first configure your computer ip to 192.168.1.23 and start a local tftp
server
place the image.bin within the root folder of this tftp server

now connect the terminal to your ap-120 device

it shows up as here
Copyright 2002-2004 Infineon-ADMtek, Inc.
CPU: ADM5120-175MHz
SDRAM: 32MB
Flash: NOR-2MB
Boot System: ATA-5120-Linux
Loader Version: 1.00.05
Creation Date: 2004.12.20

Press <space> key tree times to enter boot menu..
3

Loader Menu
==================================
[1] Xmodem Download
[2] TFTP Client Download
[3] Print Boot Params
[4] Set Boot Params
[5] Update bootloader
[6] Exit


press 4 now and ignore all fields except the ip address setting by
pushing just enter
enter 192.168.1.1 on "Enter new IP address for this board:"

Please enter your number:4

Set Boot Parameters.
==========================
Current Serial Number:
Enter new serial number:
Serial Number unchanged.
Enter new hardware version:
Hardware version unchanged.
Current mac addres: 00-17-B7-30-00-02
Number of mac address: 1
Enter new mac address (AA-AA-AA-AA-AA-AA):
Enter new number of mac address (between 1-8):
Mac address unchanged.
IP address for this board: 192.168.1.1
Enter new IP address for this board: 192.168.1.1
IP updated successfully.


Loader Menu
==================================
[1] Xmodem Download
[2] TFTP Client Download
[3] Print Boot Params
[4] Set Boot Params
[5] Update bootloader
[6] Exit

Please enter your number:
now press 2


Server IP: 192.168.1.23
Remote File: vmlinus.gz

TFTP Client Menu
===============================
[D]: start download
[S]: set parameters
[X]: exit
Enter your option:

now press "s" and enter the following data

Server IP: 192.168.1.23
Remote File: image.bin

TFTP Client Menu
===============================
[D]: start download
[S]: set parameters
[X]: exit
Enter your option:

now press 'd'

this will download image.bin from your tftp server to your device and
flashes it automaticly

Enter your option:d
Starting the TFTP download(ESC to stop)...............................PASS

Eraseing flash.......PASS
Programming flash....PASS

Server IP: 192.168.1.23
Remote File: image.bin

TFTP Client Menu
===============================
[D]: start download
[S]: set parameters
[X]: exit
Enter your option:


now your unit is flashed. just replug the power cord and it will boot up