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GBS.ino: Move gbSmartGames from globals to a local.

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Saves 120 bytes of global ram space.
Also, factorise code reading a single entry. This saves about 60 bytes of
code space.
This commit is contained in:
Vincent Pelletier 2022-10-24 03:22:04 +00:00
parent ae2e90a6cd
commit b3eb3dd928
1 changed files with 34 additions and 55 deletions
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89
Cart_Reader/GBS.ino
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@ -26,14 +26,14 @@ static const char gbSmartGameMenuItem4[] PROGMEM = "Switch Game";
//static const char gbSmartGameMenuItem5[] PROGMEM = "Reset"; (stored in common strings array)
static const char* const menuOptionsGBSmartGame[] PROGMEM = { gbSmartGameMenuItem1, gbSmartGameMenuItem2, gbSmartGameMenuItem3, gbSmartGameMenuItem4, string_reset2 };
typedef struct
struct GBSmartGameInfo
{
uint8_t start_bank;
uint8_t rom_type;
uint8_t rom_size;
uint8_t sram_size;
char title[16];
} GBSmartGameInfo;
};
uint32_t gbSmartSize = 32 * 131072;
uint16_t gbSmartBanks = 256;
@ -46,19 +46,9 @@ uint8_t gbSmartRomSizeGB = 0x07;
uint8_t gbSmartSramSizeGB = 0x04;
uint8_t gbSmartFlashSizeGB = 0x06;
GBSmartGameInfo gbSmartGames[GB_SMART_GAMES_PER_PAGE];
byte signature[48];
uint16_t gameMenuStartBank;
#ifdef enable_SFM
extern boolean hasMenu;
extern byte numGames;
#else
boolean hasMenu;
byte numGames;
#endif
// Compare checksum
boolean compare_checksum_GBS() {
println_Msg(F("Calculating Checksum"));
@ -150,8 +140,6 @@ void setup_GBSmart() {
signature[i] = readByte_GBS(0x0104 + i);
gameMenuStartBank = 0x02;
hasMenu = true;
numGames = 0;
display_Clear();
display_Update();
@ -246,12 +234,15 @@ void gbSmartGameOptions() {
}
void gbSmartGameMenu() {
boolean hasMenu;
byte numGames;
struct GBSmartGameInfo gbSmartGames[GB_SMART_GAMES_PER_PAGE];
uint8_t gameSubMenu = 0;
gb_smart_load_more_games:
if (gameMenuStartBank > 0xfe)
gameMenuStartBank = 0x02;
gbSmartGetGames();
gbSmartGetGames(gbSmartGames, &hasMenu, &numGames);
if (hasMenu) {
char menuOptionsGBSmartGames[7][20];
@ -339,29 +330,44 @@ void gbSmartFlashMenu() {
wait();
}
void gbSmartGetGames() {
void gbSmartGetOneGame(struct GBSmartGameInfo *gbSmartGames, byte bank, word base) {
uint8_t myByte, myLength = 0;
word title_address = base + 0x0134;
for (uint8_t j = 0; j < 15; j++) {
myByte = readByte_GBS(title_address++);
if (((myByte >= '0' && myByte <= '9') || (myByte >= 'A' && myByte <= 'z')))
gbSmartGames->title[myLength++] = myByte;
}
gbSmartGames->title[myLength] = 0x00;
gbSmartGames->start_bank = bank;
gbSmartGames->rom_type = readByte_GBS(base + 0x0147);
gbSmartGames->rom_size = readByte_GBS(base + 0x0148);
gbSmartGames->sram_size = readByte_GBS(base + 0x0149);
}
void gbSmartGetGames(struct GBSmartGameInfo *gbSmartGames, boolean *hasMenu, byte *numGames) {
static const byte menu_title[] = { 0x47, 0x42, 0x31, 0x36, 0x4d };
// reset remap setting
gbSmartRemapStartBank(0x00, gbSmartRomSizeGB, gbSmartSramSizeGB);
uint16_t i;
uint8_t myByte, myLength;
// check if contain menu
hasMenu = true;
*hasMenu = true;
dataIn();
for (i = 0; i < 5; i++) {
if (readByte_GBS(0x0134 + i) != menu_title[i]) {
hasMenu = false;
*hasMenu = false;
break;
}
}
if (hasMenu) {
for (i = gameMenuStartBank, numGames = 0; i < gbSmartBanks && numGames < GB_SMART_GAMES_PER_PAGE;) {
myLength = 0;
if (*hasMenu) {
for (i = gameMenuStartBank, *numGames = 0; i < gbSmartBanks && *numGames < GB_SMART_GAMES_PER_PAGE;) {
// switch bank
dataOut();
writeByte_GB(0x2100, i);
@ -371,46 +377,19 @@ void gbSmartGetGames() {
for (uint8_t j = 0x00; j < 0x30; j++) {
if (readByte_GBS(0x4104 + j) != signature[j]) {
i += 0x02;
goto gb_smart_get_game_loop_end;
continue;
}
}
for (uint8_t j = 0; j < 15; j++) {
myByte = readByte_GBS(0x4134 + j);
if (((char(myByte) >= 0x30 && char(myByte) <= 0x39) || (char(myByte) >= 0x41 && char(myByte) <= 0x7a)))
gbSmartGames[numGames].title[myLength++] = char(myByte);
}
gbSmartGames[numGames].title[myLength] = 0x00;
gbSmartGames[numGames].start_bank = i;
gbSmartGames[numGames].rom_type = readByte_GBS(0x4147);
gbSmartGames[numGames].rom_size = readByte_GBS(0x4148);
gbSmartGames[numGames].sram_size = readByte_GBS(0x4149);
myByte = (2 << gbSmartGames[numGames].rom_size);
i += myByte;
numGames++;
gb_smart_get_game_loop_end:;
gbSmartGetOneGame(&gbSmartGames[*numGames], i, 0x4000);
i += (2 << gbSmartGames[(*numGames)++].rom_size);
}
gameMenuStartBank = i;
} else {
dataIn();
for (uint8_t j = 0; j < 15; j++) {
myByte = readByte_GBS(0x0134 + j);
gbSmartGetOneGame(&gbSmartGames[0], 0, 0);
if (((char(myByte) >= 0x30 && char(myByte) <= 0x39) || (char(myByte) >= 0x41 && char(myByte) <= 0x7a)))
gbSmartGames[0].title[myLength++] = char(myByte);
}
gbSmartGames[0].title[myLength] = 0x00;
gbSmartGames[0].start_bank = 0x00;
gbSmartGames[0].rom_type = readByte_GBS(0x0147);
gbSmartGames[0].rom_size = readByte_GBS(0x0148);
gbSmartGames[0].sram_size = readByte_GBS(0x0149);
numGames = 1;
*numGames = 1;
gameMenuStartBank = 0xfe;
}
}