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- Path: dlmlap.supra.com!dan
- From: dan@supra.com (Dan Moore)
- Newsgroups: comp.dcom.modems
- Subject: Re: Supra 28.8 External & Internal
- Date: Thu, 18 Apr 1996 14:01:21 GMT
- Organization: Communications Division of Diamond Multimedia Systems, Inc.
- Message-ID: <dan.963.31764B31@supra.com>
- References: <316d810a.3586172@news.inforamp.net>
- NNTP-Posting-Host: dlmlap.supra.com
- X-Newsreader: Trumpet for Windows [Version 1.0 Rev B.7]
-
- In article <316d810a.3586172@news.inforamp.net> jkajfes@inforamp.net (John Kajfes) writes:
- >I have a 28.8 Supra external modem. I'm curious abou what would happen
- >if you try to flash the external modem with the internal sup1290.exe
- >code which is suppose to be for the Supra 28.8i internal PNP modem?
- >First of all can it be done, either intentionally or inadvertley?
- >Is it can be would this really screw up the modem?
- >Or does the flash program prevent or warn you from attempting to do
- >this?
-
- When a Supra modem goes into flash mode it checks several things in
- the data being downloaded to it. The first thing it checks is the embedded
- checksums in the flash data file, this makes sure that the file hasn't been
- corrupted. Before it begins to write the flash memory it checks an id
- string in the downloaded data to see if it matches the id string in the modem.
- If the id string in the flash data file does not match the modem aborts the
- download and then resets. If the id strings do match the modem will write the
- downloaded data to the flash memory and then continue the download of the
- remainder of the flash data file.
-
- The PC and Mac flasher programs also know how to read the id string
- from the modem and how to read it from the flash data file. They won't even
- attempt to flash a modem with the wrong data file, instead they will display a
- message saying they don't have a flash data file for the modem.
-
- If you are manually flashing the modem you can attempt to send the
- wrong flash data file to the modem. This will fail due to the incorrect modem
- id string in the data file, as explained above.
-
- --
- Dan Moore
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