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I
APPLE II PLUS I liE
The Interface Board
You need to acquire and install an Apple interface board (also call-
ed a "card") and a connecting cable. Your Gemini dealer can
answer any questions you have about the board or its installation
in slot number 1. Star Micronics, Inc. (the makers of Gemini), has
created the grafstar™ intelligent interface especially for your
Apple II Plus or Apple lie computers.
The Connecting Cable
Use the Apple, Centronics compatible, parallell/F cable, modified
to ground the 8th bit, or use a cable supplied by your Gemini
dealer.
Setting the DIP Switches
Because Apple uses a seven-bit interface, set DIP switch number
2-3 to the "on" position. Because BASIC supplies a line feed at
the end of each line, turn DIP switch number 2-4 to the "off" posi-
tion (unless you want to generate "double-spaced" output, in
which case turn number 2-4 "on"). Switch number 2-1 can be set
to either position.
Switch number 2-2 should be set to "off" if you want Gemini
to print every time it receives a CR code; set number 2-2 to "on"
if you wish to have the carriage return ignored and to print only
when the buffer is full.
The Use of Basic
In this manual, we used the BASIC programming language to il-
lustrate how to control the codes that manipulate Gemini's opera-
tions. In our sample programs, the CHR$ function is used to send
control codes to the printer. Unfortunately, this function is not sup-
ported by Apple Integer BASIC. However, with the aid of the follow-
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