Gemini Industries Printer

Gem/n/ User’s Manual

In our example, we want to start printing in,dot column 100,

and print to column 114. Therefore, the total number of characters

we will send for each of the two rows is 114. Using our handy table,

we know that nl = 114 and n2 = 0. Therefore, the control code

we send to Gemini to put the printer in the low-resolution mode,

ready to print our 14 columns, is as follows:

LPRlNT CHR$(27); “K”; CHR!$(114); CHR$(O); -

Before you start firing the pins, be sure that the top of the

second row of dots is onedot’s space below the bottom of the first

row. (It’s like having one picture in two frames and wanting the

frames lined up close together.) You are using seven printing dots,

and each dot is l/72 of an inch below the one above it. Perhaps

this illustration will make it clearer.

0 -

6 -

First line l -

7 7-dot space for llne height -

Secondllne l -

1 -

0 -

2 .-

0 -

etc.

Our line feed spacing should be 7172 inch. We have a special

line-feed command for precisely that spacing:

ESC “1” or, CHR$(27) CHR$(49)

Now, it’s just a matter of entering the program.