/* gb.c - Game Boy support for uCON64 Copyright (c) 1999 - 2001 NoisyB Copyright (c) 2001 - 2004 dbjh 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include #ifdef HAVE_UNISTD_H #include #endif #include #include "misc/file.h" #include "misc/misc.h" #include "misc/string.h" #ifdef USE_ZLIB #include "misc/archive.h" #endif #include "misc/getopt2.h" // st_getopt2_t #include "ucon64.h" #include "ucon64_misc.h" #include "console/nes.h" #include "backup/gbx.h" #include "backup/mgd.h" #include "backup/ssc.h" #include "patch/ips.h" #include "patch/bsl.h" #include "gb.h" #define GAMEBOY_HEADER_START 0x100 #define GAMEBOY_HEADER_LEN (sizeof (st_gameboy_header_t)) #define GB_NAME_LEN 15 const st_getopt2_t gameboy_usage[] = { { NULL, 0, 0, 0, NULL, "Game Boy/(Super GB)/GB Pocket/Color GB/(GB Advance)" /*"1989/1994/1996/1998/2001 Nintendo http://www.nintendo.com"*/, NULL }, { "gb", 0, 0, UCON64_GB, NULL, "force recognition", &ucon64_wf[WF_OBJ_GB_SWITCH] }, { "n", 1, 0, UCON64_N, "NEW_NAME", "change internal ROM name to NEW_NAME", &ucon64_wf[WF_OBJ_ALL_DEFAULT] }, { "logo", 0, 0, UCON64_LOGO, NULL, "restore ROM logo character data (offset: 0x104-0x134)", &ucon64_wf[WF_OBJ_ALL_DEFAULT] }, { "mgd", 0, 0, UCON64_MGD, NULL, "convert to Multi Game*/MGD2/RAW", &ucon64_wf[WF_OBJ_ALL_DEFAULT] }, { "ssc", 0, 0, UCON64_SSC, NULL, "convert to Super Smart Card/SSC", &ucon64_wf[WF_OBJ_GB_DEFAULT] }, { "sgb", 0, 0, UCON64_SGB, NULL, "convert from GB Xchanger/GB/GBC to Super Backup Card/GX/GBX", &ucon64_wf[WF_OBJ_GB_DEFAULT] }, { "gbx", 0, 0, UCON64_GBX, NULL, "convert from Super Backup Card/GX/GBX to GB Xchanger/GB/GBC", &ucon64_wf[WF_OBJ_GB_DEFAULT] }, { "n2gb", 1, 0, UCON64_N2GB, "NESROM", "KAMI's FC EMUlator (NES emulator);\n" "ROM should be KAMI's FC Emulator ROM image\n" "NESROM should contain 16 kB of PRG data and 8 kB of CHR data", &ucon64_wf[WF_OBJ_GB_DEFAULT] }, { "chk", 0, 0, UCON64_CHK, NULL, "fix ROM checksum", &ucon64_wf[WF_OBJ_ALL_DEFAULT] }, {NULL, 0, 0, 0, NULL, NULL, NULL} }; /* 0148 ROM size: 0 - 256kBit = 32kB = 2 banks 1 - 512kBit = 64kB = 4 banks 2 - 1Mb = 128kB = 8 banks 3 - 2Mb = 256kB = 16 banks 4 - 4Mb = 512kB = 32 banks 0149 RAM size: 0 - None 1 - 16kBit = 2kB = 1 bank 2 - 64kBit = 8kB = 1 bank 3 - 256kBit = 32kB = 4 banks */ typedef struct st_gameboy_header { unsigned char opcode1; // 0x00 usually 0x00, NOP unsigned char opcode2; // 0x01 usually 0xc3, JP unsigned char start_low; // 0x02 first byte of parameter of JP unsigned char start_high; // 0x03 second byte unsigned char logo[GB_LOGODATA_LEN]; // 0x04 unsigned char name[GB_NAME_LEN]; // 0x34 unsigned char gb_type; // 0x43 unsigned char maker_high; // 0x44 unsigned char maker_low; // 0x45 unsigned char pad; unsigned char rom_type; // 0x47 unsigned char rom_size; // 0x48 unsigned char sram_size; // 0x49 unsigned char country; // 0x4a unsigned char maker; // 0x4b unsigned char version; // 0x4c unsigned char header_checksum; // 0x4d unsigned char checksum_high; // 0x4e unsigned char checksum_low; // 0x4f } st_gameboy_header_t; static st_gameboy_header_t gameboy_header; const unsigned char gb_logodata[] = // Note: not a static variable { 0xce, 0xed, 0x66, 0x66, 0xcc, 0x0d, 0x00, 0x0b, 0x03, 0x73, 0x00, 0x83, 0x00, 0x0c, 0x00, 0x0d, 0x00, 0x08, 0x11, 0x1f, 0x88, 0x89, 0x00, 0x0e, 0xdc, 0xcc, 0x6e, 0xe6, 0xdd, 0xdd, 0xd9, 0x99, 0xbb, 0xbb, 0x67, 0x63, 0x6e, 0x0e, 0xec, 0xcc, 0xdd, 0xdc, 0x99, 0x9f, 0xbb, 0xb9, 0x33, 0x3e }, rocket_logodata[] = // idem { 0x11, 0x23, 0xf1, 0x1e, 0x01, 0x22, 0xf0, 0x00, 0x08, 0x99, 0x78, 0x00, 0x08, 0x11, 0x9a, 0x48, 0x11, 0x23, 0xf0, 0x0e, 0x70, 0x01, 0xf8, 0x80, 0x22, 0x44, 0x44, 0x22, 0x22, 0x21, 0x00, 0x1e, 0x99, 0x10, 0x00, 0x1e, 0x19, 0x22, 0x44, 0x22, 0x22, 0x47, 0x00, 0x0e, 0x11, 0x22, 0x00, 0x00 }; typedef struct st_gameboy_chksum { unsigned short value; unsigned char header; } st_gameboy_chksum_t; static st_gameboy_chksum_t checksum; static st_gameboy_chksum_t gameboy_chksum (st_rominfo_t *rominfo); int gameboy_logo (st_rominfo_t *rominfo) { char dest_name[FILENAME_MAX]; strcpy (dest_name, ucon64.rom); ucon64_file_handler (dest_name, NULL, 0); fcopy (ucon64.rom, 0, ucon64.file_size, dest_name, "wb"); ucon64_fwrite ((unsigned char *) ((gameboy_header.rom_type >= 0x97 && gameboy_header.rom_type <= 0x99) ? rocket_logodata : gb_logodata), rominfo->buheader_len + GAMEBOY_HEADER_START + 4, GB_LOGODATA_LEN, dest_name, "r+b"); printf (ucon64_msg[WROTE], dest_name); return 0; } int gameboy_n2gb (st_rominfo_t *rominfo, const char *nesrom) { #define EMULATOR_LEN 0x10000 st_ines_header_t ines_header; int n = 0, crc = 0; unsigned char *buf; char dest_name[FILENAME_MAX]; if (ucon64.file_size - rominfo->buheader_len != EMULATOR_LEN) { fprintf (stderr, "ERROR: %s does not appear to be KAMI's FC emulator\n", ucon64.rom); return -1; } ucon64_fread (&ines_header, 0, INES_HEADER_LEN, nesrom); if (memcmp (ines_header.signature, INES_SIG_S, 4)) { fprintf (stderr, "ERROR: Only NES ROMs with iNES header are supported\n"); return -1; } if (ines_header.prg_size != 1 || ines_header.chr_size != 1) { fprintf (stderr, "ERROR: Only NES ROMs with 0.1250 Mb of ROM (PRG) and 0.0625 Mb of VROM (CHR)\n" " are supported by KAMI's FC emulator\n"); return -1; } if (!(buf = (unsigned char *) malloc (ucon64.file_size))) { fprintf (stderr, ucon64_msg[ROM_BUFFER_ERROR], ucon64.file_size); return -1; } ucon64_fread (buf, 0, ucon64.file_size, ucon64.rom); ucon64_fread (rominfo->buheader_len + buf + 0x4000, INES_HEADER_LEN, 0x4000 + 0x2000, nesrom); // read PRG & CHR data for (n = 0; n < ucon64.file_size - rominfo->buheader_len; n++) { if ((n == GAMEBOY_HEADER_START + 0x4e) || (n == GAMEBOY_HEADER_START + 0x4f)) continue; else crc += buf[rominfo->buheader_len + n]; } buf[rominfo->buheader_len + GAMEBOY_HEADER_START + 0x4e] = crc >> 8; buf[rominfo->buheader_len + GAMEBOY_HEADER_START + 0x4f] = crc; strcpy (dest_name, ucon64.rom); ucon64_file_handler (dest_name, NULL, 0); ucon64_fwrite (buf, 0, ucon64.file_size, dest_name, "wb"); free (buf); printf (ucon64_msg[WROTE], dest_name); return 0; } static int gameboy_convert_data (st_rominfo_t *rominfo, unsigned char *conversion_table, const char *suffix) { char dest_name[FILENAME_MAX], src_name[FILENAME_MAX]; unsigned char buf[MAXBUFSIZE]; int x, n, n_bytes; strcpy (src_name, ucon64.rom); strcpy (dest_name, ucon64.rom); set_suffix (dest_name, suffix); ucon64_file_handler (dest_name, src_name, 0); x = rominfo->buheader_len; while ((n_bytes = ucon64_fread (buf, x, MAXBUFSIZE, src_name))) { for (n = 0; n < n_bytes; n++) buf[n] = conversion_table[(int) buf[n]]; ucon64_fwrite (buf, x, n_bytes, dest_name, x == rominfo->buheader_len ? "wb" : "ab"); x += n_bytes; } printf (ucon64_msg[WROTE], dest_name); return 0; } int gameboy_gbx (st_rominfo_t *rominfo) { unsigned char gbx2gbc[] = { 0xB4, 0xBC, 0xA4, 0xAC, 0x94, 0x9C, 0x84, 0x8C, 0xF4, 0xFC, 0xE4, 0xEC, 0xD4, 0xDC, 0xC4, 0xCC, 0x34, 0x3C, 0x24, 0x2C, 0x14, 0x1C, 0x04, 0x0C, 0x74, 0x7C, 0x64, 0x6C, 0x54, 0x5C, 0x44, 0x4C, 0xB5, 0xBD, 0xA5, 0xAD, 0x95, 0x9D, 0x85, 0x8D, 0xF5, 0xFD, 0xE5, 0xED, 0xD5, 0xDD, 0xC5, 0xCD, 0x35, 0x3D, 0x25, 0x2D, 0x15, 0x1D, 0x05, 0x0D, 0x75, 0x7D, 0x65, 0x6D, 0x55, 0x5D, 0x45, 0x4D, 0xB6, 0xBE, 0xA6, 0xAE, 0x96, 0x9E, 0x86, 0x8E, 0xF6, 0xFE, 0xE6, 0xEE, 0xD6, 0xDE, 0xC6, 0xCE, 0x36, 0x3E, 0x26, 0x2E, 0x16, 0x1E, 0x06, 0x0E, 0x76, 0x7E, 0x66, 0x6E, 0x56, 0x5E, 0x46, 0x4E, 0xB7, 0xBF, 0xA7, 0xAF, 0x97, 0x9F, 0x87, 0x8F, 0xF7, 0xFF, 0xE7, 0xEF, 0xD7, 0xDF, 0xC7, 0xCF, 0x37, 0x3F, 0x27, 0x2F, 0x17, 0x1F, 0x07, 0x0F, 0x77, 0x7F, 0x67, 0x6F, 0x57, 0x5F, 0x47, 0x4F, 0xB0, 0xB8, 0xA0, 0xA8, 0x90, 0x98, 0x80, 0x88, 0xF0, 0xF8, 0xE0, 0xE8, 0xD0, 0xD8, 0xC0, 0xC8, 0x30, 0x38, 0x20, 0x28, 0x10, 0x18, 0x00, 0x08, 0x70, 0x78, 0x60, 0x68, 0x50, 0x58, 0x40, 0x48, 0xB1, 0xB9, 0xA1, 0xA9, 0x91, 0x99, 0x81, 0x89, 0xF1, 0xF9, 0xE1, 0xE9, 0xD1, 0xD9, 0xC1, 0xC9, 0x31, 0x39, 0x21, 0x29, 0x11, 0x19, 0x01, 0x09, 0x71, 0x79, 0x61, 0x69, 0x51, 0x59, 0x41, 0x49, 0xB2, 0xBA, 0xA2, 0xAA, 0x92, 0x9A, 0x82, 0x8A, 0xF2, 0xFA, 0xE2, 0xEA, 0xD2, 0xDA, 0xC2, 0xCA, 0x32, 0x3A, 0x22, 0x2A, 0x12, 0x1A, 0x02, 0x0A, 0x72, 0x7A, 0x62, 0x6A, 0x52, 0x5A, 0x42, 0x4A, 0xB3, 0xBB, 0xA3, 0xAB, 0x93, 0x9B, 0x83, 0x8B, 0xF3, 0xFB, 0xE3, 0xEB, 0xD3, 0xDB, 0xC3, 0xCB, 0x33, 0x3B, 0x23, 0x2B, 0x13, 0x1B, 0x03, 0x0B, 0x73, 0x7B, 0x63, 0x6B, 0x53, 0x5B, 0x43, 0x4B }; const char *old_suffix = get_suffix (ucon64.rom), *new_suffix; new_suffix = stricmp (old_suffix, ".GBX") ? ".GB" : ".GBC"; return gameboy_convert_data (rominfo, gbx2gbc, new_suffix); } int gameboy_sgb (st_rominfo_t *rominfo) { unsigned char gbc2gbx[] = { 0x96, 0xB6, 0xD6, 0xF6, 0x16, 0x36, 0x56, 0x76, 0x97, 0xB7, 0xD7, 0xF7, 0x17, 0x37, 0x57, 0x77, 0x94, 0xB4, 0xD4, 0xF4, 0x14, 0x34, 0x54, 0x74, 0x95, 0xB5, 0xD5, 0xF5, 0x15, 0x35, 0x55, 0x75, 0x92, 0xB2, 0xD2, 0xF2, 0x12, 0x32, 0x52, 0x72, 0x93, 0xB3, 0xD3, 0xF3, 0x13, 0x33, 0x53, 0x73, 0x90, 0xB0, 0xD0, 0xF0, 0x10, 0x30, 0x50, 0x70, 0x91, 0xB1, 0xD1, 0xF1, 0x11, 0x31, 0x51, 0x71, 0x9E, 0xBE, 0xDE, 0xFE, 0x1E, 0x3E, 0x5E, 0x7E, 0x9F, 0xBF, 0xDF, 0xFF, 0x1F, 0x3F, 0x5F, 0x7F, 0x9C, 0xBC, 0xDC, 0xFC, 0x1C, 0x3C, 0x5C, 0x7C, 0x9D, 0xBD, 0xDD, 0xFD, 0x1D, 0x3D, 0x5D, 0x7D, 0x9A, 0xBA, 0xDA, 0xFA, 0x1A, 0x3A, 0x5A, 0x7A, 0x9B, 0xBB, 0xDB, 0xFB, 0x1B, 0x3B, 0x5B, 0x7B, 0x98, 0xB8, 0xD8, 0xF8, 0x18, 0x38, 0x58, 0x78, 0x99, 0xB9, 0xD9, 0xF9, 0x19, 0x39, 0x59, 0x79, 0x86, 0xA6, 0xC6, 0xE6, 0x06, 0x26, 0x46, 0x66, 0x87, 0xA7, 0xC7, 0xE7, 0x07, 0x27, 0x47, 0x67, 0x84, 0xA4, 0xC4, 0xE4, 0x04, 0x24, 0x44, 0x64, 0x85, 0xA5, 0xC5, 0xE5, 0x05, 0x25, 0x45, 0x65, 0x82, 0xA2, 0xC2, 0xE2, 0x02, 0x22, 0x42, 0x62, 0x83, 0xA3, 0xC3, 0xE3, 0x03, 0x23, 0x43, 0x63, 0x80, 0xA0, 0xC0, 0xE0, 0x00, 0x20, 0x40, 0x60, 0x81, 0xA1, 0xC1, 0xE1, 0x01, 0x21, 0x41, 0x61, 0x8E, 0xAE, 0xCE, 0xEE, 0x0E, 0x2E, 0x4E, 0x6E, 0x8F, 0xAF, 0xCF, 0xEF, 0x0F, 0x2F, 0x4F, 0x6F, 0x8C, 0xAC, 0xCC, 0xEC, 0x0C, 0x2C, 0x4C, 0x6C, 0x8D, 0xAD, 0xCD, 0xED, 0x0D, 0x2D, 0x4D, 0x6D, 0x8A, 0xAA, 0xCA, 0xEA, 0x0A, 0x2A, 0x4A, 0x6A, 0x8B, 0xAB, 0xCB, 0xEB, 0x0B, 0x2B, 0x4B, 0x6B, 0x88, 0xA8, 0xC8, 0xE8, 0x08, 0x28, 0x48, 0x68, 0x89, 0xA9, 0xC9, 0xE9, 0x09, 0x29, 0x49, 0x69 }; const char *old_suffix = get_suffix (ucon64.rom), *new_suffix; new_suffix = stricmp (old_suffix, ".GBC") ? ".GX" : ".GBX"; return gameboy_convert_data (rominfo, gbc2gbx, new_suffix); } int gameboy_n (st_rominfo_t *rominfo, const char *name) { char buf[GB_NAME_LEN], dest_name[FILENAME_MAX]; memset (buf, 0, GB_NAME_LEN); strncpy (buf, name, GB_NAME_LEN); strcpy (dest_name, ucon64.rom); ucon64_file_handler (dest_name, NULL, 0); fcopy (ucon64.rom, 0, ucon64.file_size, dest_name, "wb"); ucon64_fwrite (buf, rominfo->buheader_len + GAMEBOY_HEADER_START + 0x34, GB_NAME_LEN, dest_name, "r+b"); printf (ucon64_msg[WROTE], dest_name); return 0; } int gameboy_chk (st_rominfo_t *rominfo) { char buf[4], dest_name[FILENAME_MAX]; strcpy (dest_name, ucon64.rom); ucon64_file_handler (dest_name, NULL, 0); fcopy (ucon64.rom, 0, ucon64.file_size, dest_name, "wb"); buf[0] = checksum.header; buf[1] = rominfo->current_internal_crc >> 8; buf[2] = rominfo->current_internal_crc; ucon64_fwrite (buf, rominfo->buheader_len + GAMEBOY_HEADER_START + 0x4d, 3, dest_name, "r+b"); dumper (stdout, buf, 3, GAMEBOY_HEADER_START + rominfo->buheader_len + 0x4d, DUMPER_HEX); printf (ucon64_msg[WROTE], dest_name); return 0; } int gameboy_mgd (st_rominfo_t *rominfo) // TODO: convert the ROM data { char src_name[FILENAME_MAX], dest_name[FILENAME_MAX]; int size = ucon64.file_size - rominfo->buheader_len; strcpy (src_name, ucon64.rom); mgd_make_name (ucon64.rom, UCON64_GB, size, dest_name); ucon64_file_handler (dest_name, src_name, OF_FORCE_BASENAME); fcopy (src_name, rominfo->buheader_len, size, dest_name, "wb"); printf (ucon64_msg[WROTE], dest_name); remove_temp_file (); mgd_write_index_file ((char *) basename2 (dest_name), 1); return 0; } int gameboy_ssc (st_rominfo_t *rominfo) // TODO: convert the ROM data { st_unknown_header_t header; char src_name[FILENAME_MAX], dest_name[FILENAME_MAX]; const char *p = NULL; int size = ucon64.file_size - rominfo->buheader_len; memset (&header, 0, UNKNOWN_HEADER_LEN); header.size_low = size / 8192; header.size_high = size / 8192 >> 8; header.id1 = 0xaa; header.id2 = 0xbb; #if 0 // TODO: find out correct value. 2 is used for Magic Super Griffin header.type = 2; #endif strcpy (src_name, ucon64.rom); p = basename2 (ucon64.rom); // TODO: find out if this is correct (giving the file name a prefix) if ((p[0] == 'G' || p[0] == 'g') && (p[1] == 'B' || p[1] == 'b')) strcpy (dest_name, p); else sprintf (dest_name, "gb%s", p); set_suffix (dest_name, ".gb"); ucon64_file_handler (dest_name, src_name, 0); ucon64_fwrite (&header, 0, UNKNOWN_HEADER_LEN, dest_name, "wb"); fcopy (src_name, rominfo->buheader_len, size, dest_name, "ab"); printf (ucon64_msg[WROTE], dest_name); remove_temp_file (); return 0; } int gameboy_init (st_rominfo_t *rominfo) { int result = -1, value, x; char buf[MAXBUFSIZE]; static const char *gameboy_romtype1[0x20] = { "ROM only", "ROM + MBC1", "ROM + MBC1 + RAM", "ROM + MBC1 + RAM + Battery", NULL, "ROM + MBC2", "ROM + MBC2 + Battery", NULL, "ROM + RAM", // correct? - dbjh "ROM + RAM + Battery", // correct? - dbjh NULL, "ROM + MMM01", "ROM + MMM01 + SRAM", "ROM + MMM01 + SRAM + Battery", NULL, "ROM + MBC3 + Battery + Timer", "ROM + MBC3 + RAM + Battery + Timer", "ROM + MBC3", "ROM + MBC3 + RAM", "ROM + MBC3 + RAM + Battery", NULL, NULL, NULL, NULL, NULL, "ROM + MBC5", "ROM + MBC5 + RAM", "ROM + MBC5 + RAM + Battery", "ROM + MBC5 + Rumble", "ROM + MBC5 + SRAM + Rumble", "ROM + MBC5 + SRAM + Battery + Rumble", "Nintendo Pocket Camera" }, *gameboy_romtype2[3] = { "Rocket Games", NULL, "Rocket Games 2-in-1" }, *gameboy_romtype3[3] = { "Bandai TAMA5", "Hudson HuC-3", "Hudson HuC-1" }, *str; rominfo->buheader_len = UCON64_ISSET (ucon64.buheader_len) ? ucon64.buheader_len : 0; ucon64_fread (&gameboy_header, rominfo->buheader_len + GAMEBOY_HEADER_START, GAMEBOY_HEADER_LEN, ucon64.rom); if (gameboy_header.opcode1 == 0x00 && gameboy_header.opcode2 == 0xc3) result = 0; else { rominfo->buheader_len = UCON64_ISSET (ucon64.buheader_len) ? ucon64.buheader_len : (int) SSC_HEADER_LEN; ucon64_fread (&gameboy_header, rominfo->buheader_len + GAMEBOY_HEADER_START, GAMEBOY_HEADER_LEN, ucon64.rom); if (gameboy_header.opcode1 == 0x00 && gameboy_header.opcode2 == 0xc3) result = 0; else result = -1; } if (ucon64.console == UCON64_GB) result = 0; rominfo->header_start = GAMEBOY_HEADER_START; rominfo->header_len = GAMEBOY_HEADER_LEN; rominfo->header = &gameboy_header; // internal ROM name strncpy (rominfo->name, (const char *) gameboy_header.name, GB_NAME_LEN); rominfo->name[GB_NAME_LEN] = 0; // terminate string // ROM maker if (gameboy_header.maker == 0x33) { int ih = gameboy_header.maker_high <= '9' ? gameboy_header.maker_high - '0' : gameboy_header.maker_high - 'A' + 10, il = gameboy_header.maker_low <= '9' ? gameboy_header.maker_low - '0' : gameboy_header.maker_low - 'A' + 10; x = ih * 36 + il; } else x = (gameboy_header.maker >> 4) * 36 + (gameboy_header.maker & 0x0f); /* I added the first if statement, because I didn't want to expand nintendo_maker by a large amount for only one publisher and because index 0 is used when the publisher code is unknown (so it shouldn't be set to "Rocket Games"). - dbjh */ if (x == 33 * 36 + 33 || x == 0) // publisher code XX/00 x = 2; // Rocket Games else if (x < 0 || x >= NINTENDO_MAKER_LEN) x = 0; rominfo->maker = NULL_TO_UNKNOWN_S (nintendo_maker[x]); // ROM country rominfo->country = gameboy_header.country == 0 ? "Japan" : "U.S.A. & Europe"; // misc stuff // Don't move division by 4 to shift parameter (gameboy_header.rom_size can be < 2) sprintf (buf, "Internal size: %.4f Mb\n", (1 << gameboy_header.rom_size) / 4.0f); strcat (rominfo->misc, buf); if (gameboy_header.rom_type <= 0x1f) str = NULL_TO_UNKNOWN_S (gameboy_romtype1[gameboy_header.rom_type]); else if (gameboy_header.rom_type >= 0x97 && gameboy_header.rom_type <= 0x99) str = gameboy_romtype2[gameboy_header.rom_type - 0x97]; else if (gameboy_header.rom_type >= 0xfd) str = gameboy_romtype3[gameboy_header.rom_type - 0xfd]; else str = "Unknown"; sprintf (buf, "ROM type: %s\n", str); strcat (rominfo->misc, buf); if (!gameboy_header.sram_size) sprintf (buf, "Save RAM: No\n"); else { value = (gameboy_header.sram_size & 7) << 1; // 0/1/2/4/5 if (value) value = 1 << (value - 1); sprintf (buf, "Save RAM: Yes, %d kBytes\n", value); } strcat (rominfo->misc, buf); sprintf (buf, "Version: 1.%d\n", gameboy_header.version); strcat (rominfo->misc, buf); sprintf (buf, "Game Boy type: %s\n", (gameboy_header.gb_type == 0x80) ? "Color" : // (OFFSET (gameboy_header, 0x46) == 0x03) ? "Super" : "Standard (4 colors)"); strcat (rominfo->misc, buf); value = gameboy_header.start_high << 8; value += gameboy_header.start_low; sprintf (buf, "Start address: 0x%04x\n", value); strcat (rominfo->misc, buf); strcat (rominfo->misc, "Logo data: "); if (memcmp (gameboy_header.logo, (gameboy_header.rom_type >= 0x97 && gameboy_header.rom_type <= 0x99) ? rocket_logodata : gb_logodata, GB_LOGODATA_LEN) == 0) { #ifdef USE_ANSI_COLOR if (ucon64.ansi_color) strcat (rominfo->misc, "\x1b[01;32mOk\x1b[0m"); else #endif strcat (rominfo->misc, "Ok"); } else { #ifdef USE_ANSI_COLOR if (ucon64.ansi_color) strcat (rominfo->misc, "\x1b[01;31mBad\x1b[0m"); else #endif strcat (rominfo->misc, "Bad"); } if (!UCON64_ISSET (ucon64.do_not_calc_crc) && result == 0) { rominfo->has_internal_crc = 1; rominfo->internal_crc_len = 2; checksum = gameboy_chksum (rominfo); rominfo->current_internal_crc = checksum.value; rominfo->internal_crc = (gameboy_header.checksum_high << 8) + gameboy_header.checksum_low; x = gameboy_header.header_checksum; sprintf (rominfo->internal_crc2, "Header checksum: %s, 0x%02x (calculated) %c= 0x%02x (internal)", #ifdef USE_ANSI_COLOR ucon64.ansi_color ? ((checksum.header == x) ? "\x1b[01;32mOk\x1b[0m" : "\x1b[01;31mBad\x1b[0m") : ((checksum.header == x) ? "Ok" : "Bad"), #else (checksum.header == x) ? "Ok" : "Bad", #endif checksum.header, (checksum.header == x) ? '=' : '!', x); } rominfo->console_usage = gameboy_usage[0].help; rominfo->copier_usage = (!rominfo->buheader_len ? mgd_usage[0].help : ssc_usage[0].help); return result; } st_gameboy_chksum_t gameboy_chksum (st_rominfo_t *rominfo) { st_gameboy_chksum_t sum = { 0, 0 }; unsigned char *rom_buffer; int size = ucon64.file_size - rominfo->buheader_len, i; if (!(rom_buffer = (unsigned char *) malloc (size))) { fprintf (stderr, ucon64_msg[ROM_BUFFER_ERROR], size); return sum; } ucon64_fread (rom_buffer, rominfo->buheader_len, size, ucon64.rom); for (i = GAMEBOY_HEADER_START + 0x34; i < GAMEBOY_HEADER_START + 0x4d; i++) sum.header += ~rom_buffer[i]; for (i = 0; i < size; i++) sum.value += rom_buffer[i]; sum.value -= (rom_buffer[GAMEBOY_HEADER_START + 0x4d] - sum.header) + rom_buffer[GAMEBOY_HEADER_START + 0x4e] + rom_buffer[GAMEBOY_HEADER_START + 0x4f]; free (rom_buffer); return sum; }