Update NES.ino

fix mapper 80
sanni · Aug 28, 2024 · 5cbbfa6 · 5cbbfa6
1 parent 125e9b4
commit 5cbbfa6
Showing 1 changed file with 10 additions and 12 deletions.
diff --git a/Cart_Reader/NES.ino b/Cart_Reader/NES.ino
@@ -101,7 +101,7 @@ static const struct mapper_NES PROGMEM mapsize[] = {
   { 78, 3, 3, 5, 5, 0, 0 },  // irem 74hc161/32
   { 79, 1, 2, 2, 3, 0, 0 },  // NINA-03/06 by AVE [UNLICENSED]
   { 80, 3, 3, 5, 6, 0, 1 },  // taito x1-005                                       [prgram r/w]
-  { 82, 3, 3, 5, 6, 0, 1 },  // taito x1-017                                       [prgram r/w]
+  { 82, 3, 5, 5, 6, 0, 1 },  // taito x1-017                                       [prgram r/w]
   // 84 - bad mapper, not used
   { 85, 3, 5, 0, 5, 0, 1 },  // vrc7                                               [sram r/w]
   { 86, 3, 3, 4, 4, 0, 0 },  // jaleco jf-13 (moero pro yakyuu)
@@ -2286,10 +2286,9 @@ void readPRG(bool readrom) {
       case 80:   // 128K
       case 207:  // 256K [CART SOMETIMES NEEDS POWERCYCLE]
         banks = int_pow(2, prgsize) * 2;
-        for (size_t i = 0; i < banks; i += 2) {
+        for (size_t i = 0; i < banks; i++) {
           write_prg_byte(0x7EFA, i);      // PRG Bank 0 ($8000-$9FFF)
-          write_prg_byte(0x7EFC, i + 1);  // PRG Bank 1 ($A000-$BFFF)
-          dumpBankPRG(0x0, 0x4000, base);
+          dumpBankPRG(0x0, 0x2000, base);
         }
         break;
 
@@ -3296,13 +3295,12 @@ void readCHR(bool readrom) {
         case 80:   // 128K/256K
         case 82:   // 128K/256K
         case 207:  // 128K [CART SOMETIMES NEEDS POWERCYCLE]
-          banks = int_pow(2, chrsize) * 4;
-          for (size_t i = 0; i < banks; i += 4) {
-            write_prg_byte(0x7EF2, i);      // CHR Bank 2 [REGISTERS 0x7EF0/0x7EF1 WON'T WORK]
-            write_prg_byte(0x7EF3, i + 1);  // CHR Bank 3
-            write_prg_byte(0x7EF4, i + 2);  // CHR Bank 4
-            write_prg_byte(0x7EF5, i + 3);  // CHR Bank 5
-            dumpBankCHR(0x0, 0x2000);
+          banks = int_pow(2, chrsize) * 2;
+          write_prg_byte(0x7EF6, 0x00);     // CHR mode [2x 2KiB banks at $0000-$0FFF]
+          for (size_t i = 0; i < banks; i += 2) {
+            write_prg_byte(0x7EF0, i << 1);
+            write_prg_byte(0x7EF1, (i + 1) << 1);
+            dumpBankCHR(0x0, 0x1000);
           }
           break;
 
@@ -4651,4 +4649,4 @@ void A29040B_writeFLASH() {
 #endif
 //******************************************
 // End of File
-//******************************************
+//******************************************