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1991-01-21
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3KB
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107 lines
Responsible: Remco Treffkorn CompuCom.
This is an informal document. The information contained herein
is hoped to be accurate. If you find anything you want to have
changed or corrected please contact me at the HQ BBS.
CCSP.EXE: the CSP3 protocoll.
=============================
Status:
Version 0.80beta.
Known bugs:
None so far...
Hardware required:
A SpeedModem.
At least a '286/12, slower machienes might work,
but with a performance penalty.
The program needs ~150 Kbyte for itself.
Description:
CCSP.exe is an external protocoll to be used with
BBSs and communication packages like PROCOM(+),
Boyan, Telix, Qmodem...
The installation depends on the package you are using.
CCSP uses data compression to get your file over the
the line faster. It does not rely on the error correction
feature of the SpeedModem. It can (and should) be used
with the *H1 setting for comm programs, BBSs use *h2.
CSP3 is able to achieve up to a 4 to 1 data compression
ratio, but only on certain ASCII files and some data files.
If something is VERRY compressable using a program like
PKARC or PKZIP then CSP3 will archieve excelent results.
Already compressed files will not be compressed any more
and CSP3 will not gain any speedup in these cases.
Generally spoken: In cases where V.42bis will not
compress the data any more, don's expect CSP3 to do so.
In cases where MNP5 is used to some advantage expect a
much higher compression rate from CSP3.
A word of caution: CSP3 uses a lot of 'coputer muscle'
to compress the data. If you have not at least a '286/12
the compression might actually take longer than the
transfer of data. You will not get the full performance.
Receiving data on a slow machiene (downloading) should
work fine, since the decompression is much less demanding.
Usage:
Upload:
CCSP -b<baudrate> -p<port number> -t <filename>
Download:
CCSP -b<baudrate> -p<port number> -r <filename>
Baudrates: 9600 / 19200
Port Numbers: 1-4
Filename: The name of the file to send/receive.
On downloading the <filename> is
optional. If no name is given, the
file will get the name the sender
supplied. In case of a name conflict
the already existing file will not be
overwritten, but the newly received file
gets a filename with the last character
changed to a numeric value.
Examples:
ccsp -b19200 -p2 -t c:\ul\test.txt
This line will upload the file
'test.txt' on the c: drive in the
directory \ul using com port 2 and set
the baudrate to 19200.
ccsp -b19200 -p4 -r
This line will receive a file using
com port 4 at 19200 baud. The name of
the file will be the same as on the
senders side.
Setup for various communication packages:
Help!!
If you have set up CSP3 for ANY software, please
share your wisdom. Drop me a message at the
HQ BBS.
Good Luck! and thanks for your help in beta testing CCSP.
Remco Treffkorn.