The dot matrix for adraft-quality character is 8cells high and 11cells
wide. Figure C-1 shows the matrix with the car symbol filled in. Note that
there are no pairs of horizontally adjacent dots. The pins in the print head
cannot tire fast enough to print adjacent dots in the horizontal direction.
To the printer, adraft character is represented by 11 bytes of dot data,
one byte for each column. If you are working by hand, you can calculate
the data as shown in Figure C-1 and enter them via the zESC >“&” <0>
printer command. If you use the program in this appendix, proceed as
follows.
The program starts byasking whether you want to read characters from
an existing file. If you are going to add the car symbol to afile of download
characters you have already generated, answer yes; ifyou are going to create
anew file, answer no. The arrow on the screen toggles between Yes and
No when any key except Return is pressed. The Return key enters your
choice.
In the same way the program asks you to select Standard or IBM mode
and draft or near letter quality, then to confirm whether to continue or start
over. Continuing, on the next screen the program asks what character you
want to redefine, offering the exclamation mark (!)as asuggestion. If you
want to print the car symbol in place of the exclamation mark, press Return.
If you want to assign the car symbol to another character, press the key
of that character.
Next you must choose whether to make the car symbol an ascender
or adescender. This determines how the character is seated on the line:
Ascender CM: Descender CIM3
After you pressReturn for the ascender/descender choice,the cursor enters
the character box. You can movethe cursor with the numeric keypad. For
example, pressing the “6” key moves to the right; pressing the “3” key
movesdiagonally down to the right. The function keys control the setting
and clearing of dots. After F1 is pressed the cursor clears the dot in each
positionit is movedto. F3 causes the cursor to setdots. F2 allows thecursor
to pass overdots without either setting or clearing them.
In draft mode adot position is a2x2character block with the cursor
locatedin the upper left comer of the block. When adot is set, a2x3 block
of sharp signsis displayed,partly overlapping the dot position to the right.
Thisreflectsthe fact that the printer cannot print horizontally adjacent dots.
The program automaticallycensors adjacent dots.
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