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NECSCRN.DOC
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1983-06-24
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NECSCRN.DOC
Necscrn.com is a graphics and text screen dump program that
should be run ONCE after powering-up. It will attach itself to
the operating system, and then will operate by intercepting
Shift-PrtSc keystrokes and invoking the appropriate routine to
provide either a graphics or a text screen dump, depending upon
the current mode of the system, on an
************* NEC 8023A Dot Matrix Printer *********************
The graphics dump comes in two flavors, either a small (one dot
per pixel) or a large (4 dots per pixel, with the dot pattern
roughly corresponding to the color) format, depending upon
whether the left (large) or right (small) shift key is used.
For the small graphics dump, the aspect ratio is fairly accurate
when the printer is set for 10 characters per inch (the normal
power up default mode for the printer). The large graphics dump
prints out rotated 90 degrees on the paper, and the aspect ratio
won't be right (circles will look elliptical..) unless the
printer is set for 8.5 characters per inch. This is done by
selecting the 17 character per inch character set and enlarged
characters. A one line basic program that will do this is:
LPRINT CHR$(14);CHR$(27);"Q";
This program is a patched-up version of the GRAFTRAX.COM
program supplied on the Capital PC Users Group Diskette #5.
It will probably work with the C.Itoh ProWriter printers, since
they seem to differ from the NEC only in their packaging (and
in other minor details such as 20% faster printing, an improved
proportional character set, and a re-shuffling of the greek
alphabet to put it into (greek) alphabetical order). I would
appreciate hearing from anyone who knows how to modify the ROMs
on the NEC to incorporate any or all of these features.....
Rick Cunningham
2806 Grovemore Lane
Vienna, VA 22180