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- HVIEW allows you to display the contents of a file on your Hercules (or
- compatible) monochrome graphics card. The program uses the very high
- graphics mode resolution of the card to give a 180 x 43 character display.
- Since very few files use all 180 columns, the screen is split vertically
- into two 90 x 43 panels. After one screenful is displayed, you can type
- Ctrl-break or Ctrl-C to stop the program or press any other key to continue
- displaying the file.
-
-
- There are two versions of HVIEW:
-
- HVIEW0 uses graphics page zero. Use this version if you also have
- a color card installed, since graphics page one and the color
- card both use the same memory space. When the program exits,
- the screen will be cluttered with apparent garbage. This is
- normal, believe it or not, and a simple CLS will clean up the
- screen.
-
- HVIEW1 uses graphics page one. This is the preferred version since the
- text page is preserved and will not conflict with the graphics
- display.
-
-
- The syntax for the command is
-
- HVIEWx <filename.typ
-
- where x is either 0 or 1 depending on which version you want to use
- and filename.typ is the file to be displayed. The file must be a standard
- ASCII file. IBM extended graphics characters are supported. If the
- "<filename.typ" is omitted, then keyboard input will be displayed on the
- graphics screen. (Note, however, that since keyboard input is buffered,
- what you type will not appear until you press Enter. Also, when you are
- dont diddling with the screen, type ctrl-Z to "close" the keyboard file,
- the press a key to return to the normal display.)
-
- The program doesn't try very hard to prevent nasty things from happening.
- If the lines of the input file are very long, they will display rather
- unappealingly when they wrap. Also, if you manage to exit the program
- without the text screen reappearing (you can tell if this has happened if,
- when you type DIR <enter>, the drive light goes on. If you are using
- HVIEW0, the screen will change in weird ways, too) the simplest way to get
- back to the text screen is to type
-
- HVIEWx (replace x with either 0 or 1)
- <ctrl-z> <Enter>
- <Enter>
-
- And the text screen should be back.
-
- Also supplied are the following:
-
- HVIEW.ASM : Source code in CHASM format.
-
- BIT8.BAS : A BASIC program that lets you redesign the characters, if you
- really dislike the ones that I made.
-
- BIT8.PAT : the bit patterns for the various characters. It is a BLOAD-type
- file (i.e. it has the annoying 7-byte header). If you recompile
- HVIEWx, you must tack this file onto the end of HVIEWx.COM via
- DEBUG. Remember to remove the 7-byte header. Otherwise, your
- characters will look funny.
-
-
- Enjoy! Raymond J Chen 24 Aug 86