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.
<per> 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 </per>