/* * hyperbasic.c - Cartridge handling, Hyper 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. * */ #define HYPERBASIC_DEBUG #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 "cmdline.h" #include "export.h" #include "log.h" #include "resources.h" #include "hyperbasic.h" #include "monitor.h" #include "snapshot.h" #include "types.h" #include "util.h" #include "crt.h" #ifdef HYPERBASIC_DEBUG #define DBG(x) printf x #else #define DBG(x) #endif /* "HYPERBASIC" 64k Cartridge by "SHS-BUDE" - 64Kb (8 banks) - ROM is always mapped in at $8000-$9FFF (8k game). - 1 register at io1 / de00: bit 0 - _CE for ROM2, 0 = enable (don't select both) bit 1 - _CE for ROM1, 0 = enable (don't select both) (bit 2 - probably unused) (bit 3 - probably unused) bit 4 - A13 bit 5 - A14 bit 6 and/or 7 - _EXROM, 0 = make cart visible */ #define NUMBANKS 8 static uint8_t regval = 0; static uint8_t disabled = 0; static uint8_t curr_bank = 0; static uint8_t enable1 = 0; static uint8_t enable2 = 0; static void hyperbasic_io1_store(uint16_t addr, uint8_t value) { regval = value; disabled = ((value >> 7) & 1) & ((value >> 6) & 1); enable1 = ((value >> 1) & 1) ^ 1; enable2 = (value & 1) ^ 1; curr_bank = (value >> 4) & 3; if (enable1 && enable2) { /* both ROMs selected */ log_message(LOG_DEFAULT, "Hyper-BASIC: WARNING! both ROMs are selected!"); cart_set_port_exrom_slotmain(0); /* FIXME: this is not really what happens */ } else if (!enable1 && !enable2) { /* no ROM is selected */ cart_set_port_exrom_slotmain(0); /* FIXME: this is not really what happens */ } else { /* FIXME: this is not really what happens */ curr_bank += (enable2 << 2); DBG(("hyperbasic_io1_store %04x %02x (disabled:%d rom1CE:%d rom2CE:%d bank:%d)\n", addr, value, disabled, enable1, enable2, curr_bank)); cart_set_port_exrom_slotmain(disabled ^ 1); cart_romlbank_set_slotmain(curr_bank); } cart_port_config_changed_slotmain(); } static uint8_t hyperbasic_io1_peek(uint16_t addr) { return regval; } static int hyperbasic_dump(void) { mon_out("Register: %02x\n", regval); mon_out("Cartridge is %s\n", disabled ? "disabled" : "enabled"); mon_out("ROM1: %s ROM2: %s (Bank: %d of 8)\n", enable1 ? "selected" : "deselected", enable2 ? "selected" : "deselected", curr_bank); return 0; } /* ---------------------------------------------------------------------*/ static io_source_t hyperbasic_device = { CARTRIDGE_NAME_HYPERBASIC, /* 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, reg is write only */ hyperbasic_io1_store, /* store function */ NULL, /* NO poke function */ NULL, /* NO read function */ hyperbasic_io1_peek, /* peek function */ hyperbasic_dump, /* device state information dump function */ CARTRIDGE_HYPERBASIC, /* 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 *hyperbasic_list_item = NULL; static const export_resource_t export_res = { CARTRIDGE_NAME_HYPERBASIC, 0, 1, &hyperbasic_device, NULL, CARTRIDGE_HYPERBASIC }; /* ---------------------------------------------------------------------*/ void hyperbasic_reset(void) { disabled = 0; cart_set_port_exrom_slotmain(1); } void hyperbasic_config_init(void) { disabled = 0; cart_config_changed_slotmain(CMODE_8KGAME + (3 << CMODE_BANK_SHIFT), CMODE_8KGAME + (3 << CMODE_BANK_SHIFT), CMODE_READ); } void hyperbasic_config_setup(uint8_t *rawcart) { memcpy(roml_banks, rawcart, 0x2000 * NUMBANKS); cart_config_changed_slotmain(CMODE_8KGAME + (3 << CMODE_BANK_SHIFT), CMODE_8KGAME + (3 << CMODE_BANK_SHIFT), CMODE_READ); } /* ---------------------------------------------------------------------*/ static int hyperbasic_common_attach(void) { if (export_add(&export_res) < 0) { return -1; } hyperbasic_list_item = io_source_register(&hyperbasic_device); return 0; } int hyperbasic_bin_attach(const char *filename, uint8_t *rawcart) { if (util_file_load(filename, rawcart, 0x10000, UTIL_FILE_LOAD_SKIP_ADDRESS) < 0) { return -1; } return hyperbasic_common_attach(); } int hyperbasic_crt_attach(FILE *fd, uint8_t *rawcart) { crt_chip_header_t chip; int highbank = 0; int numbanks = 0; while (1) { if (crt_read_chip_header(&chip, fd)) { break; } if ((chip.bank >= NUMBANKS) || ((chip.start != 0x8000) && (chip.start != 0xa000)) || (chip.size != 0x2000)) { return -1; } if (chip.bank > highbank) { highbank = chip.bank; } if (crt_read_chip(rawcart, chip.bank << 13, &chip, fd)) { return -1; } numbanks++; } if ((highbank != (NUMBANKS - 1)) || (numbanks != NUMBANKS)) { return -1; } return hyperbasic_common_attach(); } void hyperbasic_detach(void) { export_remove(&export_res); io_source_unregister(hyperbasic_list_item); hyperbasic_list_item = NULL; } /* ---------------------------------------------------------------------*/ /* CARTHYPERBASIC snapshot module format: type | name | version | description ----------------------------------------- BYTE | regval | 0.0 | register ARRAY | ROML | 0.0 | 65536 BYTES of ROML data */ static const char snap_module_name[] = "CARTHYPERBASIC"; #define SNAP_MAJOR 0 #define SNAP_MINOR 0 int hyperbasic_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)regval) < 0 || SMW_BA(m, roml_banks, 0x2000 * NUMBANKS) < 0) { snapshot_module_close(m); return -1; } return snapshot_module_close(m); } int hyperbasic_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 (SMR_B(m, ®val) < 0) { goto fail; } if (SMR_BA(m, roml_banks, 0x2000 * NUMBANKS) < 0) { goto fail; } snapshot_module_close(m); if (hyperbasic_common_attach() < 0) { return -1; } hyperbasic_io1_store(0xde00, regval); return 0; fail: snapshot_module_close(m); return -1; }