/* * warpspeed128.c -- "Warpspeed 128" cartridge emulation * * 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 #include "cartridge.h" #include "cartio.h" #include "util.h" #include "c64cart.h" #include "export.h" #include "c128cart.h" #include "functionrom.h" #include "crt.h" #include "warpspeed128.h" /* #define DBGWS */ #ifdef DBGWS #define DBG(x) printf x #else #define DBG(x) #endif /* Note: the actual cartridge contains both a C64 and a C128 ROM, which can be selected with a switch. We implement them as if these two ROMs were different cartridges - this way they can be selected by using the other .crt file, instead of having to flip the switch in the user interface. */ #define WARPSPEED_ROM_SIZE 0x4000 /* ---------------------------------------------------------------------*/ /* some prototypes are needed */ static uint8_t warpspeed128_io1_peek(uint16_t addr); static uint8_t warpspeed128_io1_read(uint16_t addr); static void warpspeed128_io1_store(uint16_t addr, uint8_t value); static uint8_t warpspeed128_io2_read(uint16_t addr); static uint8_t warpspeed128_io2_peek(uint16_t addr); static void warpspeed128_io2_store(uint16_t addr, uint8_t value); static int warpspeed128_dump(void); static io_source_t warpspeed128_io1_device = { CARTRIDGE_C128_NAME_WARPSPEED128, /* 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 by the write functions, reg:$de00, mirrors:$de01-$deff */ 1, /* read is never valid */ warpspeed128_io1_store, /* store function */ NULL, /* NO poke function */ warpspeed128_io1_read, /* read function */ warpspeed128_io1_peek, /* peek function */ warpspeed128_dump, /* device state information dump function */ CARTRIDGE_C128_WARPSPEED128, /* cartridge ID */ IO_PRIO_NORMAL, /* normal priority, device read needs to be checked for collisions */ 0, /* insertion order, gets filled in by the registration function */ IO_MIRROR_NONE /* NO mirroring */ }; static io_source_t warpspeed128_io2_device = { CARTRIDGE_C128_NAME_WARPSPEED128, /* name of the device */ IO_DETACH_CART, /* use cartridge ID to detach the device when involved in a read-collision */ IO_DETACH_NO_RESOURCE, /* does not use a resource for detach */ 0xdf00, 0xdfff, 0xff, /* range for the device, address is ignored by the read/write functions, reg:$df00, mirrors:$df01-$dfff */ 1, /* validity of the read is determined by the cartridge at read time */ warpspeed128_io2_store, /* store function */ NULL, /* NO poke function */ warpspeed128_io2_read, /* read function */ warpspeed128_io2_peek, /* peek function */ warpspeed128_dump, /* device state information dump function */ CARTRIDGE_C128_MAKEID(CARTRIDGE_C128_WARPSPEED128), /* 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 *warpspeed128_io1_list_item = NULL; static io_source_list_t *warpspeed128_io2_list_item = NULL; static const export_resource_t export_res = { CARTRIDGE_C128_NAME_WARPSPEED128, 1, 1, &warpspeed128_io1_device, &warpspeed128_io2_device, CARTRIDGE_C128_MAKEID(CARTRIDGE_C128_WARPSPEED128) }; /* ---------------------------------------------------------------------*/ static void warpspeed128_io1_store(uint16_t addr, uint8_t value) { DBG(("warpspeed128_io1_store %04x %02x\n", addr, value)); } static uint8_t warpspeed128_io1_read(uint16_t addr) { uint8_t value; value = ext_function_rom[0x1e00 + (addr & 0xff)]; DBG(("warpspeed128_io1_read %04x %02x\n", addr, value)); return value; } static uint8_t warpspeed128_io1_peek(uint16_t addr) { return ext_function_rom[0x1e00 + (addr & 0xff)]; } static uint8_t warpspeed128_io2_read(uint16_t addr) { uint8_t value; value = ext_function_rom[0x1f00 + (addr & 0xff)]; DBG(("warpspeed128_io2_read %04x %02x\n", addr, value)); return value; } static uint8_t warpspeed128_io2_peek(uint16_t addr) { return ext_function_rom[0x1f00 + (addr & 0xff)]; } static void warpspeed128_io2_store(uint16_t addr, uint8_t value) { DBG(("warpspeed128_io2_store %04x %02x\n", addr, value)); } static int warpspeed128_dump(void) { return 0; } /* ---------------------------------------------------------------------*/ void warpspeed128_config_setup(uint8_t *rawcart) { /* copy loaded cartridge data into actually used ROM array */ memcpy(&ext_function_rom[0], rawcart, EXTERNAL_FUNCTION_ROM_SIZE); } static int warpspeed128_common_attach(void) { /* setup i/o device */ if (export_add(&export_res) < 0) { return -1; } warpspeed128_io1_list_item = io_source_register(&warpspeed128_io1_device); warpspeed128_io2_list_item = io_source_register(&warpspeed128_io2_device); return 0; } int warpspeed128_bin_attach(const char *filename, uint8_t *rawcart) { if (util_file_load(filename, rawcart, WARPSPEED_ROM_SIZE, UTIL_FILE_LOAD_SKIP_ADDRESS) < 0) { return -1; } memcpy(rawcart + WARPSPEED_ROM_SIZE, rawcart, WARPSPEED_ROM_SIZE); return warpspeed128_common_attach(); } /* returns -1 on error, else a positive CRT ID */ int warpspeed128_crt_attach(FILE *fd, uint8_t *rawcart) { crt_chip_header_t chip; if (crt_read_chip_header(&chip, fd)) { return -1; } DBG(("chip1 at %02x len %02x\n", chip.start, chip.size)); if (chip.start == 0x8000 && chip.size == 0x4000) { if (crt_read_chip(rawcart, 0, &chip, fd)) { return -1; } memcpy(rawcart + WARPSPEED_ROM_SIZE, rawcart, WARPSPEED_ROM_SIZE); return warpspeed128_common_attach(); } return -1; } void warpspeed128_detach(void) { if (warpspeed128_io1_list_item) { io_source_unregister(warpspeed128_io1_list_item); warpspeed128_io1_list_item = NULL; } if (warpspeed128_io2_list_item) { io_source_unregister(warpspeed128_io2_list_item); warpspeed128_io2_list_item = NULL; } export_remove(&export_res); } void warpspeed128_reset(void) { DBG(("warpspeed128_reset\n")); } /* ---------------------------------------------------------------------*/ /* WARPSPEED128 snapshot module format: FIXME */ static char snap_module_name[] = "WARPSPEED128"; #define SNAP_MAJOR 0 #define SNAP_MINOR 1 int warpspeed128_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, ext_function_rom, WARPSPEED_ROM_SIZE) < 0)) { snapshot_module_close(m); return -1; } return snapshot_module_close(m); } int warpspeed128_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, ext_function_rom, WARPSPEED_ROM_SIZE) < 0)) { goto fail; } snapshot_module_close(m); return warpspeed128_common_attach(); fail: snapshot_module_close(m); return -1; }