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The PMON is an Open Source system element combining both BIOS and boot loader functionalities and used for embedded systems. While more limited than a generic BIOS, it shines compared to most boot loaders. Used as such in Loongson-based machines, a lot of work has been put to improve its functionalities.
Main Pmon characteristics:

• Ext2, fat32 and Ram file system support
• Network access (tftp), disk access and flash access support
• Built-in debugging features
• USB 2.0 Mass Storage support
• MIPS, ARM and PowerPC platform support
• BSD Licensed

In order of importance in day-to-day operations, the commands you will need the most are introduced below. For the full manual please consult the complete manual.

DEVLS: list devices.

 devls [-an]

-a show all device types
-n show network devices

Example:

PMON> devls
Device name  Type
usbg0        DISK
rtl0         INET

In your Gdium, usbg0 is the GKey and rtl0 the network interface

LOAD: loads a file.

load [-options] pathname

-o offset the document is loaded into memory load_address + offset Office.
-f addr file loaded into flash Office address addr.
pathname to load the file path or URL.
h load check other options.

Examples: load at the first hard disk partition (pmon recognize only the first partition) kernel:

load /dev/fs/ext2@wd0/boot/vmlinux  # the first partition is the ext2 file system
load /dev/fs/ext2@wd0b/boot/vmlinux # load the second partition of the core document, wd0c, wd0d, for the third, four divisions.

Tftp from a remote server to load the kernel: (This feature is repeated compiler easily debug kernel)

load tftp://192.168.10.100/vmlinux # first configured network

Other formats:

load /dev/fs/iso9660@cd0/boot/vmlinux
load /dev/fs/ext2@usbg0/boot/vmlinux
load /dev/ram@address
load /dev/ram@address,size
load /dev/ram/logger