The Serial port on the White literati model #1637287 is located on the right side of the device seen in the picture on the right.
there are 4 pins top->down 5v?,TX,RX,GND. connecting these pins to a max232 level converter and then to a serial port on a computer allows you to view the bootloader start up processes and the starting of the linux kernel.
during the boot process there is a 3 second count down to allow a user to enter the bootloader before booting the kernel.
boot zImage from sd that fat32 part boot zImage from sd that fat32 part boot zImage from sd that fat32 part boot zImage from sd that fat32 part ? - alias for 'help' base - print or set address offset bdinfo - print Board Info structure bootm - boot application image from memory branch - enable or disable branch prediction TestMemory - start application at address 'addr' cmp - memory compare cp - memory copy crc32 - checksum calculation dcache - enable or disable data cache dnw - initialize USB device and ready to receive for Windows server (specific) echo - echo args to console erase - erase FLASH memory exit - exit script flinfo - print FLASH memory information go - start application at address 'addr' help - print online help icache - enable or disable instruction cache imls - list all images found in flash itest - return true/false on integer compare loadb - load binary file over serial line (kermit mode) loads - load S-Record file over serial line loady - load binary file over serial line (ymodem mode) loop - infinite loop on address range md - memory display mm - memory modify (auto-incrementing) movi - moviNAND sub-system mtest - simple RAM test mw - memory write (fill) nand - NAND sub-system nboot - boot from NAND device nm - memory modify (constant address) printenv- print environment variables protect - enable or disable FLASH write protection reset - Perform RESET of the CPU saveenv - save environment variables to persistent storage setenv - set environment variables sleep - delay execution for some time test - minimal test like /bin/sh version - print monitor version 1 update boot from sd 2 update kernel from sd 3 update resource from sd 4 update all