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MD.ino: Move some globals to getCartInfo_MD locals.

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Also, bypass sdBuffer when it was the directory copied to another buffer.
Also, factorise yet another pair of loops copying rom name.
This frees 59 bytes of global ram space.
This commit is contained in:
Vincent Pelletier 2022-10-24 06:51:06 +00:00
parent 3c3b399d6a
commit 10061beaf5
1 changed files with 29 additions and 33 deletions
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62
Cart_Reader/MD.ino
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@ -103,10 +103,6 @@ static unsigned long cartSizeLockon;
static unsigned long cartSizeSonic2 = 262144;
static word chksumLockon;
static word chksumSonic2 = 0x0635;
static char romNameLockon[12];
static char id[15];
static char idLockon[15];
static char labelLockon[17];
/******************************************
Configuration
@ -671,6 +667,23 @@ void dataIn_MD() {
/******************************************
MEGA DRIVE functions
*****************************************/
byte copyToRomName_MD(char *output, const byte *input, byte length) {
byte myLength = 0;
for (byte i = 0; i < 48; i++) {
if (
(
(input[i] >= '0' && input[i] <= '9') ||
(input[i] >= 'A' && input[i] <= 'z')
) && myLength < length
) {
output[myLength++] = input[i];
}
}
return myLength;
}
void getCartInfo_MD() {
// Set control
dataIn_MD();
@ -709,6 +722,7 @@ void getCartInfo_MD() {
// Sonic & Knuckles Check
SnKmode = 0;
if (chksum == 0xDFB3) {
char id[15];
// Get ID
for (byte c = 0; c < 14; c += 2) {
@ -718,15 +732,13 @@ void getCartInfo_MD() {
byte hiByte = myWord >> 8;
// write to buffer
sdBuffer[c] = hiByte;
sdBuffer[c + 1] = loByte;
}
for (int i = 0; i < 14; i++) {
id[i] = char(sdBuffer[i]);
id[c] = hiByte;
id[c + 1] = loByte;
}
//Sonic & Knuckles ID:GM MK-1563 -00
if (!strcmp("GM MK-1563 -00", id)) {
char labelLockon[17];
// Get labelLockon
for (byte c = 0; c < 16; c += 2) {
@ -736,15 +748,13 @@ void getCartInfo_MD() {
byte hiByte = myWord >> 8;
// write to buffer
sdBuffer[c] = hiByte;
sdBuffer[c + 1] = loByte;
}
for (int i = 0; i < 16; i++) {
labelLockon[i] = char(sdBuffer[i]);
labelLockon[c] = hiByte;
labelLockon[c + 1] = loByte;
}
// check Lock-on game presence
if (!(strcmp("SEGA MEGA DRIVE ", labelLockon) & strcmp("SEGA GENESIS ", labelLockon))) {
char idLockon[15];
// Lock-on cart checksum
chksumLockon = readWord_MD(0x1000C7);
@ -759,11 +769,8 @@ void getCartInfo_MD() {
byte hiByte = myWord >> 8;
// write to buffer
sdBuffer[c] = hiByte;
sdBuffer[c + 1] = loByte;
}
for (int i = 0; i < 14; i++) {
idLockon[i] = char(sdBuffer[i]);
idLockon[c] = hiByte;
idLockon[c + 1] = loByte;
}
if (!(strncmp("GM 00001009-0", idLockon, 13) & strncmp("GM 00004049-0", idLockon, 13))) {
@ -968,16 +975,11 @@ void getCartInfo_MD() {
sdBuffer[c] = hiByte;
sdBuffer[c + 1] = loByte;
}
byte myLength = 0;
for (unsigned int i = 0; i < 48; i++) {
if (((char(sdBuffer[i]) >= 48 && char(sdBuffer[i]) <= 57) || (char(sdBuffer[i]) >= 65 && char(sdBuffer[i]) <= 122)) && myLength < 15) {
romName[myLength] = char(sdBuffer[i]);
myLength++;
}
}
romName[copyToRomName_MD(romName, sdBuffer, sizeof(romName) - 1)] = 0;
//Get Lock-on cart name
if (SnKmode >= 2) {
char romNameLockon[12];
//Change romName
strcpy(romName, "SnK_");
@ -992,13 +994,7 @@ void getCartInfo_MD() {
sdBuffer[c] = hiByte;
sdBuffer[c + 1] = loByte;
}
byte myLength = 0;
for (unsigned int i = 0; i < 48; i++) {
if (((char(sdBuffer[i]) >= 48 && char(sdBuffer[i]) <= 57) || (char(sdBuffer[i]) >= 65 && char(sdBuffer[i]) <= 122)) && myLength < 11) {
romNameLockon[myLength] = char(sdBuffer[i]);
myLength++;
}
}
romNameLockon[copyToRomName_MD(romNameLockon, sdBuffer, sizeof(romNameLockon) - 1)] = 0;
switch (SnKmode) {
case 2: strcat(romName, "SONIC1"); break;