jep@oink.UUCP (James E. Prior) (03/04/91)
I hacked a patch into the screen print program that prints a copy of the
screen pixel by pixel. The patch corrects the line spacing.
As the screen printing is done in graphics mode, the line feeds need to
advance the paper 8/72" instead of the normal 1/6". As distributed,
the sprint program does this too late. It doesn't change the line
spacing until _after_ the graphics printing. This causes the first
screen print to have horizontal gaps, and subsequent text printing to
be scrunched vertically.
My hack implements the 8/72" line spacing at the beginning of the
graphics printing, and set the line spacing to 1/6" after the screen
print.
I changed four bytes in the /usr/bin/sprint program. What follows are
a single line of the hex dump of the new and old version, so that you
can patch your own sprint.
-rwxr-xr-x 1 bin bin 9764 Mar 3 13:46 /usr/bin/sprint*
00002180 1B 4C D0 02 00 00 1B 41 08 1B 32 00 1B 33 24 00 >.LP....A..2..3$.<
address data in hex ^^ ^^ ^^ ^^ data in ASCII
^^ ^^ ^^ ^^
-rwxr-xr-x 1 bin bin 9764 Jan 1 1970 /usr/bin/sprint.virgin*
00002180 1B 4C D0 02 00 00 1B 41 08 0D 00 00 1B 32 0D 00 >.LP....A.....2..<
Caveats:
This patch works for by Okidata Microline 182i which is _supposed_ to be able
to emulate Epson printers. I have not tested the patch on an actual Epson
printer. It might be the case that the original sprint works fine on real
Epson printers. If screen prints work on your machine, then don't mess
with this patch. In other words, if it ain't broke don't fix it.
I'm using version 3.51 of the operating system. You version of sprint may
differ. You may want to run the following sum commands and compare the
output to the version of sprint that you have. If your sums are different,
then my patch might not apply.
sum /usr/bin/sprint*
51694 10 /usr/bin/sprint
51606 10 /usr/bin/sprint.virgin
sum -r /usr/bin/sprint*
42291 10 /usr/bin/sprint
19696 10 /usr/bin/sprint.virgin
--
Jim Prior jep@oink osu-cis!n8emr!oink!jep N8KSM