Merge pull request #715 from splash5/superacan

Add support for dumping Super A'can game and save

Cart_Reader/Cart_Reader.ino

@@ -146,6 +146,9 @@ char ver[5] = "12.3";
 // WonderSwan
 //#define enable_WS
 
+// Super A'can
+//#define enable_SUPRACAN
+
 //******************************************
 // HW CONFIGS
 //******************************************
@@ -408,6 +411,7 @@ void print_STR(byte string_number, boolean newline) {
 #define mode_ODY2 29
 #define mode_ARC 30
 #define mode_FAIRCHILD 31
+#define mode_SUPRACAN 32
 
 // optimization-safe nop delay
 #define NOP __asm__ __volatile__("nop\n\t")
@@ -1002,8 +1006,9 @@ static const char modeItem16[] PROGMEM = "Magnavox Odyssey 2";
 static const char modeItem17[] PROGMEM = "Arcadia 2001";
 static const char modeItem18[] PROGMEM = "Fairchild Channel F";
 static const char modeItem19[] PROGMEM = "Flashrom Programmer";
-static const char modeItem20[] PROGMEM = "About";
+static const char modeItem20[] PROGMEM = "Super A'can";
-static const char* const modeOptions[] PROGMEM = { modeItem1, modeItem2, modeItem3, modeItem4, modeItem5, modeItem6, modeItem7, modeItem8, modeItem9, modeItem10, modeItem11, modeItem12, modeItem13, modeItem14, modeItem15, modeItem16, modeItem17, modeItem18, modeItem19, modeItem20 };
+static const char modeItem21[] PROGMEM = "About";
+static const char* const modeOptions[] PROGMEM = { modeItem1, modeItem2, modeItem3, modeItem4, modeItem5, modeItem6, modeItem7, modeItem8, modeItem9, modeItem10, modeItem11, modeItem12, modeItem13, modeItem14, modeItem15, modeItem16, modeItem17, modeItem18, modeItem19, modeItem20, modeItem21 };
 
 // All included slots
 void mainMenu() {
@@ -1026,7 +1031,7 @@ void mainMenu() {
       num_answers = 7;
     } else {  // currPage == 3
       option_offset = 14;
-      num_answers = 6;
+      num_answers = 7;
     }
     // Copy menuOptions out of progmem
     convertPgm(modeOptions + option_offset, num_answers);
@@ -1184,7 +1189,13 @@ void mainMenu() {
       break;
 #endif
 
+#ifdef enable_SUPRACAN
     case 19:
+      setup_SuprAcan();
+      break;
+#endif
+
+    case 20:
       aboutScreen();
       break;
 
@@ -1214,10 +1225,11 @@ static const char* const modeOptions[] PROGMEM = { modeItem1, modeItem2, modeIte
 // Add-ons submenu
 static const char addonsItem1[] PROGMEM = "70s Consoles";
 static const char addonsItem2[] PROGMEM = "80s Consoles";
-static const char addonsItem3[] PROGMEM = "Handhelds";
+static const char addonsItem3[] PROGMEM = "90s Consoles";
-static const char addonsItem4[] PROGMEM = "Flashrom Programmer";
+static const char addonsItem4[] PROGMEM = "Handhelds";
+static const char addonsItem5[] PROGMEM = "Flashrom Programmer";
 //static const char addonsItem5[] PROGMEM = "Reset"; (stored in common strings array)
-static const char* const addonsOptions[] PROGMEM = { addonsItem1, addonsItem2, addonsItem3, addonsItem4, string_reset2 };
+static const char* const addonsOptions[] PROGMEM = { addonsItem1, addonsItem2, addonsItem3, addonsItem4, addonsItem5, string_reset2 };
 
 // 70s Consoles submenu
 static const char consoles70Item1[] PROGMEM = "Atari 2600";
@@ -1236,6 +1248,10 @@ static const char consoles80Item3[] PROGMEM = "SMS/GG/MIII/SG-1000";
 //static const char consoles80Item4[] PROGMEM = "Reset"; (stored in common strings array)
 static const char* const consoles80Options[] PROGMEM = { consoles80Item1, consoles80Item2, consoles80Item3, string_reset2 };
 
+// 90s Consoles submenu
+static const char consoles90Item1[] PROGMEM = "Super A'can";
+static const char* const consoles90Options[] PROGMEM = { consoles90Item1, string_reset2 };
+
 // Handhelds submenu
 static const char handheldsItem1[] PROGMEM = "Virtual Boy";
 static const char handheldsItem2[] PROGMEM = "WonderSwan";
@@ -1301,8 +1317,8 @@ void addonMenu() {
   // create menu with title and 5 options to choose from
   unsigned char addonsMenu;
   // Copy menuOptions out of progmem
-  convertPgm(addonsOptions, 5);
+  convertPgm(addonsOptions, 6);
-  addonsMenu = question_box(F("Type"), menuOptions, 5, 0);
+  addonsMenu = question_box(F("Type"), menuOptions, 6, 0);
 
   // wait for user choice to come back from the question box menu
   switch (addonsMenu) {
@@ -1316,13 +1332,17 @@ void addonMenu() {
       consoles80Menu();
       break;
 
-    // Handhelds
     case 2:
+      consoles90Menu();
+      break;
+
+    // Handhelds
+    case 3:
       handheldMenu();
       break;
 
 #ifdef enable_FLASH
-    case 3:
+    case 4:
 #ifdef enable_FLASH16
       flashMenu();
 #else
@@ -1331,7 +1351,7 @@ void addonMenu() {
       break;
 #endif
 
-    case 4:
+    case 5:
       resetArduino();
       break;
 
@@ -1347,7 +1367,6 @@ void consoles70Menu() {
   // Copy menuOptions out of progmem
   convertPgm(consoles70Options, 7);
   consoles70Menu = question_box(F("Choose Adapter"), menuOptions, 7, 0);
-
   // wait for user choice to come back from the question box menu
   switch (consoles70Menu) {
 #ifdef enable_ATARI
@@ -1446,6 +1465,31 @@ void consoles80Menu() {
   }
 }
 
+// Everything that needs an adapter
+void consoles90Menu() {
+  unsigned char consoles90Menu;
+  // Copy menuOptions out of progmem
+  convertPgm(consoles90Options, 2);
+  consoles90Menu = question_box(F("Choose Adapter"), menuOptions, 2, 0);
+
+  // wait for user choice to come back from the question box menu
+  switch (consoles90Menu) {
+#ifdef enable_SUPRACAN
+    case 0:
+      setup_SuprAcan();
+      break;
+#endif
+
+    case 1:
+      resetArduino();
+      break;
+
+    default:
+      print_MissingModule();  // does not return
+      break;
+  }
+}
+
 // Everything that needs an adapter
 void handheldMenu() {
   // create menu with title and 6 options to choose from
@@ -3510,6 +3554,11 @@ void loop() {
   else if (mode == mode_FAIRCHILD) {
     fairchildMenu();
   }
+#endif
+#ifdef enable_SUPRACAN
+  else if (mode == mode_SUPRACAN) {
+    suprAcanMenu();
+  }
 #endif
   else {
     display_Clear();

Cart_Reader/SUPRACAN.ino

@@ -0,0 +1,647 @@
+//******************************************
+// Super A'can MODULE
+// Only tested with HW3 and HW5
+//******************************************
+#ifdef enable_SUPRACAN
+
+/******************************************
+  Menu
+*****************************************/
+static const char acanMenuItem1[] PROGMEM = "Read Rom";
+static const char acanMenuItem2[] PROGMEM = "Read Save";
+static const char acanMenuItem3[] PROGMEM = "Write Save";
+static const char acanMenuItem4[] PROGMEM = "Read UM6650";
+static const char acanMenuItem5[] PROGMEM = "Write UM6650";
+static const char acanMenuItem6[] PROGMEM = "Flash repro";
+
+static const char *const menuOptionsAcan[] PROGMEM = { acanMenuItem1, acanMenuItem2, acanMenuItem3, acanMenuItem4, acanMenuItem5, string_reset2, acanMenuItem6 };
+
+void setup_SuprAcan() {
+  vselect(false);
+
+  // addr as output
+  DDRF = 0xff;  // A0 - A7
+  DDRK = 0xff;  // A8 - A15
+  DDRL = 0xff;  // A16 - A23
+
+  // data as input
+  DDRC = 0xff;
+  DDRA = 0xff;
+  PORTC = 0x00;  // disable internal pull-up
+  PORTA = 0x00;
+  DDRC = 0x00;  // D0 - D7
+  DDRA = 0x00;  // D8 - D15
+
+  // set /RST(PH0), /CS(PH3), C27(PH4), R/W(PH5), /AS(PH6) output
+  DDRH |= ((1 << 0) | (1 << 3) | (1 << 4) | (1 << 5) | (1 << 6));
+  PORTH |= ((1 << 3) | (1 << 5) | (1 << 6));
+  PORTH &= ~((1 << 0) | (1 << 4));
+
+  // set 6619_124(PE4) input
+  DDRE &= ~(1 << 4);
+
+  // detect if flash chip exists
+  PORTG |= (1 << 5);
+  DDRG |= (1 << 5);
+  PORTG |= (1 << 5);
+
+  dataOut_MD();
+  writeWord_Acan(0xaaaa, 0xaaaa);
+  writeWord_Acan(0x5555, 0x5555);
+  writeWord_Acan(0xaaaa, 0x9090);
+
+  dataIn_MD();
+  eepbit[0] = readWord_Acan(0x2);
+  eepbit[1] = readWord_Acan(0x0);
+
+  dataOut_MD();
+  writeWord_Acan(0x0, 0xf0f0);
+
+  dataIn_MD();
+  // set /CARTIN(PG5) input
+  PORTG &= ~(1 << 5);
+  DDRG &= ~(1 << 5);
+
+  *((uint32_t *)(eepbit + 4)) = getFlashChipSize_Acan(*((uint16_t *)eepbit));
+
+  display_Clear();
+  initializeClockOffset();
+
+  // clockgen
+  if (i2c_found) {
+    clockgen.set_freq(1073863500ULL, SI5351_CLK1);  // cpu
+    clockgen.set_freq(357954500ULL, SI5351_CLK2);   // subcarrier
+    clockgen.set_freq(5369317500ULL, SI5351_CLK0);  // master clock
+
+    clockgen.output_enable(SI5351_CLK1, 1);
+    clockgen.output_enable(SI5351_CLK2, 1);
+    clockgen.output_enable(SI5351_CLK0, 0);
+
+    // Wait for clock generator
+    clockgen.update_status();
+    delay(500);
+  }
+#ifdef clockgen_installed
+  else {
+    print_FatalError(F("Clock Generator not found"));
+  }
+#endif
+
+  checkRomExist_Acan();
+  wait();
+}
+
+void suprAcanMenu() {
+  uint8_t mainMenu = 6;
+
+  if (*((uint32_t *)(eepbit + 4)) > 0)
+    mainMenu = 7;
+
+  convertPgm(menuOptionsAcan, mainMenu);
+  mainMenu = question_box(F("Super A'can Menu"), menuOptions, mainMenu, 0);
+
+  switch (mainMenu) {
+    case 0:
+      {
+        readROM_Acan();
+        break;
+      }
+    case 1:
+      {
+        readSRAM_Acan();
+        break;
+      }
+    case 2:
+      {
+        writeSRAM_Acan();
+        verifySRAM_Acan();
+        break;
+      }
+    case 3:
+      {
+        readUM6650();
+        break;
+      }
+    case 4:
+      {
+        writeUM6650();
+        verifyUM6650();
+        break;
+      }
+    case 6:
+      {
+        flashCart_Acan();
+        break;
+      }
+    default:
+      {
+        resetCart_Acan();
+        resetArduino();
+        break;
+      }
+  }
+
+  println_Msg(F(""));
+  print_STR(press_button_STR, 1);
+  display_Update();
+  wait();
+}
+
+static void readROM_Acan() {
+  uint32_t crc32 = 0xffffffff;
+
+  EEPROM_readAnything(0, foldern);
+  snprintf(folder, FILEPATH_LENGTH, "/ACAN/ROM/%d", foldern);
+
+  display_Clear();
+  print_STR(saving_to_STR, 0);
+  print_Msg(folder);
+  println_Msg(F("/..."));
+  display_Update();
+
+  sd.mkdir(folder, true);
+  sd.chdir(folder);
+
+  if (!myFile.open("rom.bin", O_RDWR | O_CREAT))
+    print_FatalError(create_file_STR);
+
+  foldern++;
+  EEPROM_writeAnything(0, foldern);
+
+  draw_progressbar(0, cartSize);
+
+  dataIn_MD();
+  for (uint32_t addr = 0; addr < cartSize; addr += 512, draw_progressbar(addr, cartSize)) {
+    for (uint32_t i = 0; i < 512; i += 2) {
+      *((uint16_t *)(sdBuffer + i)) = readWord_Acan(addr + i);
+      UPDATE_CRC(crc32, sdBuffer[i]);
+      UPDATE_CRC(crc32, sdBuffer[i + 1]);
+    }
+
+    myFile.write(sdBuffer, 512);
+
+    if ((addr & ((1 << 14) - 1)) == 0)
+      blinkLED();
+  }
+
+  crc32 = ~crc32;
+  myFile.close();
+
+  print_Msg(F("CRC32: "));
+  print_Msg_PaddedHex32(crc32);
+  println_Msg(F(""));
+  print_STR(done_STR, 1);
+}
+
+static void readSRAM_Acan() {
+  // create a new folder for storing rom file
+  EEPROM_readAnything(0, foldern);
+  snprintf(folder, FILEPATH_LENGTH, "/ACAN/SAVE/%d", foldern);
+
+  display_Clear();
+  print_STR(saving_to_STR, 0);
+  print_Msg(folder);
+  println_Msg(F("/..."));
+  display_Update();
+
+  sd.mkdir(folder, true);
+  sd.chdir(folder);
+
+  if (!myFile.open("save.bin", O_RDWR | O_CREAT))
+    print_FatalError(create_file_STR);
+
+  foldern++;
+  EEPROM_writeAnything(0, foldern);
+
+  dataIn_MD();
+  for (uint32_t i = 0; i < 0x10000; i += 1024) {
+    for (uint32_t j = 0; j < 1024; j += 2)
+      sdBuffer[(j >> 1)] = readWord_Acan(0xec0000 + i + j);
+
+    myFile.write(sdBuffer, 512);
+  }
+
+  myFile.close();
+  print_STR(done_STR, 1);
+}
+
+static void writeSRAM_Acan() {
+  filePath[0] = 0;
+  sd.chdir();
+  fileBrowser(F("Select a file"));
+  snprintf(filePath, FILEPATH_LENGTH, "%s/%s", filePath, fileName);
+
+  display_Clear();
+
+  if (!myFile.open(filePath, O_READ)) {
+    print_Error(F("File doesn't exist"));
+    return;
+  }
+
+  print_Msg(F("Writing "));
+  print_Msg(filePath);
+  println_Msg(F("..."));
+  display_Update();
+
+  dataOut_MD();
+  for (uint32_t i = 0; i < 0x10000 && myFile.available(); i += 1024) {
+    myFile.read(sdBuffer, 512);
+
+    for (uint32_t j = 0; j < 1024; j += 2)
+      writeWord_Acan(0xec0000 + i + j, sdBuffer[(j >> 1)]);
+  }
+
+  myFile.close();
+
+  dataIn_MD();
+  print_STR(done_STR, 1);
+}
+
+static void verifySRAM_Acan() {
+  print_STR(verifying_STR, 0);
+  display_Update();
+
+  if (!myFile.open(filePath, O_READ)) {
+    print_Error(F("File doesn't exist"));
+    return;
+  }
+
+  uint16_t write_errors = 0;
+
+  dataIn_MD();
+  for (uint32_t i = 0; i < 0x10000 && myFile.available(); i += 1024) {
+    myFile.read(sdBuffer, 512);
+
+    for (uint32_t j = 0; j < 1024; j += 2) {
+      if (readWord_Acan(0xec0000 + i + j) != sdBuffer[(j >> 1)])
+        write_errors++;
+    }
+  }
+
+  myFile.close();
+
+  if (write_errors == 0) {
+    println_Msg(F("passed"));
+  } else {
+    println_Msg(F("failed"));
+    print_Msg(F("Error: "));
+    print_Msg(write_errors);
+    println_Msg(F(" bytes "));
+    print_Error(did_not_verify_STR);
+  }
+}
+
+static void readUM6650() {
+  // create a new folder for storing rom file
+  EEPROM_readAnything(0, foldern);
+  snprintf(folder, sizeof(folder), "/ACAN/UM6650/%d", foldern);
+
+  display_Clear();
+  print_STR(saving_to_STR, 0);
+  print_Msg(folder);
+  println_Msg(F("/..."));
+  display_Update();
+
+  sd.mkdir(folder, true);
+  sd.chdir(folder);
+
+  if (!myFile.open("UM6650.bin", O_RDWR | O_CREAT))
+    print_FatalError(create_file_STR);
+
+  foldern++;
+  EEPROM_writeAnything(0, foldern);
+
+  for (uint16_t i = 0; i < 256; i++) {
+    dataOut_MD();
+    writeWord_Acan(0xeb0d03, i);
+
+    dataIn_MD();
+    sdBuffer[i] = readWord_Acan(0xeb0d01);
+  }
+
+  myFile.write(sdBuffer, 256);
+  myFile.close();
+
+  print_STR(done_STR, 1);
+}
+
+static void verifyUM6650() {
+  print_STR(verifying_STR, 0);
+  display_Update();
+
+  if (!myFile.open(filePath, O_READ)) {
+    print_Error(F("File doesn't exist"));
+    return;
+  }
+
+  uint16_t write_errors = 0;
+  uint16_t len = myFile.read(sdBuffer, 256);
+  myFile.close();
+
+  for (uint16_t i = 0; i < len; i++) {
+    dataOut_MD();
+    writeWord_Acan(0xeb0d03, i);
+
+    dataIn_MD();
+    if (readWord_Acan(0xeb0d01) != sdBuffer[i])
+      write_errors++;
+  }
+
+  if (write_errors) {
+    println_Msg(F("failed"));
+    print_Msg(F("Error: "));
+    print_Msg(write_errors);
+    println_Msg(F(" bytes "));
+    print_Error(did_not_verify_STR);
+  } else {
+    println_Msg(F("passed"));
+  }
+}
+
+static void writeUM6650() {
+  filePath[0] = 0;
+  sd.chdir("/");
+  fileBrowser(F("Select a file"));
+  snprintf(filePath, FILEPATH_LENGTH, "%s/%s", filePath, fileName);
+
+  display_Clear();
+
+  if (!myFile.open(filePath, O_READ)) {
+    print_Error(F("File doesn't exist"));
+    return;
+  }
+
+  uint16_t len = myFile.read(sdBuffer, 256);
+  myFile.close();
+
+  print_Msg(F("Writing "));
+  print_Msg(filePath);
+  println_Msg(F("..."));
+  display_Update();
+
+  dataOut_MD();
+  for (uint16_t i = 0; i < len; i++) {
+    writeWord_Acan(0xeb0d03, i);
+    writeWord_Acan(0xeb0d01, sdBuffer[i]);
+
+    delay(10);  // for AT28C64B write
+  }
+
+  dataIn_MD();
+  print_STR(done_STR, 1);
+}
+
+static void flashCart_Acan() {
+  uint32_t *flash_size = (uint32_t *)(eepbit + 4);
+
+  filePath[0] = 0;
+  sd.chdir();
+  fileBrowser(F("Select a file"));
+  snprintf(filePath, FILEPATH_LENGTH, "%s/%s", filePath, fileName);
+
+  display_Clear();
+
+  if (!myFile.open(filePath, O_READ)) {
+    print_Error(F("File doesn't exist"));
+    return;
+  }
+
+  print_Msg(F("Writing "));
+  print_Msg(filePath + 1);
+  println_Msg(F("..."));
+  display_Update();
+
+  uint32_t i, j, k, file_length = myFile.fileSize();
+  uint16_t data;
+
+  DDRG |= (1 << 5);
+  PORTG |= (1 << 5);
+
+  draw_progressbar(0, file_length);
+
+  for (i = 0; i < file_length; i += *flash_size) {
+    // erase chip
+    dataOut_MD();
+    writeWord_Acan(i + 0xaaaa, 0xaaaa);
+    writeWord_Acan(i + 0x5555, 0x5555);
+    writeWord_Acan(i + 0xaaaa, 0x8080);
+    writeWord_Acan(i + 0xaaaa, 0xaaaa);
+    writeWord_Acan(i + 0x5555, 0x5555);
+    writeWord_Acan(i + 0xaaaa, 0x1010);
+
+    dataIn_MD();
+    while (readWord_Acan(i) != 0xffff)
+      ;
+
+    for (j = 0; j < *flash_size; j += 512) {
+      myFile.read(sdBuffer, 512);
+
+      for (k = 0; k < 512; k += 2) {
+        data = *((uint16_t *)(sdBuffer + k));
+
+        dataOut_MD();
+        writeWord_Acan(i + 0xaaaa, 0xaaaa);
+        writeWord_Acan(i + 0x5555, 0x5555);
+        writeWord_Acan(i + 0xaaaa, 0xa0a0);
+        writeWord_Acan(i + j + k, data);
+
+        dataIn_MD();
+        while (readWord_Acan(i + j + k) != data)
+          ;
+      }
+
+      draw_progressbar(i + j + k, file_length);
+
+      if ((j & 0xfff) == 0)
+        blinkLED();
+    }
+  }
+
+  PORTG &= ~(1 << 5);
+  DDRG &= ~(1 << 5);
+
+  myFile.close();
+  print_STR(done_STR, 1);
+
+  checkRomExist_Acan();
+}
+
+static void checkRomExist_Acan() {
+  // RST to 0
+  PORTH &= ~(1 << 0);
+  NOP;
+  NOP;
+  NOP;
+  NOP;
+  NOP;
+  NOP;
+
+  // /RST to 1
+  PORTH |= (1 << 0);
+
+  cartSize = getRomSize_Acan();
+  romSize = cartSize >> 17;
+  mode = mode_SUPRACAN;
+
+  if (cartSize == 0)
+    print_Error(F("Unable to find rom signature..."));
+  else {
+    print_Msg(F("ROM Size: "));
+    print_Msg(romSize);
+    println_Msg(F(" Mb"));
+  }
+
+  display_Update();
+}
+
+static uint32_t getRomSize_Acan() {
+  uint32_t addr = 0;
+  uint32_t crc32;
+
+  do {
+    // check if there is rom chip exists
+    // pull-up enable
+    DDRC = 0xff;
+    DDRA = 0xff;
+    PORTC = 0xff;
+    PORTA = 0xff;
+    DDRC = 0x00;
+    DDRA = 0x00;
+    *((uint16_t *)sdBuffer) = readWord_Acan(addr);
+
+    // pull-up disable
+    DDRC = 0xff;
+    DDRA = 0xff;
+    PORTC = 0x00;
+    PORTA = 0x00;
+    DDRC = 0x00;
+    DDRA = 0x00;
+    *((uint16_t *)(sdBuffer + 2)) = readWord_Acan(addr);
+
+    // should be them same if chip exists
+    if (sdBuffer[0] != sdBuffer[2] || sdBuffer[1] != sdBuffer[3])
+      break;
+
+    crc32 = 0xffffffff;
+
+    for (uint32_t i = 0x2000; i < 0x2080; i += 2) {
+      *((uint16_t *)sdBuffer) = readWord_Acan(addr + i);
+      UPDATE_CRC(crc32, sdBuffer[0]);
+      UPDATE_CRC(crc32, sdBuffer[1]);
+    }
+
+    crc32 = ~crc32;
+
+    if (crc32 == 0xa2bc9d7a) {
+      if (addr > 0)
+        break;
+    } else {
+      if (addr == 0)
+        break;
+    }
+
+    addr += 0x80000;
+
+  } while (addr < 0x800000);
+
+  return addr;
+}
+
+static void resetCart_Acan() {
+  // set /CS(PH3), R/W(PH5), /AS(PH6) high
+  // /RST(PH0) and C27(PH4) low
+  PORTH |= ((1 << 3) | (1 << 5) | (1 << 6));
+  PORTH &= ~((1 << 0) | (1 << 4));
+
+  if (i2c_found) {
+    clockgen.output_enable(SI5351_CLK1, 0);  // CPU clock
+    clockgen.output_enable(SI5351_CLK2, 0);  // CIC clock
+    clockgen.output_enable(SI5351_CLK0, 0);  // master clock
+  }
+}
+
+static void writeWord_Acan(uint32_t addr, uint16_t data) {
+  uint8_t *ptr = (uint8_t *)&addr;
+
+  PORTF = *ptr++;
+  PORTK = *ptr++;
+  PORTL = *ptr;
+
+  if (*ptr < 0xe0) {
+    // ROM area
+    // /CS(PH3), C27(PH4), R/W(PH5), /AS(PH6) to L
+    PORTH &= ~((1 << 3) | (1 << 4) | (1 << 5) | (1 << 6));
+  } else if (*ptr == 0xec) {
+    // save area
+    // /CS(PH3) to H, C27(PH4), R/W(PH5), /AS(PH6) to L
+    PORTH |= (1 << 3);
+    PORTH &= ~((1 << 4) | (1 << 5) | (1 << 6));
+  } else if (addr == 0x00eb0d03 || addr == 0x00eb0d01) {
+    // UM6650 area
+    // /CS(PH3), C27(PH4) to H, R/W(PH5), /AS(PH6) to L
+    PORTH |= ((1 << 3) | (1 << 4));
+    PORTH &= ~((1 << 5) | (1 << 6));
+  }
+
+  ptr = (uint8_t *)&data;
+  PORTC = *ptr++;
+  PORTA = *ptr;
+
+  NOP;
+  NOP;
+  NOP;
+
+  PORTH &= ~(1 << 4);
+  PORTH |= ((1 << 3) | (1 << 5) | (1 << 6));
+}
+
+static uint16_t readWord_Acan(uint32_t addr) {
+  uint8_t *ptr = (uint8_t *)&addr;
+  uint16_t data;
+
+  PORTF = *ptr++;
+  PORTK = *ptr++;
+  PORTL = *ptr;
+
+  if (*ptr < 0xe0) {
+    // ROM area
+    // /CS(PH3), C27(PH4), /AS(PH6) to L
+    PORTH &= ~((1 << 3) | (1 << 4) | (1 << 6));
+  } else if (*ptr == 0xec) {
+    // save area
+    // /CS(PH3) to H, C27(PH4), /AS(PH6) to L
+    PORTH |= (1 << 3);
+    PORTH &= ~((1 << 4) | (1 << 6));
+  } else if (addr == 0x00eb0d03 || addr == 0x00eb0d01) {
+    // UM6650 area
+    // /CS(PH3), C27(PH4) to H, /AS(PH6) to L
+    PORTH |= ((1 << 3) | (1 << 4));
+    PORTH &= ~(1 << 6);
+  }
+
+  ptr = (uint8_t *)&data;
+  NOP;
+  NOP;
+  NOP;
+
+  *ptr++ = PINC;
+  *ptr = PINA;
+
+  PORTH &= ~(1 << 4);
+  PORTH |= ((1 << 3) | (1 << 5) | (1 << 6));
+
+  return data;
+}
+
+static uint32_t getFlashChipSize_Acan(uint16_t chip_id) {
+  // 0x0458 (8M), 0x01ab (4M), 0x01d8 (16M)
+  switch (chip_id) {
+    case 0x01ab: return 524288;
+    case 0x0458: return 1048576;
+    case 0x01d8: return 2097152;
+  }
+
+  return 0;
+}
+
+#endif