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Merge pull request #52 from jiyunomegami/master

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MD SRAM fixes
This commit is contained in:
sanni 2020-07-13 16:15:33 +02:00 committed by GitHub
commit 4cc3092bbd
2 changed files with 180 additions and 33 deletions
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5
Cart_Reader/Cart_Reader.ino
View File

@ -825,6 +825,11 @@ void print_Msg_PaddedHexByte(byte message) {
print_Msg(message, HEX);
}
void print_Msg_PaddedHex16(word message) {
print_Msg_PaddedHexByte((message >> 8) & 0xFF);
print_Msg_PaddedHexByte((message >> 0) & 0xFF);
}
void print_Msg_PaddedHex32(unsigned long message) {
print_Msg_PaddedHexByte((message >> 24) & 0xFF);
print_Msg_PaddedHexByte((message >> 16) & 0xFF);

208
Cart_Reader/MD.ino
View File

@ -85,6 +85,85 @@ unsigned long bramSize = 0;
// REALTEC MAPPER
boolean realtec = 0;
#define DEFAULT_VALUE_segaSram16bit 0
int segaSram16bit = DEFAULT_VALUE_segaSram16bit;
/******************************************
Configuration
*****************************************/
void mdLoadConf() {
if (myFile.open("md.txt", O_READ)) {
char line[64];
int n;
int i;
while ((n = myFile.fgets(line, sizeof(line)-1)) > 0) {
// preprocess
for (i = 0; i < n; i++) {
if (line[i] == ';') {
// comments
line[i] = '\0';
n = i;
break;
} else if (line[i] == '\n' || line[i] == '\r') {
// EOL
line[n] = '\0';
n = i;
break;
}
}
//print_Msg(F("read line: "));
//println_Msg(line);
if (line[0] == '[') {
char *name;
char *value;
i = 1;
name = line + i;
for (; i < sizeof(line); i++) {
if (line[i] == ']') {
line[i] = '\0';
i++;
break;
}
}
if (line[i] != '\0') {
for (; i < sizeof(line); i++) {
if (line[i] != ' ') {
value = line + i;
i++;
break;
}
}
for (; i < sizeof(line) && line[i] != '\0'; i++) {
if (line[i] == ' ') {
line[i] = '\0';
break;
}
}
}
//print_Msg(F("read name: "));
//println_Msg(name);
//print_Msg(F("value: "));
//println_Msg(value);
if (!strcmp("segaSram16bit", name)) {
// Retrode compatible setting
// [segaSram16bit] 1 ; 0=no, 1=yes, 2=y+large
// 0: Output each byte once. Not supported by most emulators.
// 1: Duplicate each byte. Usable by Kega Fusion.
// 2: Duplicate each byte. Pad with 0xFF so that the file size is 64KB.
segaSram16bit = atoi(value);
if (segaSram16bit != 0 && segaSram16bit != 1 && segaSram16bit != 2) {
segaSram16bit = DEFAULT_VALUE_segaSram16bit;
}
print_Msg(F("segaSram16bit: "));
println_Msg(segaSram16bit);
}
}
}
myFile.close();
}
}
/******************************************
Menu
*****************************************/
@ -221,7 +300,7 @@ void mdCartMenu() {
case 1:
display_Clear();
// Does cartridge have SRAM
if ((saveType == 1) || (saveType == 2) || (saveType == 3) || (saveType == 5)) {
if ((saveType == 1) || (saveType == 2) || (saveType == 3)) {
// Change working dir to root
sd.chdir("/");
println_Msg(F("Reading Sram..."));
@ -238,7 +317,7 @@ void mdCartMenu() {
case 2:
display_Clear();
// Does cartridge have SRAM
if ((saveType == 1) || (saveType == 2) || (saveType == 3) || (saveType == 5)) {
if ((saveType == 1) || (saveType == 2) || (saveType == 3)) {
// Change working dir to root
sd.chdir("/");
// Launch file browser
@ -358,6 +437,8 @@ void segaCDMenu() {
Setup
*****************************************/
void setup_MD() {
mdLoadConf();
// Set Address Pins to Output
//A0-A7
DDRF = 0xFF;
@ -597,7 +678,10 @@ void getCartInfo_MD() {
// Get sram start and end
sramBase = ((long(readWord_MD(0xDA)) << 16) | readWord_MD(0xDB));
sramEnd = ((long(readWord_MD(0xDC)) << 16) | readWord_MD(0xDD));
if (sramBase == 0x20000020 && sramEnd == 0x00010020) { // Fix for Psy-o-blade
sramBase = 0x200001;
sramEnd = 0x203fff;
}
// Check alignment of sram
if ((sramBase == 0x200001) || (sramBase == 0x300001)) { // ADDED 0x300001 FOR HARDBALL '95 (U)
// low byte
@ -605,10 +689,6 @@ void getCartInfo_MD() {
sramSize = (sramEnd - sramBase + 2) / 2;
// Right shift sram base address so [A21] is set to high 0x200000 = 0b001[0]00000000000000000000
sramBase = sramBase >> 1;
if (chksum == 0x5D33 && sramEnd == 0x203FFF) { // Dragon Slayer Eiyuu Densetsu
// the high byte read as zero
saveType = 5; // BOTH
}
}
else if (sramBase == 0x200000) {
// high byte
@ -617,8 +697,18 @@ void getCartInfo_MD() {
// Right shift sram base address so [A21] is set to high 0x200000 = 0b001[0]00000000000000000000
sramBase = sramBase / 2;
}
else
else {
print_Msg(("sramType: "));
print_Msg_PaddedHex16(sramType);
println_Msg(F(""));
print_Msg(("sramBase: "));
print_Msg_PaddedHex32(sramBase);
println_Msg(F(""));
print_Msg(("sramEnd: "));
print_Msg_PaddedHex32(sramEnd);
println_Msg(F(""));
print_Error(F("Unknown Sram Base"), true);
}
}
else if (sramType == 0xE020) { // SRAM BOTH BYTES
// Get sram start and end
@ -635,8 +725,18 @@ void getCartInfo_MD() {
sramSize = sramEnd - sramBase + 1;
sramBase = sramBase >> 1;
}
else
else {
print_Msg(("sramType: "));
print_Msg_PaddedHex16(sramType);
println_Msg(F(""));
print_Msg(("sramBase: "));
print_Msg_PaddedHex32(sramBase);
println_Msg(F(""));
print_Msg(("sramEnd: "));
print_Msg_PaddedHex32(sramEnd);
println_Msg(F(""));
print_Error(F("Unknown Sram Base"), true);
}
}
}
else {
@ -725,10 +825,11 @@ void getCartInfo_MD() {
println_Msg(F(" "));
print_Msg(F("Name: "));
println_Msg(romName);
print_Msg(F("bramCheck: "));
print_Msg_PaddedHexByte(bramCheck >> 8);
print_Msg_PaddedHexByte(bramCheck & 0x00ff);
println_Msg(F(""));
if (bramCheck != 0x00FF) {
print_Msg(F("bramCheck: "));
print_Msg_PaddedHex16(bramCheck);
println_Msg(F(""));
}
if (bramSize > 0) {
print_Msg(F("bramSize(KB): "));
println_Msg(bramSize >> 10);
@ -966,21 +1067,31 @@ void writeSram_MD() {
// Write to the lower byte
if (saveType == 1) {
for (unsigned long currByte = sramBase; currByte < sramBase + sramSize; currByte++) {
writeWord_MD(currByte, (myFile.read() & 0xFF));
if (segaSram16bit > 0) {
// skip high byte
myFile.read();
}
word data = myFile.read() & 0xFF;
writeWord_MD(currByte, data);
}
}
// Write to the upper byte
else if (saveType == 2) {
for (unsigned long currByte = sramBase; currByte < sramBase + sramSize; currByte++) {
writeWord_MD(currByte, ((myFile.read() << 8 ) & 0xFF));
word data = (myFile.read() << 8) & 0xFF00;
writeWord_MD(currByte, data);
if (segaSram16bit > 0) {
// skip low byte
myFile.read();
}
}
}
// Write to both bytes
else if (saveType == 5) {
else if (saveType == 3) {
for (unsigned long currByte = sramBase; currByte < sramBase + sramSize; currByte++) {
word w0 = (myFile.read() & 0xFF); // skip
word w1 = (myFile.read() & 0xFF);
writeWord_MD(currByte, w1);
word data = (myFile.read() << 8) & 0xFF00;
data |= (myFile.read() & 0xFF);
writeWord_MD(currByte, data);
}
}
else
@ -1026,26 +1137,43 @@ void readSram_MD() {
if (saveType == 2) {
// Only use the upper byte
sdBuffer[currWord] = (( myWord >> 8 ) & 0xFF);
if (segaSram16bit > 0) {
sdBuffer[(currWord * 2) + 0] = (( myWord >> 8 ) & 0xFF);
sdBuffer[(currWord * 2) + 1] = (( myWord >> 8 ) & 0xFF);
} else {
sdBuffer[currWord] = (( myWord >> 8 ) & 0xFF);
}
}
else if (saveType == 1) {
// Only use the lower byte
sdBuffer[currWord] = (myWord & 0xFF);
if (segaSram16bit > 0) {
sdBuffer[(currWord * 2) + 0] = (myWord & 0xFF);
sdBuffer[(currWord * 2) + 1] = (myWord & 0xFF);
} else {
sdBuffer[currWord] = (myWord & 0xFF);
}
}
else if (saveType == 3) { // BOTH
sdBuffer[currWord * 2] = (( myWord >> 8 ) & 0xFF);
sdBuffer[(currWord * 2) + 1] = (myWord & 0xFF);
}
else if (saveType == 5) { // duplicate the lower byte
sdBuffer[(currWord * 2) + 0] = (myWord & 0xFF);
sdBuffer[(currWord * 2) + 1] = (myWord & 0xFF);
}
}
if (saveType == 3 || saveType == 5)
if (saveType == 3 || segaSram16bit > 0)
myFile.write(sdBuffer, 512);
else
myFile.write(sdBuffer, 256);
}
if (segaSram16bit == 2) {
// pad to 64KB
for (int i = 0; i < 512; i++) {
sdBuffer[i] = 0xFF;
}
unsigned long padsize = (1UL << 16) - (sramSize << 1);
unsigned long padblockcount = padsize >> 9; // number of 512 byte blocks
for (int i = 0; i < padblockcount; i++) {
myFile.write(sdBuffer, 512);
}
}
// Close the file:
myFile.close();
print_Msg(F("Saved to "));
@ -1060,22 +1188,36 @@ unsigned long verifySram_MD() {
// Open file on sd card
if (myFile.open(filePath, O_READ)) {
for (unsigned long currBuffer = sramBase; currBuffer < sramBase + sramSize; currBuffer += 512) {
for (int currWord = 0; currWord < 512; currWord++) {
for (unsigned long currBuffer = sramBase; currBuffer < sramBase + sramSize; currBuffer += 256) {
for (int currWord = 0; currWord < 256; currWord++) {
word myWord = readWord_MD(currBuffer + currWord);
if (saveType == 2) {
// Only use the upper byte
sdBuffer[currWord] = (( myWord >> 8 ) & 0xFF);
sdBuffer[currWord * 2] = (( myWord >> 8 ) & 0xFF);
}
else if (saveType == 1) {
// Only use the lower byte
sdBuffer[currWord] = (myWord & 0xFF);
sdBuffer[currWord * 2] = (myWord & 0xFF);
}
else if (saveType == 3) { // BOTH
sdBuffer[(currWord * 2) + 0] = (( myWord >> 8 ) & 0xFF);
sdBuffer[(currWord * 2) + 1] = (myWord & 0xFF);
}
}
int step = saveType == 3 ? 1 : 2;
// Check sdBuffer content against file on sd card
for (int i = 0; i < 512; i++) {
if (myFile.read() != sdBuffer[i]) {
for (int i = 0; i < 512; i += step) {
if (saveType == 1 && segaSram16bit > 0) {
// skip high byte
myFile.read();
}
byte b = myFile.read();
if (saveType == 2 && segaSram16bit > 0) {
// skip low byte
myFile.read();
}
if (b != sdBuffer[i]) {
writeErrors++;
}
}