How to adjust the Geometry manually - ZFEbHVUE/Batocera-CRT-Script GitHub Wiki

How to Adjust the Geometry Manually

Note: If you only use the CRT for Batocera, it is recommended to adjust the horizontal position using the service menu first.

Step 1: Open the Geometry Tool

From SSH, type one of the following commands depending on your resolution:

DISPLAY=:0 geometry 640 480 60

or

DISPLAY=:0 geometry 320 240 60

Use a connected keyboard to adjust the settings.

  • Switch between different grids using the Tab key.
  • When done, press Enter.

The tool will output something like this in the terminal:

Final geometry: 1.0:4:-2
Final crt_range: 15625.0-16200.0,49.5-65.0,1.665,4.693,8.326,0.159,0.191,1.020,0,0,192,288,448,576

Step 2: Update switchres.ini

Edit the switchres.ini file to use the custom monitor profile.

  1. Change the monitor profile from arcade_15 to custom:

    Before:

    monitor                   arcade_15

    After:

    monitor                   custom

  2. Replace the crt_range0 line:

    Before:

    crt_range0                auto

    After:

    crt_range0                15625.0-16200.0,49.5-65.0,1.665,4.693,8.326,0.159,0.191,1.020,0,0,192,288,448,576

  3. Save the switchres.ini file.

  4. Save the changes outside the userdata folder:

    batocera-save-overlay

  5. Reboot the system:

    reboot

Generate a New Custom EDID File for Your Monitor Profile (Optional)

Step 1: Create the EDID File

Run the following command:

switchres 641 480 60 -f 641x480@60 -i switchres.ini -e

This will generate a file named custom.bin.

Step 2: Make the Boot Partition Writable

mount -o remount,rw /boot

Step 3: Copy the EDID File

Copy custom.bin to the folder:

/lib/firmware/edid/

Make sure the file has the correct permissions (0600).

  • Using WinSCP:

    • Right-click the file, go to Properties, and verify the permissions.

  • Or set permissions via SSH:

    chmod 600 /lib/firmware/edid/custom.bin

Step 4: Edit the syslinux.cfg Files

Open the following files in Notepad++:

  • /boot/boot/
  • /boot/boot/syslinux/
  • /boot/EFI/
  • /boot/EFI/BOOT/

You should now have 4 files open.

Step 5: Update EDID File Path

In each file, locate the line:

edid/arcade_15.bin

Change it to:

edid/custom.bin

Step 6: Save Changes and Reboot

  1. Save the changes:

    batocera-save-overlay

  2. Reboot the system:

    reboot