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Tweaking FIFO

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moxiespal

Technical User
Aug 12, 2001
10
US
Although my 56k modem works fine and I am really not in a hurry, I wonder, why did they stopped at 56k, why not 112k modems, 2 meg modem, etc.
So why couldn't I not adjust the FIFO transfer rate in the registry from 8 to 16 bytes.
By default the RX(Receive) FIFO is 8 bytes and the TX(Transfer) FIFO is 1 byte.
And I believe this could be accomplised by HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Serial. Modify the RxFIFO and TxFIFO with the REG_DWORD value of 16 decimal.

My question: Since one of my bright ideas caused a BSD, I have been reluctant to try only the proven or at the least, try after receiving advise. So, would anyone have a clue as to the outcome.

Thanks for reading.
 
Hi,

They stopped at 56k because of the physical limitations of the standard twisted pair telephone line. Your 56k modem will, in fact, not even be running at 56k!

Of course now you've got other technologies like Broadband and ISDN fixed lines which should eventually replace all modems.

I wouldn't like to take a guess at what would happen if you made those registry changes:)

RayWilson
rw@george-heriots.com
 
Being a user of the internet for 6 years, I have paid a total of $9.95 for ISP service. The technology is there, and they, the cable and phone companies are more interested about what is in your wallet. A new V.92 modem is now availalbe, well it only transfers faster, not receives faster, but my point is, don't fall for this 'bandwidth' limitation business. It's there, let's find it!
 
It would be nice if all phone lines were digital fiber optic voice over data computing devices with network address. If you do not like my post feel free to point out your opinion or my errors.
 
Telephone lines are affected by attenuation, the weather, magnetic fields, cross talk etc as well as people using it for the telephone. You may be able to squeeze a little extra bandwidth from you connection but it really isn't worth it (IMO) with the newer technologies. You are very cynical about ISPs. They want to offer the best service so that you'll use them :)
 
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