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FRIENDLY TEXT LINES OF THE SKETCH TO THE MACHINE CODE RECOGNIZED BY THE
MICROCONTROLLER.  THE COMPILER LINKS LIBRARIES, SUCH AS PS2KEYBOARD.H,
REFERENCED BY THE SKETCH.  THE HARDWARE  MY FINAL PORTABLE VERSION OF THE
PORTABLE KEYBOARD INTERFACE USES THE ARDUINO PRO MINI MICROCONTROLLER
PLATFORM, WHICH OPERATES AT 5 V.  THE PORTABLE KEYBOARD INTERFACE IS
DESIGNED TO WORK WITH PS2 AND USB1 KEYBOARDS THAT OPERATE FROM 5 V.
PROGRAMMING THE PRO MINI  YOU WILL FIND IT MOST CONVENIENT TO LOAD THE
SKETCH BEFORE THE PRO MINI PLATFORM IS WIRED INTO THE PROJECT ENCLOSURE AND
CONNECTIONS ARE MADE TO THE CIRCUIT BOARD CONTAINING THE OPTOISOLATORS.
PREPARE THE ARDUINO PRO MINI MICROCONTROLLER PLATFORM FOR PROGRAMMING BY
SOLDERING A ROW OF SIX HEADER PINS ALONG THE EDGE OF THE PRO MINI PLATFORM,
LABELED BLK, GND, VCC, RXI, TXO, GRN.  THESE PINS WILL BE USED AS THE
TEMPORARY INTERFACE BETWEEN THE PRO MINI AND THE FTDI 5 V BASIC BREAKOUT
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