GRDUMP.THD  --- Copyright 1988 by Phil Wheeler

An original compilation of Compuserve Model 100 Forum messages for use by
Forum members only.

This is a short thread of captured messages, on the identification and
solution to problems with the GRaphics DUMP program GRDUMP for the Tandy
200.

Message range: 168098 to 168208
Dates: 4/25/88 to 4/27/88


Sb: #GRDUMP
Fm: Curtis Karnow 73047,3120
To:  73327,1653 

Got GRDUMP from dl10. Very nice. But on my epsom printer this program insists
of skipping lines so that screen dump doesn't fit together i.e. there's 'white
lines' between each line of output. Even when I run a little program that makes
sure (with any program, including TEXT) that lines will touch vertically. What
to do? Any other vreader of this message with suggestions for good screen dump
programs for the 200-- so Ican dump bar charts, pie charts, etc--?


Fm: Tony Anderson 76703,4062
To: Curtis Karnow 73047,3120

The problem you are experiencing with the Epson printer is due to the default
setting of 6 lines per inch, and the fact that your printer is only using 8 of
the 9 pins in the printhead.  Setting your line spacing to 8 lines per inch may
help, since that will cover up the "white line" where the 9th pin should strike
but doesn't.

See your printer manual, it probably has a lot of space devoted to graphics
displays; I have two Epson's and both of the manuals devote over 50% to graphic
control and display.  In the appendix, you'l find printer control codes that
will change the line spacing to whatever you want/need.


Fm: James Yi 73327,1653
To: Curtis Karnow 73047,3120

The line spacing has to be smaller, and to do that, modify DATA line 9100.
Try substituting the 15th data item, 24, in line 9100 with a smaller value,
like 21 or 18, etc.


Fm: Curtis Karnow 73047,3120
To: James Yi 73327,1653

Thanks to both Tony A. and James Li, the following modifications create good
pie and bar charts on my Epson LX-80: just before  LOADM'ing the dump program,
i set line spacing to 8lines per inch; i modify the dump program as Li
suggests, using the value "11" instead of 24 in line 9100, then after the
machine program runs, I reset the printer with one line, (ESC @). Anyone who
wants more detail, just ask. The point is that line spacing and resetting the
printer can all be done within in the confines of the program calling the dump
routine.