Preface
We'd like to share a couple of important points before you get into this
book.
1.
This Book was written for the technical person, by a technical
person. It was not written to educate the average owner of a
TRS-80 Micro-computer. If you do not know what Hex
means.
..
or
how a NOR gate differs from a NAND
gate
...
you are not prepared to repair your Computer. (You
need some solid digital logictraining; and this Book won't give it
to you.)
If you are a technical person, but have never played around
with microprocessors, dive right in! A computer is nothing more
than a fast idiot. Don't let the "idiot" intimidate you. All of the
familiar logic is there; there just may be more of it than you're
used to seeing all
in
one place.
If you are a hobbyist who can convert Hex to Decimal
in
the
blink
of
an eye and you've entered 16K BASIC languages using
front panel switches, then this book will probably appear longer
than it needs to be. All the information you seek is here; you will
just have to turn more pages to find
it.
2. We've incorporated a lot of technical information that can lead
you right into the heart of the TRS-80 hardware. But we don't
wantyou to inferfrom this that we can make available engineer-
ing design services for your hardware/circuit ideas. We'd like
you to remember that any work you do on your TRS-80 "voids
the warranty". And, we will not obligate ourselves to repair or
correct owner-modifications.
So, once you open up the cabinet, you're on your own.
This book has been fun to write and we hope you have fun reading and
using it.
Mayall
your logic and software be glitch-free!
3
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