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Updated Reading SNES carts (markdown)

sanni 2024-07-06 20:26:19 +02:00
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Reading-SNES-carts.md

@ -17,18 +17,7 @@ To unlock cartridges with SA-1 you need both the Adafruit Clock Generator and th
It's very important to provide the Nintendo Cart Reader with a high quality power source for dumping SA-1 games, not all USB ports will work. Best use a 5V/2A phone charger. An original iPhone or Amazon Fire Tab charger works great while a cheap Chinese phone charger might not unlock SA-1.
You also will have to install a 470uF capacitor between VCC and GND to improve the Cart Readers supply power. Sometimes disabling the CLK1 switch will improve unlocking.
Optionally you can calibrate the Clock Generator by removing "//" in front of "#define clockgen_calibration" and "#define clockgen_installed" in Cart_Reader.ino and then selecting "Calibrate Clock" in the SNES submenu.
Once the calibration function was loaded press one end of a jumper wire against SNES slot pin 43(A18/BA2) and the other end of the wire against one of the following pins and it should read those values:
- 3072000.00 Hz when connected to SNES slot pin 56(CIC Clock)
- 4000000.00 Hz when connected to SNES slot pin 1(EXT Clock)
- 1000000.00 Hz when connected to SNES slot pin 57(CPU Clock)
![](https://i.imgur.com/srywncH.jpg)
![](https://i.imgur.com/Dpu4ivo.jpg)
Once you have adjusted the clock to match the values more closely hold the button for a very long time and let it go to save the setting.
Optionally you can calibrate the Clock Generator like explained [here](https://github.com/sanni/cartreader/wiki/Calibrating-the-ClockGen).
Most times it needs a second try to unlock the SA1 cartridge. Simply power cycle the SA1 chip by switching the cart reader off and on again.