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G8MNY > TECH 28.04.07 09:10l 121 Lines 5467 Bytes #999 (0) @ WW
BID : 12483_GB7CIP
Read: GUEST OE7FMI
Subj: Decoding BBS Data files
Path: DB0FHN<DB0FOR<DB0SIF<DB0KH<DB0EAM<DB0ERF<DB0FBB<DB0IUZ<DB0GOS<ON0AR<
SV1CMG<ON0BEL<GB7CIP
Sent: 070427/2305Z @:GB7CIP.#32.GBR.EU #:12483 [Caterham] $:12483_GB7CIP
From: G8MNY@GB7CIP.#32.GBR.EU
To : TECH@WW
By G8MNY (New 10 Apr 07)
For those of you who are still unable to use these BBS bulletins, here is how I
manually do it.
The files are flagged as B$D in the BBS TSD field. They may contain data such
as pictures, programs, databases, sounds etc. often PKZip or JPEG compressed
which has then been encoded in 7+ format to go over the BBS text system.
ENCODING
~~~~~~~~
Data Compressor Compressed BBS Text Sent BBS
Files Program File Converter Text friendly
Program Files
.DAT \
.TXT ³ ³ SEND.P01 10K
.BAS \__PKZIP________NAME.ZIP_______7Plus_______/ SEND.P02 10K
.COM / Or a PICTURE.JPG \ SEND.P03 10K
.EXE ³ say 33k ³ SEND.P04 8K
.DLL / Total=38k
Total=120k
The part files (normally more than one) are numbered in HEX, part 1 = P01, P02
up to PFF = 255 parts. File size by 7+ default is limited to about 10k, but
nowadays there is no good reason for this & larger files can easily be made
with the 7PLUS/SB=36000 switch to make up to 36k files!
Inside a 7+ bbs data file as well as the usual BBS headers & tails you will
find this sort of thing...
7plus file: NAME.P01 (1 kBytes) - 001/004
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