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Add support for the four‐character game ID.

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This commit is contained in:
Anthony J. Bentley
2011-12-29 20:22:06 -07:00
parent 07802fffc9
commit fd724d10e4
2 changed files with 43 additions and 4 deletions
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38
src/fix/main.c
View File

@@ -24,9 +24,10 @@
static void
usage(void)
{
printf("usage: rgbfix [-Ccjsv] [-k licensee_str] [-l licensee_id] "
"[-m mbc_type]\n" " [-n rom_version] [-p pad_value] "
"[-r ram_size] [-t title_str] file.gb\n");
printf("usage: rgbfix [-Ccjsv] [-i game_id] [-k licensee_str] "
"[-l licensee_id]\n" " [-m mbc_type] [-n rom_version] "
"[-p pad_value] [-r ram_size]\n"
" [-t title_str] file.gb\n");
}
int
@@ -56,6 +57,7 @@ main(int argc, char *argv[])
/* all flags default to false unless options specify otherwise */
bool validate = false;
bool settitle = false;
bool setid = false;
bool colorcompatible = false;
bool coloronly = false;
bool nonjapan = false;
@@ -68,6 +70,7 @@ main(int argc, char *argv[])
bool setversion = false;
char *title = NULL; /* game title in ASCII */
char *id = NULL; /* game ID in ASCII */
char *newlicensee = NULL; /* new licensee ID, two ASCII characters */
int licensee = -1; /* old licensee ID */
@@ -76,7 +79,7 @@ main(int argc, char *argv[])
int version = -1; /* mask ROM version number */
int padvalue = -1; /* to pad the rom with if it changes size */
while ((ch = getopt(argc, argv, "Ccjk:l:m:n:p:sr:t:v")) != -1) {
while ((ch = getopt(argc, argv, "Cci:jk:l:m:n:p:sr:t:v")) != -1) {
switch (ch) {
case 'C':
coloronly = true;
@@ -84,6 +87,17 @@ main(int argc, char *argv[])
case 'c':
colorcompatible = true;
break;
case 'i':
setid = true;
if (strlen(optarg) != 4) {
fprintf(stderr, "Game ID %s must be exactly 4 "
"characters\n", optarg);
exit(1);
}
id = optarg;
break;
case 'j':
nonjapan = true;
break;
@@ -251,6 +265,11 @@ main(int argc, char *argv[])
* may conflict.
*/
/*
* See also: Game ID at 0x13F–0x142. These four ASCII
* characters may conflict with the title.
*/
fseek(rom, 0x134, SEEK_SET);
fwrite(title, 1, strlen(title) + 1, rom);
@@ -258,6 +277,17 @@ main(int argc, char *argv[])
fputc(0, rom);
}
if (setid) {
/*
* Offset 0x13F–0x142: Game ID
* This is a four-character game ID in ASCII (no high-bit
* characters).
*/
fseek(rom,0x13F,SEEK_SET);
fwrite(id, 1, 4, rom);
}
if (colorcompatible) {
/*
* Offset 0x143: Game Boy Color Flag

9
src/fix/rgbfix.1
View File

@@ -7,6 +7,7 @@
.Sh SYNOPSIS
.Nm rgbfix
.Op Fl Ccjsv
.Op Fl i Ar game_id
.Op Fl k Ar licensee_str
.Op Fl l Ar licensee_id
.Op Fl m Ar mbc_type
@@ -38,6 +39,12 @@ If both this and the
flag are set,
.Fl C
takes precedence.
.It Fl i Ar game_id
Set the game ID string
.Pq Ad 0x13F No Ns \(en Ns Ad 0x142
to a given string of exactly 4 characters.
If both this and the title are set, the game ID will overwrite the
overlapping portion of the title.
.It Fl j
Set the non-Japanese region flag:
.Ad 0x14A
@@ -82,6 +89,8 @@ to a given string, truncated to at most 16 characters.
It is recommended to use 15 characters instead, to avoid clashing with the CGB
flag
.Pq Fl c No or Fl C .
If both this and the game ID are set, the game ID will overwrite the
overlapping portion of the title.
.It Fl v
Validate the header and fix checksums: the Nintendo character area
.Pq Ad 0x104 No Ns \(en Ns Ad 0x133 ,