beautypg.com

Using flash to upgrade modem firmware – Multi-Tech Systems MT5600ZDX User Manual

Page 68

background image

68

Model MT5600ZDX

Reading a Message
When you log on, the BBS will tell you if you have a personal message

(mail). At the prompt Would you like to read it now?, type R to read the

message. This is the only point at which you can read your mail, since you

cannot read any messages from the Message Menu.

Leaving a Message
The Multi-Tech BBS has no public discussion areas. To leave a personal

message, select the Message Menu by typing M at the Main Menu. Type E,

then press RETURN to select the Sysop conference. Enter the name of the

recipient (or “Sysop”), the subject, and the message text. Press ESCAPE to

finish, then type S to save the message and exit. To abort the message at

any point, leave any of the fields blank and press RETURN.

Bulletins
When you log on, the BBS will ask if you would like to view the bulletin

menu. The bulletins are menu-driven; to read a bulletin, enter its number.

You can also access the bulletins by typing B at the Main Menu.

Using Flash to Upgrade Modem Firmware

The linear flash memory downloader in the modem firmware allows flash

memory connected to the modem external memory bus to be upgraded

with revised modem firmware. This process transfers (uploads) the

upgraded modem firmware (data) from the host computer to the modem

which transfers (downloads) the data to the flash memory device. Note that

this downloader function must be provided in modem MCU firmware

initially installed in external flash memory, i.e., the downloader does not

support the programming of blank flash memory. Programming the flash

memory device is a two-step process:

A. When the AT** command is issued, the modem firmware boot loader

is invoked and you will first load a flash load module (FLM) into the

modem’s RAM. The FLM contains the programming algorithm for the

flash memory device being programmed and any messages that may be

sent during the load process.

B. Load the new modem firmware which the FLM will then program into

the flash memory device.

Flash Procedure: