titus-larsen-titus-1981-apple-interfacing

age caused by careless or incorrect wiring of a test circuit. Once a
circuit has been completely tested and debugged, you can probably
connect it directly to the data bus of the Apple without any problem.
Breadb@aird C@nstrrYdi@rt1
The breadboard circuits may be constructed using wire-wrap techniques,
as shown in Fig. 5-9. In this case, the circuits could be expanded
and modified through simple wiring changes, but the breadboard
itself would be somewhat difficult to use.
To aid in interface construction and testing, a printed circuit has
been developed in which all of the necessary circuitry has been
placed on a single board. The power supply and logic probe circuitry
have been incorporated to make the breadboard easy to use. The
breadboard is shown in Fig. 5-10, and is available in kit or assembled
form from Group Technology, P.O. Box 87B, Check, VA 24072. A
large space has been left unused on the breadboard so that a solderless
breadboard socket may be mounted directly on the printed-circuit
board for easy experimentation. Typical breadboard sockets are
the "SK-10" from E & L Instruments, Derby CT 06418 and the "Super
Strip" from AP Products, Inc., Mentor, OH 44000. A complete list of
parts needed for the breadboard, along with the printed-circuit board
artwork is provided in the Appendix.
Since the interface breadboard uses a 40-conductor cable to connect
to various computers, you will need a means of connecting the