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Topic: ROM-Reader for Super Nintendo / Super Famicom Game Cartridges (Read 215039 times) previous topic - next topic

Newbie2

According to the datasheet of the 29W640 the flash commands are pretty much the same as with the 29F033, so if you re-solder the WE wire or change the WE pin in the code and change the flash ID in the code from "04D4" to "22ED" or "22FD", depending on if you have a 29W640FT or 29W640FB, it might just program without any major changes.
Is the code I'd need to change to change the WE pin within the "Write 29F032 flashrom" function in gb.ino? I'm trying hard to attempt to figure things out on my own and not ask too many questions, but narrowing down what to look at would be very helpful.

sanni

Yes it's inside gb.ino, right now WE/WR is set to PH5.

Quote
void setup_GB() {
  // Set RST(PH0) to Input
  DDRH &= ~(1 << 0);
  // Activate Internal Pullup Resistors
  PORTH |= (1 << 0);

  // Set Address Pins to Output
  //A0-A7
  DDRF = 0xFF;
  //A8-A15
  DDRK = 0xFF;

  // Set Control Pins to Output CS(PH3) WR(PH5) RD(PH6)
  DDRH |= (1 << 3) | (1 << 5) | (1 << 6);
  // Output a high signal on all pins, pins are active low therefore everything is disabled now
  PORTH |= (1 << 3) | (1 << 5) | (1 << 6);
Quote
void writeByte_GB(int myAddress, uint8_t myData) {
  PORTF = myAddress & 0xFF;
  PORTK = (myAddress >> 8) & 0xFF;
  PORTC = myData;

  // Arduino running at 16Mhz -> one nop = 62.5ns
  // Wait till output is stable
  __asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");

  // Pull WR(PH5) low
  PORTH &= ~(1 << 5);

  // Leave WE low for at least 60ns
  __asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");

  // Pull WR(PH5) HIGH
  PORTH |= (1 << 5);

  // Leave WE high for at least 50ns
  __asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
}
The pinout.xls from the github will help you with figuring out what Arduino pin is connected to which GB cart slot pin.


Newbie2

Perfect, I will give it a shot and see what happens.

KnightofTime

I don't know exactly why this fixed it but I updated the code on github anyway. :)
The added slot on the design idea I posted is a NES slot but ofc there is no code written for it.
Oh wow, I'm surprised you added an NES slot to the cart reader sanni.

Just wondering if you're working on code for it?  I think I remember seeing another device which can backup/restore NES saves, although I believe it's in the beta stage (as tempting as it is to buy this device, I think I'm gonna stick with the Arduino).  I'm looking forward to hearing more news about the new NES slot in the future.

sanni

Well, I would love to order the new PCB but it's $50 or more just to see if I made any mistakes designing it so I'm probably not going to place the order since there are better alternatives to read NES carts with the new infinitneslives dumper.

The goal of the new PCB design was to make building the Cart Reader cheaper but since a 150x100mm PCB is so much more expensive than a 100x100mm PCB that didn't really happen.
Maybe when PCBs get cheaper in the future I'll build it just for fun.

Newbie2

In terms of the pcb redesign, would doing an nes adapter be feasible as an alternative? The other item that might be attractive to people is a gamegear adapter.

Tried the bennvenn cart, but after making the changes it gets past the "Blankcheck" and erase phase but then stops at the flashing stage. On the plus side, it didn't actually erase the cart, so it still functions as before.

Any additional suggestions?

Edit: Could the fact that MBM29F033C expects 256 bank be an issue? Or does the flashing effectively ignore that and just use whatever it detects the cartridge has (it correctly detects the cart is 128 bank)

pyroesp

Hey, new here, really like the project you made Sanni. Having bought a SFC not too long ago with a few games on ebay, I wanted to read and patch some of my Japanese games.

The github page / wiki has all the links necessary to buy everything you need to build one of these, thanks for that!

My advice, as you mentioned yourself, is to try and keep the PCB to 10x10cm, unless some other PCB fab has a better deal than JLPCB.

Now, I've put the dimensions of your new board (15x10cm) into PCB shopper and JLPCB is still the cheapest at 20$ for 5, https://pcbshopper.com/


I do want to build one, but I'd like to know if and when you're going to update the current design to the new one?
Should I just wait for the new board or go ahead and buy the current version ?

sanni

I'm not planning to update the PCB on github any time soon so you can go ahead and build the current version.

pyroesp

I'm not planning to update the PCB on github any time soon so you can go ahead and build the current version.
All right, just bought the essentials for the SNES.
Some of the components from the BOM list are unavailable, but I found replacements pretty easily.

Hope nothing gets lost in transit from China.

sanni

Any additional suggestions?
First, you should make sure that the cart gets erased properly.
So you could, for example, add while(1); into the function void writeFlash_GB:

Quote
delay(100);
    println_Msg(F("Erasing flash"));
    display_Update();

    // Erase flash
    writeByte_GB(0x555, 0xaa);
    writeByte_GB(0x2aa, 0x55);
    writeByte_GB(0x555, 0x80);
    writeByte_GB(0x555, 0xaa);
    writeByte_GB(0x2aa, 0x55);
    writeByte_GB(0x555, 0x10);

    dataIn_GB();

    // Read the status register
    byte statusReg = readByte_GB(0);

    // After a completed erase D7 will output 1
    while ((statusReg & 0x80) != 0x80) {
      // Blink led
      PORTB ^= (1 << 4);
      delay(100);
      // Update Status
      statusReg = readByte_GB(0);
    }

    // Blankcheck
    println_Msg(F("Blankcheck"));
 display_Update();
to:

Quote
delay(100);
    println_Msg(F("Erasing flash"));
    display_Update();

    // Erase flash
    writeByte_GB(0x555, 0xaa);
    writeByte_GB(0x2aa, 0x55);
    writeByte_GB(0x555, 0x80);
    writeByte_GB(0x555, 0xaa);
    writeByte_GB(0x2aa, 0x55);
    writeByte_GB(0x555, 0x10);

    dataIn_GB();

    // Read the status register
    byte statusReg = readByte_GB(0);

    // After a completed erase D7 will output 1
    while ((statusReg & 0x80) != 0x80) {
      // Blink led
      PORTB ^= (1 << 4);
      delay(100);
      // Update Status
      statusReg = readByte_GB(0);
    }

    // Blankcheck
    println_Msg(F("Blankcheck"));
 display_Update();
    while(1);
The while(1); will make sure that after the erase nothing will be written to the cartridge. Then once "Blankcheck" is displayed you can switch the Cart Reader off and then on again and try to dump the cartridge and then check with a hex editor like HxD if the whole file you dumped consists out of 0xFF, meaning it erased fully.

If it did not erase then you need to change the code according to the datasheet of the used flashrom until it is erased.

If it is fully erased you can remove the while(1); again and write a rom to the cartridge, then dump the cartridge again and compare the dump in HxD to the file you wanted to write and see where exactly the writing failed.

Pirateiro_Digital

sanni, can I use this card reader to mount the cartreader?
https://pt.aliexpress.com/item/FREE-SHIPPING-1PCS-LOT-Reading-and-writing-module-SD-Card-Module-Slot-Socket-Reader/32262829840.html?spm=a2g0s.9042311.0.0.6acfb90aEdyPlI

Or can I use it directly from your tutorial without converting to SD?

I would like to save on these pcb.

sanni

Yes, you can use both directly:
https://www.aliexpress.com/item/FREE-SHIPPING-1PCS-LOT-Reading-and-writing-module-SD-Card-Module-Slot-Socket-Reader/32262829840.html
https://www.aliexpress.com/item/Micro-SD-card-mini-TF-card-reader-module-SPI-interfaces-with-level-converter-chip/1000001126725.html

Pirateiro_Digital

Thank you sanni!
Yes, you can use both directly:
https://www.aliexpress.com/item/FREE-SHIPPING-1PCS-LOT-Reading-and-writing-module-SD-Card-Module-Slot-Socket-Reader/32262829840.html
https://www.aliexpress.com/item/Micro-SD-card-mini-TF-card-reader-module-SPI-interfaces-with-level-converter-chip/1000001126725.html
Thank you!

Newbie2

Sanni, really appreciate your guidance in response to my questions. The erase didn't work, I am going to reach out to BennVenn to see if he has thoughts on what actions are necessary to get it to erase. Irregardless of whether I suceed, I very much appreciate your assistance.

Merix347

Hi There! I am looking into building my own 64 rom reader and was excited to see this project! I was looking at the github for the code and the specs and noticed there was no pcb file for 64 hardware variant.


This is the cart reader variant I want to build:
https://github.com/sanni/cartreader/wiki/Cart-Reader-64

Am I missing something? Thanks

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