User manual
CHAPTER
1
INTRODUCTION
Congratulations
on
your
purchase
of a
KIM-4 motherboard.
You
will
now
be
able
to add
additional
memory
to
your
KIM
system,
as
well
as
EROM, ROM,
and
other system components
as
they
are
introduced
by MOS
Technology, Inc.
Because
the
KIM-4 motherboard
will
form
the
heart
of
your microcomputer
system, interconnecting
all of
your
other system components, please take
a
few
minutes
to
read this manual completely before attempting
to use
your KIM-4.
Chapter
2 of
this manual describes
how to
install
and
check
out
your KIM-4
motherboard. Chapter
3
contains schematics
and a
brief theory
of
operation,
Chapter
4
contains
your
warranty information
for
this module,
and
Appendix
A
describes
how to use the
direct memory access capability incorporated
in
the
motherboard. Appendix
B
contains
a
suggested power supply
for
supplying
current
to
your
KIM
system.
There
is one
important point
you
should understand before using your KIM-4
motherboard. Because
of the
high current involved
in
supplying power
to
multiple
expansion boards,
MOS
Technology, Inc.
has
designed your
KIM
system
so
that
you
may use a
single
unregulated
+8v
supply
for all the
cards which
you can
mount
in
your
KIM
motherboard.
Do not
attempt
to
power your
KIM
system through
a
regulated
+5v
supply. Each expansion module provided
for the KIM
system
will
contain
its
own +5v
regulator which
will
require
the +8v as
input.
A
regulator
is
provided
on
the
motherboard
to
feed regulated
+5v to
your
KIM-1 microcomputer module.
This regulator also works
off the +8v
which
you
supply
to the
motherboard.
If
you do not
have
a +8v
unregulated power supply,
refer
to
Appendix
B for a
schematic
for
such
a
unit.
Your
KIM-4 motherboard
has
been
carefully
designed
for
years
of
uninterrupted
service
to
you.
If, for any
reason,
the
unit should fail, follow
the
instructions
contained
in
Chapter
4 to
provide service
for
your module.
We
hope that
the
KIM-4
will
be a
powerful
and
useful addition
to
your
KIM
system.