The example you are trying to load (vk-lcdXXrta.bin) relies on existing LCD board. There is EEPROM on it with EDID data, which tells the RZ video controller how to be initialized for the current plugged display. So no LCD board means no initialization means no signals on J9. The SD Boot tool (SDHI FAT Loader) is designed to copy to & run applications from internal or external RAM, so you should place your code in regions [0x200A0000 0x209FFFFF] or [0x08000000 0x09FFFFFF]. The address space [0x20020000 0x2009FFFF] is reserved for the SD Bootloader. Here is ld file for the default ini one loading the web server demo.
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