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Created Calibrating the ClockGen (markdown)

sanni 2024-07-06 20:25:03 +02:00
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Calibrating-the-ClockGen.md Normal file

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To calibrate the Clock Generator you first need to enable it in config.h by removing // in front of the following two options:
````
/****/
/* [ SNES Core/CLOCKGEN: Read Clock Generator Calibration Data ---- ]
Toggle clock calibration menu and whether or not to use calibration data from snes_clk.txt
*/
#define OPTION_CLOCKGEN_CALIBRATION
#define OPTION_CLOCKGEN_USE_CALIBRATION
````
Then you find a new menu entry under "Super Nintendo/SFC" called "Calibrate Clock".
Once the calibration function was loaded place 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)
![IMG_3882](https://github.com/sanni/cartreader/assets/19169494/82164cc5-f895-49bc-96ca-6391367a1f84)
![](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.
Video:
[![IMAGE ALT TEXT HERE](https://img.youtube.com/vi/F9LaQG_lc-Q/0.jpg)](https://www.youtube.com/watch?v=F9LaQG_lc-Q)