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Power Programmierung
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Power-Programmierung CD 2 (Tewi)(1994).iso
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1988-02-01
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Non-obvious capabilities of PC-Hypertext
========================================
PC-Hypertext includes a number of features that may not be intuitively
obvious to even the most experienced computer user. For example:
Network files While the Main menu display always appears as a
============= hierarchy, it's a true network as it support loops,
super-sets, and dual-path browsing. However, to keep
users from being confused, PC-Hypertext displays only a
hierarchical view as it remembers the paths selected
that lead into the network then retraces that path back
out when the LEFT arrow or DEL keys are pressed.
This approach is similar to unrolling string while
exploring underground caves to prevent disorientation.
DOS/Program calls With such calls, PC-Hypertext saves needed location
================= variables and then exits from memory. This leaves completely free system for use by the called programs
all of memory free for the called program. When
finished with the called program, PC-Hypertext
automatically reloads itself and returns to display
prior to the exit.
Construction The ease of modifying cross-reference links in
============= PC-Hypertext may wrongfully lead users to think that is
how hypertext systems are built. Hypertext construction
depends mostly on the classification and categorization
of large numbers of files and cross-links from many
different dimensions.
Hypertext construction is taking information apart, then
making it easy for users to quickly reassemble the needed
information from whatever viewpoint they desire.
PC-Hypertext aids only portions of this construction
process.
Information PC-Hypertext contains security system to aid developers
Validation and users. For developers, the primary value they add
========== is in identifying ideas and creating the network of
paths that lead to each idea. While both MaxThink and
Houdini create such networks, our HYPERLINK program
contains programs (M2H and H2H) that translate such files
into the binary network files used by PC-Hypertext.
In addition, when the PC-Hypertext program loads, it
checks the system to insure the intended files are
available. Finally, developers can set the system to
notify users if any of the contained files have been
modified. Together, these systems help protect the
interests of the hypertext developer.
With high-value information, users also need some
guarantee that the information has not been accidentally
or purposely modified from the intended formats.
While any security system can be thwarted, the mentioned
PC-Hypertext approach should satisfy the interests of
both creators and users of hypertext knowledge.
Auto subdirectory While MS-DOS allows 64,000 files per directory, file
================= access speed becomes unworkable above 200 files per
directory. So, with any file access, PC-Hypertext first
looks for the requested file in a directory consisting
of the first three letters of the filename. If that
directory does not exist, then the program searches the
current directory for the requested file. This approach
lets developers create flat or hierarchical file systems.
Audio/visual The ALT-K command, which builds or plays back a log of
Demonstration keystrokes, includes an unusual feature. The program
============= records both the keystrokes and the delays between each
keystroke. Here's the reason why.
I can make audio tapes (cassette format) containing
instructions for use of PC-Hypertext such that during
the playback, both the audio tape and visual actions
on the computer screen are in sync. Neat!
Neil Larson 1/16/88 GUIDE5
44 Rincon Rd., Kensington, CA 94707
Copyright MaxThink 1988 -- Call 415-428-0104 for permission to reprint