Error msg:
 
	 
	U-Boot SPL 2024.01-armbian-2024.01-S866c-P6135-Ha9af-V6d37-Bda0a-R448a (Sep 19 2024 - 19:48:11 -0400) 
	DRAM base address is defined as 0x40000000 
	DRAM has 15 b/raw, 10 b/col, 4 B/width, 1 #rank and 8 #bank 
	DRAM top address must be less than 0x40000000 
	DRAM: 1024 MiB 
	Trying to boot from MMC2 
	mmc_load_image_raw_sector: mmc block read error 
	SPL: failed to boot from all boot devices 
	### ERROR ### Please RESET the board ###
 
	 
 
	with a newer rev
 
	 
	U-Boot SPL 2024.01-armbian-2024.01-S866c-P4a40-H8869-Vad24-Bb703-R448a (Jul 11 2025 - 03:34:00 +0000) 
	DRAM base address is defined as 0x40000000 
	DRAM has 15 b/raw, 10 b/col, 4 B/width, 1 #rank and 8 #bank 
	DRAM top address must be less than 0x40000000 
	DRAM: 1024 MiB 
	Trying to boot from MMC2 
	MMC Device 1 not found 
	spl: could not find mmc device 1. error: -19 
	SPL: failed to boot from all boot devices 
	### ERROR ### Please RESET the board ###
 
	 
 
	it boots fine with miniarch from mmc. The Armbian SD loads fine to emmc on other units and they boot ok from mmc!