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1989-02-07
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10KB
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237 lines
+----------------------------------------------------------------------------+
| |
| Y.A.M.P -- Yet Another Mac Program -- Version 2.1 |
| Copyright (C) 1988 Galaxy Systems Corporation |
| All Commercial Rights Reserved |
| |
+----------------------------------------------------------------------------+
This program may be freely distributed on a
noncommercial basis only. For any business use,
the program must be licensed from Galaxy Systems
Corporation, Box 26387, Richmond, VA 23260-6387.
* NOTICE * Galaxy Systems Corporation assumes no
liability for any damages, direct, indirect or
consequential, which may arise out of the use of
this product or inability to use this product.
No warranty, express or implied, including the
warranties of merchantibility and fitness for a
particular purpose, is offered.
+----------------------------+
| |
| The YAMP ReadMAC Viewer: |
| ======================== |
| |
+----------------------------+
The YAMP program ("Yet Another MAC Program") is a ReadMAC viewer which
has been painstakingly optimized for the display of ReadMACs on CGA
monitors.
Also, it has been coded so as to be able to load most any file that
refers to itself as a ReadMAC. Some ReadMAC viewers are sensitive to
information in the header of the .MAC file and will fail to display
the image properly or at all. YAMP has been coded for the utmost
flexibility in this regard.
Further, the "Smart" half-vertical size mode (see later) has 5 different
contrast settings. The double-wide mode (see later) is a TRUE double-wide
mode, not just a pixel-duplication double-wide mode. It is the BEST
double-wide mode I have seen to date.
Also, there are no size or panning limitations in the double-wide modes.
The full image is always available.
Page 1
Using YAMP:
===========
There are two stages in the use of the YAMP program. First, you must
select a ReadMAC file to view, and then you select one or more viewing
options.
After the YAMP title screen appears and you press a key, the current
directory of *.MAC files is displayed on the screen. At this point,
you can either give another ambiguous file specification or key in the
name of a file to view. If you omit the extension, .MAC is assumed.
For example, for a file spec, you could enter
*.MAC
A:\DIR\*.pic
d: (*.MAC assumed)
abc\def\*.*
\ghi (*.MAC assumed)
Once you have selected a file, it will be brought up in "Normal" mode.
In this mode, the image will appear elongated, because of the difference
in the aspect ratios between the IBM CGA display and the Apple Macintosh
display.
And while viewing a file, F1 or F8 bring up a help menu. F1 was the
original key used by YAMP; F8 was added to be consistent with the
REPP310 Printer Art Conversion Package, in which the YAMP viewer is
also included.
Once you are viewing a file, a number of display-modificaton options
become available. Most are selected with single keystrokes. If an
option is selected with a letter, both upper and lower-case versions
of the letter will work identically.
The options are as follows:
. You can scroll the image with the Arrow Keys and PgUp and PgDn.
. The Home key brings you to the top of the image, and the
End key puts you at the bottom of the image.
. Ctrl-Left Arrow aligns you with the left edge of the image, and
Ctrl-Right Arrow aligns you with the right edge of the image
(especially useful in the double-wide modes).
. "V" toggles between 1/2-vertical & normal modes. Because of the
number of vertical scan lines on the CGA display (200) as opposed
to the number of lines on the Macintosh (350 or so), the image on
the CGA will appear elongated. Cutting the image in half restores
the aspect ratio but loses you some detail.
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. "H" toggles between enhanced-dbl-wide & normal modes. Another way
to get around the elongation problem is to make the ReadMAC image
twice as wide on the CGA screen. This means you will now have to
scroll sideways to view the entire image, but you will not lose
any detail. However, the image may appear grainy. This enhanced
double-wide mode has been set up to reduce the graininess where
possible. See also the next option.
. "T" toggles between original-dbl-wide & normal modes. "T" is the
original way in which most ReadMAC viewers created a double-wide
mode. It is still useful with the UTIL Menu colorization options
of the REPP310 package and so has been included here.
. "S" begins a sequence of 1/2-vertical "Smart" modes. Keying "S"
again & again toggles between 5 contrast settings. These modes
are similar to the "V" mode but use extra algorithms to enhance
the image. You get out of the "S"mart modes by choosing another
mode, such as "H", "V", "P" (see below), or "N" (for normal mode).
. "P" begins a sequence of 1/2-vertical Palette-1 colorizations.
Pressing "P" again & again toggles between 5 contrast settings.
"P" modes function like the "S" modes above. Again, get out the
"P" modes by choosing another mode (H,V,N,S).
. "I" simply inverts the image top-to-bottom.
. "M" mirrors the image. (Inverts left-to-right.)
. "L" toggles between Landscape and Portrait views of the image.
The Portrait (or vertical) view is the normal view. The Landscape
(or horizontal) view is created by this option the first time
this option is selected for a particular image. Thereafter, access
to the Landscape view of an image is practically instantaneous.
Note that the Portrait and Landscape views of an image are
independent images. That means you can manipulate one image
without affecting the other, and when you toggle between the
images, you will always return to where you left off with an
image, and return to the display mode in which you were with
that image.
. "D" just reDisplays the current screen. This is useful after the
display of the help screen.
. "Z" applies a smoothing algorithm to the image. Sometimes, after
the creation of a Landscape version of a ReadMAC, a "striping"
or "lined-up" effect will appear. Smoothing will get rid of this,
but we suggest trying the "S"mart modes on the image first.
This is because the "Z" function actually changes the image
in memory, and if you have both Portrait and Landscape views,
it changes them BOTH. There are some exiguous technical reasons
for this, which we will omit here. See also the next option.
Extra note: The smoothing routine (Z) turns out to be asymmetric
in its effect on the "S"mart and "P"alette modes. This means that
after "smoothing" or colorizing, the "S"mart and "P"alette modes may
differ in their effect on an image that has been mirrored from one
that has not been mirrored. Try it and see.
Page 3
. "R" reloads the image from disk. If, after a smoothing function
(the only function that actually modifies the image), you decide
you would like the original image back, just press "R". If you
are using YAMP from within the REPP310 package, this keeps
you from having to return to the REPP or UTIL menu screen to
request a reload of the ReadMAC file.
. RETURN (ENTER) or ESC get you out of YAMP and return you to the
files display.
. "Ins" and "Del" are the "BOSS" keys for the YAMP viewer. They
are active only while you are viewing an image. If you press
these keys, they will show a normal screen on an apparently
"hung" system. No keystrokes will appear to work (besides Ctrl-
Alt-Del, of course). "See boss, the machine appears to be
hung. I press keys and nothing happens!" To get out of the
BOSS screens (there are two available) either press Ctrl-Home
or (if your Boss is watching) re-boot with Ctrl-Alt-Del.
If your Boss comes around WHILE you are VIEWING THE FILE
DIRECTORY, just press RETURN twice.
A note on REPP310:
==================
YAMP is included within the REPP310 Printer Art Conversion Package.
This package is available from PC-SIG on their Printer Art disk #154.
This package is able to convert old-style printer art text files into
displayable graphics. The package has a number of options and
capabilities, including the ability to be used as a general text-file
scrubber. For some reason, using REPP to play around with the old
text file pictures is kind of fun, and the disk is very popular.
NOTE: The REPP310 version of the PC-SIG Printer Art disk is expected
to be available March 15, 1989. The current version of REPP, REPP288,
does not have YAMP incorporated.
--- End of Document ---
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