sudo ./osmocon -p /dev/ttyUSB0 -m c123xor ../../target/firmware/board/compal_e88/loader.compalram.bin

sudo ./osmoload memload 0x820000 ../../target/firmware/board/compal_e88/monitor.highram.bin

sudo ./osmoload jump 0x820000

This solution works pretty well!

./osmocon -p /dev/ttyUSB0 -m c123xor -c ../../target/firmware/board/compal_e88/monitor.highram.bin ../../target/firmware/board/compal_e88/chainload.compalram.bin

I'm not able to make this one working. The fw is downloaded but not run.

monitor.highram.bin has been changed into rssi.highram.bin.