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Gemini User's Manual
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In our example, we want to start printing in dot column 100,
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and print to column 114. Therefore, the total numberof characters
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we will send for each of the two rows is 114. Using our handy table,
we know that n1
=
114 and n2
=
O. Therefore, the control code
we send to Gemini to put the printer in the low-resolution mode,
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ready to print our 14 columns, is as follows:
LPRINT CHR$(27);
10K";
CHR$(114); CHR$(O);
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Before you start firing the pins, be sure that the top of the
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second row of dots is one-dot's space below the bottom of the first
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row. (It's like having one picture in two frames and wanting the
frames lined up close together.) You are using seven printing dots,
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and each dot is 1/74 of an inch below the one above it. Perhaps
this illustration will make it clearer.
0
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1
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0
2
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0
3
0
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4
0
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5
0
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6
First line
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7
7·dot space for line height
Second line
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1
0
2
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0
etc.
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Our line feed spacing should be 7/72 inch. We have a special
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line-feed command for precisely that spacing:
ESC "1" or, CHR$(27) CHR$(49)
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Now, it's just a matter of entering the program.
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