Re: Need help finding a modem for a IIgs

[thoang@orion.oac.uci.edu (Trangdaithi Hoang)]

In article <1994Nov18.180937.12431@cuok.cameron.edu>,
Thomas A. Compter <fh18@cuok.cameron.edu> wrote:
>Chris Deschu (cdeschu@nyx10.cs.du.edu) wrote:
>
>> Well, Macwarehouse says it was made by Hayes, but I called Hayes to
>> get some information about the newer one, the Magnum 28.8, and Hayes
>> says that they have no idea what I'm talking about, that they don't
>> make any non-hayes labeled products. If anyone knows the answer,
>> I was calling to find out if the Magnum 288 would ever be upgraded or
>> upgradable to the new CCITT v.34 standard, since it's only v.FC now.
>> I'm going to call Macwarehouse back and see if they would like to
>> revise their statement. 
>
>I thought the ad said:  "Manufactured under License from Hayes"  which
>might be legalese for nothing more than licensed to say "Hayes compatible"

The surest way to find out is to open up the modem.  If it's actually
made by Hayes it would have the Hayes name silkscreened on the PCB.
Also, Hayes 28.8k v.FC modems use a Rockwell v.FC dsp and a Motorola
68302 microcontroller.  Most other 28.8k v.FC modems use a different
microcontroller (possible one by Rockwell).  Upgrading to v.34 requires
that you replace the Rockwell v.FC dsp with a v.34/v.FC dsp and update
the firmware by replacing an EEPROM (it helps if both chips are
socketed).  If you can't order the v.34 upgrade from the manufacturer
maybe you can order it from a different manufacturer (as long as their
modem is similar and uses the same microcontroller).