CEFDK bootloader and tftp boot

tftp get 192.168.199.150 0x1000000 bzImage
tftp get 192.168.199.150 0x8000000 ramdisk.ext2.initrd.gz
ramdisk 0x8000000 0x8000000
bootkernel -b 0x1000000 "console=tty0 console=ttyS0,115200 root=/dev/ram0 rw init=/linuxrc ramdisk_size=64000000"

Explanations:

1. the second argument of ramdisk command is ramdisk size; 0x8000000 simply works, no documentation further explain if it's compressed ramdisk size, uncompressed ramdisk size, or something else.

2. root=/dev/ram0 is critical for ramdisk boot;

3. init=/linuxrc is also critical for kernel launching the very first init script, without it the kernel will complain;

4. ramdisk_size=xxxx is required if ramdisk is larger than the default settings. I don't know what is the default value, but without this argument, the kernel complains.