This document assumes that you are familiar with Dataview. It
describes only the revisions that have occured to version 1.0.
New users should read the manual, filename dataview.txt, and
then read this document for updates/changes.

New features of version 1.0:

1.) The print command has been rewritten, and now produces much
    prettier plots on paper. They are also larger than the old
    plots used to be and should work with virtually any printer.
    For you programmer types, I am now using the printer object
    rather than printform.

2.) Downloading from the altimeter (or the OBC) is now built into
    dataview. It is, however, a separate .exe file, named
    download.exe (included in dataview.zip). This was necessary
    because the download program is a Qbasic program. When you
    execute the Download command from dataview, it "chains"
    (actually issues a DOS shell command) to download.exe, does
    the download, and then returns to dataview. Since the
    download program is separate, dataview needs to know where it
    is, since it may be in a directory different from dataview.
    A new menu item has been added, named DOWNLOAD. Under this
    item are two choices, SET PATH and DOWNLOAD. The DOWNLOAD
    choice will not be enabled (it will be grayed out) until the
    SET PATH choice is executed. SET PATH will display a standard
    windows open screen, which is used to set the path to 
    download.exe. Once it has been located and highlighted, hit
    OKAY. This will cause the DOWNLOAD choice to become enabled.
    To exit the SET PATH command, hit the CANCEL option. Once
    DOWNLOAD has been enabled, set your altimeter up to dump
    and select the DOWNLOAD choice under the DOWNLOAD menu item.
    Download will allow you to input the header information and
    specify the directory and filename to save the data under.
    DOWNLOAD times out and returns to dataview in 4 seconds if no
    data is received from the altimeter. To exit DOWNLOAD and 
    return to dataview without initiating a data dump, enter
    0 seconds when asked for length of download.

3.) While the data is being downloaded, it is also displayed on
    the screen. You should watch the data as it is dumped to 
    insure it looks logical. Occasionally, due to syncing between
    the computer and the altimeter, a bit will be dropped. This
    will cause all the data to look wildly in error....huge 
    numbers, negative numbers, something like that. At the end
    of the dump, Download asks if the data looks okay. Entering
    "n" (no) will cause download to slow down its timing and
    recycle to try again. If the data looks like garbage, enter
    no when asked if the data looks okay, turn the altimeter off,
    wait a few seconds for it to recycle, then turn it on again
    in the dump mode. Follow the screen instructions and Download
    will try again.
    
4.) A one line comment can now be entered to describe the flight.
    This comment may be useful to say things like all the motors
    didn't ignite, the boost wasn't vertical, great flight, etc.
    The comment can be entered while downloading using dataview
    download (see 2 above). Displaying the comment is done with 
    the display menu option - if the displayed file has a comment
    associated with it, COMMENT will be enabled, else it will be
    grayed out. Enter your comment carefully - commas NOT allowed.

5.) As a result of the comment line, the file formats are now 
    different. Dataview now uses .dtv as the file extension. All
    prior formats can also be read (.dat, .edt) however, dataview
    will only create .dtv extensions (see 6 below). I am planning
    on .dtv being the extension forever, so users should rename
    all their .dat and .edt files to .dtv. Then, you can associate
    .dtv files with dataview and have dataview auto-start when
    you double-click a .dtv filename.

6.) The Save As menu item now functions as a tradition Windows
    Save As - the original filename can be replaced or any new
    filename can be entered. So, once you edit those bad points
    out of your file, you can save it under the original filename.
 