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echo: suprafax
to: JONAS MAEBE
from: PATRICK MOORE
date: 1996-06-19 10:52:00
subject: SUPRA V.34 28.8K

JM>Still no difference. Under clean Dos (Frontdoor), I get with X00 a
JM>CRC error as soon as the comms protocol switches to 8192 bytes
JM>packets. It restarts then with 512, then 1024 and so on 'till 8192
JM>without any crc error, but as soon as it reaches 8192, I get a CRC
JM>error again. Yet, under OS/2 in a dosbox, not a singel problem! I
JM>really can't understand it...
        Viva OS/2! :-)
JM>I've got the 1.400-04 beta now, and I can't but say that it's GREAT!
JM>I don't know what you guys did to the code, but the overall
JM>transmission speeds are really improved, especially when sending. Has
JM>there been some change in the compression algo? Because now, for the
JM>first 200-300Kb of every file (zip/arj/rar/...), I usually get a cps
JM>of about 5000 (this cps used to last only for the the first 10kb or
JM>so)! Then it drops to 3350-3500, at which it stays (at least for 1
JM>Meg, and I don't suspect it to change still heavily after that).
JM>Also, the sending (in Terminate) is very irregular: nothing happens
JM>for about 1/4th of a second and then suddenly two or three bytes are 
sen
JM>t. My guess is that this is just that the FIFO is updated only after
JM>2 or 3 bytes have been seent to the modem, but with the former flash
JM>rom this didn't occur. Further, something I've wondered about already
JM>for a long time: when the supra sends data (at any baud rate), you
JM>see the SD led flashing with regular intervals, but when receiving
JM>data (even when from another supra at 28.8), the RD led seems to be
JM>constantly on. Is this because the Supra sends in "blocks" and the
JM>other modem in a "stream" or something like that?
        This pattern is normal.  In most cases the computer is able
        to send information to the modem faster than the information
        can be sent to the remote end.  The data comes from the
        remote modem in a constant, but slower stream.  In most cases
        the RD led is really turning on and off fast enough your 
        eye never sees it as being off (it may however look brighter
        or dimmer as times depending on the amount of time it is 
        really turned off).
CMPQwk1.42 331þIs the latest ROM code in your modem and the modem(s) it 
lls?
--- FLAME v1.1
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* Origin: Supra BBS - Technical Support is "SUPRA CORP" (1:357/4)

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