_peek(uint16_t addr) { return roml_banks[0x1e00 + (roml_bank << 13) + (addr & 0xff)]; } static uint8_t blackbox9_io1_read(uint16_t addr) { if (cart_enabled) { currbank = (addr >> 7) & 1; currmode = ((addr >> 5) & 2) | ((addr & 1) ^ 1); /* weird hack to prevent ultimax mode in the powerup screen */ if ((currmode == CMODE_ULTIMAX) && ((addr & 0x40) == 0x40) && ((addr & 0x01) == 0x00)) { DBG(("ultimax mode ignored")); } else { cart_config_changed_slotmain(CMODE_RAM, (currbank << CMODE_BANK_SHIFT) | currmode, CMODE_READ); } if (addr == 0x41) { cart_enabled = 0; DBG(("disabling cart")); } #if 0 if ((addr != 0x41) && ((currbank == 0) && (currmode == 3))) { DBG(("IO1 read %04x value:%02x bank:%d mode:%d", addr, roml_banks[0x1e00 + (roml_bank << 13) + (addr & 0xff)], currbank, currmode)); } #endif return roml_banks[0x1e00 + (roml_bank << 13) + (addr & 0xff)]; } return vicii_read_phi1(); } void blackbox9_io1_store(uint16_t addr, uint8_t val) { if (cart_enabled) { currbank = ((addr >> 7) & 1) ^ 1; currmode = ((addr >> 5) & 2) | ((addr & 1) ^ 1); DBG(("IO1 store %04x val:%02x bank:%d mode:%d", addr, val, currbank, currmode)); cart_config_changed_slotmain(CMODE_RAM, (currbank << CMODE_BANK_SHIFT) | currmode, CMODE_WRITE); } } static int blackbox9_dump(void) { mon_out("current mode: %s\n", cart_config_string(currmode)); mon_out("IO at $DE00-$DEFF: %s\n", cart_enabled ? "enabled" : "disabled"); mon_out("ROM at $8000-$BFFF: %s\n", (currmode != CMODE_RAM) ? "enabled" : "disabled"); mon_out("ROM bank: %d\n", currbank); return 0; } /* ---------------------------------------------------------------------*/ void blackbox9_config_init(void) { DBG(("blackbox9_config_init")); currmode = CMODE_ULTIMAX; currbank = 1; cart_enabled = 1; cart_config_changed_slotmain(CMODE_RAM, currmode | 1 << CMODE_BANK_SHIFT, CMODE_READ); } void blackbox9_config_setup(uint8_t *rawcart) { int i; DBG(("blackbox9_config_setup")); for (i = 0; i <= 2; i++) { memcpy(&roml_banks[0x2000 * i], &rawcart[0x0000 + (0x4000 * i)], 0x2000); memcpy(&romh_banks[0x2000 * i], &rawcart[0x2000 + (0x4000 * i)], 0x2000); } currmode = CMODE_ULTIMAX; currbank = 1; cart_enabled = 1; cart_config_changed_slotmain(CMODE_RAM, currmode | 1 << CMODE_BANK_SHIFT, CMODE_READ); } /* ---------------------------------------------------------------------*/ static int blackbox9_common_attach(void) { if (export_add(&export_res) < 0) { return -1; } io1_list_item = io_source_register(&io1_device); return 0; } int blackbox9_bin_attach(const char *filename, uint8_t *rawcart) { if (util_file_load(filename, rawcart, 0x8000, UTIL_FILE_LOAD_SKIP_ADDRESS) < 0) { return -1; } return blackbox9_common_attach(); } int blackbox9_crt_attach(FILE *fd, uint8_t *rawcart) { crt_chip_header_t chip; int i, banks = 0; for (i = 0; i <= 2; i++) { if (crt_read_chip_header(&chip, fd)) { break; } if (chip.bank > 2 || chip.size != 0x4000) { break; } if (crt_read_chip(rawcart, chip.bank << 14, &chip, fd)) { break; } ++banks; } if (banks != 2) { return -1; } return blackbox9_common_attach(); } void blackbox9_detach(void) { export_remove(&export_res); io_source_unregister(io1_list_item); io1_list_item = NULL; } /* ---------------------------------------------------------------------*/ static const char snap_module_name[] = "CARTBLACKBOX9"; #define SNAP_MAJOR 0 #define SNAP_MINOR 1 int blackbox9_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)currmode) < 0) || (SMW_B(m, (uint8_t)currbank) < 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 blackbox9_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 (vmajor > SNAP_MAJOR || vminor > SNAP_MINOR) { snapshot_set_error(SNAPSHOT_MODULE_HIGHER_VERSION); goto fail; } if (0 || (SMR_B_INT(m, &currmode) < 0) || (SMR_B_INT(m, &currbank) < 0) || (SMR_BA(m, roml_banks, 0x2000) < 0) || (SMR_BA(m, romh_banks, 0x2000) < 0)) { goto fail; } snapshot_module_close(m); return blackbox9_common_attach(); fail: snapshot_module_close(m); return -1; }