home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Alles Voor Internet / Tout Pour Internet
/
alles voor internet.iso
/
MacInternet™
/
BBS
/
QuickBDA
/
About QuickB DA.txt
next >
Wrap
Text File
|
1990-12-04
|
9KB
|
213 lines
QuickB DA
------ --
v.1.0 of Dec. 4, 1990.
QuickB Desk Accessory was written by Raymond Lau.
Copyright 1988,89, Raymond Lau.
QuickB Download is shareware. Try it a few times. If you like it, find
it useful, or save some money off your CompuServe bills, please register
it by sending $15 to the author:
Raymond Lau
100-04 70 Ave.
Forest Hills, N. Y. 11375-5133
U. S. A.
(Note: Registered QuickB Download users need not re-register.)
Introduction
------------
QuickB DA is a desk accessory written for the CompuServe user who uploads and
downloads frequently. QuickB is a new protocol which allows for significant
speed gains and time savings when up/downloading from CompuServe. While some
telecom programs are starting to support the QuickB protocol, many others
do not. With QuickB DA, you can take advantage of this protocol from within
these telecommunications programs.
Relation to QuickB Download
-------- -- ------ --------
Some of you may be familiar with my QuickB Download DA. This is a direct
successor to it. This allows you to upload as well as download.
Installation
------------
To install QuickB DA, you should be familar with the operation of
Apple's Font/DA Mover. If you are not, please consult the appropriate
documentation before continuing.
QuickB DA may be installed into the System file, where you can use
it in any communications program, if you use more than one. It may also
be installed directly into your communications program(s) or Suitcase and
Master Juggler, etc. files.
Operation
---------
Make sure your telecom program is set for 8 bits, no parity, 1 stop bit.
If it is set for 7 bits, QuickB DA will not function properly.
Operation is very straight forward.
Initiate the QuickB upload or download process on CompuServe.
For example, say you are browsing a file description and you want
to download that file. Just type "dow /proto:qb" at the prompt. Or
you can go through the menu system and pick the QuickB option...
CompuServe will prompt you for a file name. Type in an appropriate
file name. (This is the "primary" file name as will be explained
later.)
Now, go to the Apple menu and select QuickB DA. If you are running
MultiFinder, you should also hold down the option key as you select
QuickB and keep holding it down until the QuickB window comes up.
(This launches QuickB under your telecom program's "layer" and prevents
QuickB from competing with it for the serial port.)
After some negotiations with the CompuServe mainframe, you will be
prompted either with a standard Save As dialog (for downloading) or a
standard Open dialog (for uploading). For downloading, you
can select the destination folder to save the downloaded file. For the
file name, type in a filename. (This is the "last choice" file name --
to be explained shortly!) Or just click Save to use the default.
That's all there is to it! Now sit back and watch the file transfer
proceed.
[A small problem. CIS isn't always too responsive. If you see
that the download isn't beginning within a reasonable amount of
time, abort and try again. Sometimes CIS is so overloaded that it
gets confused and goes "out of sync" at the beginning.]
(NOTE: When using Red Ryder, you must uncheck the Enable CIS 'B' option.
If you don't, Red Ryder will take over and CompuServe will think that you
want to use regular B rather than the extended QuickB with QuickB
Download.)
File Naming
---- ------
QuickB DA uses the following procedure when naming files on downloading:
For MacBinary Files:
(including applications, DAs, FKEYs, MacWrite files, StuffIt archives,etc.)
• The original file name, the one the file was uploaded with, will be used
first.
• If a file already exists by that name, the "last choice" file name
will be used. This is the file name you typed into the dialog box
when you were prompted with the Save As dialog box.
(Since you selected this as the "last choice" name, if a file already
exists, it will be deleted and replaced.)
For text and other non-MacBinary files:
• The file name you typed in at the "Filename:" prompt will be used.
This is why this is referred to as the "primary" file name.
• If a file already exists by that name, the last choice file name
will be used. This is the file name you typed into the dialog box
when you were prompted with the Save As dialog box.
(Since you selected this as the "last choice" name, if a file already
exists, it will be deleted and replaced.)
If this seems unneccessarily confusing, don't worry! You don't have to
memorize it per se... In most cases, this procedure would be what you
would want intuitively.
Aborting
--------
Hold down the command and period keys until you hear a beep to abort the
transfer process. This works MOST of the time. At times, CompuServe
may not recognize the abort sequence sent by QuickB DA. If you
think CompuServe is hanging on you after you issued an abort and QuickB
DA has closed itself, type in a sequence of four control-P's.
Wait 3-5 seconds. Repeat 2-4 times if needed. Usually, this "Panic
Abort" sequence is recognized if it is sent 3 times. (It SHOULD be
recognized the first time according to the CompuServe documentation, but
in practice, it usually takes 3 panic abort sequences.)
Why No Background?
--- -- -----------
You may ask why not have QuickB Download work in the background? The
answer is simple. If I were to make it work in the background, it would
require you to quit from your communications program before you can run
QuickB DA or else the two would compete for the serial port...
Other Products
----- --------
Other products I have written include (as of 12/4/90):
StuffIt Classic -- a file compression and archival program that allows
you to save disk space and file transmission time. Your archives
are as flexible as the file system itself. You can enter folders
saved within archives, add more files to and delete files from
existing archives... As an added feature, your files can
optionally be scanned for currently known virrii as they're being
stuffed into or unstuffed from an archive.
($25 shareware: available online and from Aladdin Systems, Inc.)
StuffIt Deluxe -- an enhanced version which includes support for
viewing multiple archives at once, encryption,
viewing files in an archive, copying and moving
files within and amongst archives, perform common
operations right from your Finder desktop with
Magic Menu, etc.
($99.95 suggested retail available from many mail
order sources and Aladdin.)
Shortcut -- a utility that greatly enhances your standard file Open
and Save As dialogs by allowing you to maintain lists of
commonly used files and folders and to access them with
a single flick of the mouse or a few key presses. Other
features include creation of new folders, deletion of
files, finding lost files (including those in StuffIt
archives), unstuffing files... and soon, access to
StuffIt archives from right within the Open dialog box,
ability to view certain files before opening them,
and more!
($79.95 suggested retail available from many mail order
sources and Aladdin.)
Aladdin Systems, Inc. may be reached at:
Deer Park Center, #23A-171
Aptos, CA 95003-4723
408-685-9175
I may be reached at my address at the top of this document.
QuickB Protocol
------ --------
(For the technical types and the curious. With editorial comments.)
CompuServe's QuickB protocol is an extension of their CIS B protocol.
The version QuickB Download implements is current as of Jan. '88.
It provides for a maximum packet size of 1024 bytes (1k) to reduce time
spent in error checking. It allows for a one packet send ahead facility.
(otherwise known as sliding window or windowed.) It uses XModem style
CRC (bits reversed from CRC-CCITT standard) for error checking and
correction.
It has the ability to fall back to smaller sized packets if the host
doesn't support 1k packets. It can also fall back to no send ahead and
checksum error checking. These capabilities are meant for communicating
with someone using older versions of CompuServe's Vidtex communications
software on other computers. There isn't a version for the Mac that I
know of.