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- /*
- gb.c - Game Boy support for uCON64
- Copyright (c) 1999 - 2001 NoisyB <noisyb@gmx.net>
- 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 <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <ctype.h>
- #ifdef HAVE_UNISTD_H
- #include <unistd.h>
- #endif
- #include <string.h>
- #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;
- }
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