General
Information—MicroLab
|
Instruction
Display
Expansion
RS-232-C
Cassette
Connector
Ports
Port
MicroLab
|
Operating
System
PROM
Common
Bus
Microprocessor
/
Microcomputer
Personality Card
2827-2
Fig.
1-1.
MicroLab
|
And
Personality Card
Block
Diagram.
The MicroLab
|
and personality card share
a
common bus,
and are interdependent
for
operation.
NOTE
The
circuitry
on
the
personality
card
is
microprocessor dependent.
That
is,
an
8085 per-
sonality
card won't contain
the
same
logic
as
an
1802
personality
card.
The
personality card description
given in
the
first two
sections
of
this
manual
is
generalized, except
where
a specific
example
is
given.
The
personality card supplements located
in
Sections
3
and
11
of
this
manual
give
specific
information
for
each
card.
MicroLab
|/Personality
Card
Communication
Note
in
Fig.
1-2
that the
MicroLab
|
andthe
personality card
are
connected
by
a bus.
This
bus
carries the
address,
data,
and
control information
between
the
two
circuit
boards.
For
example,
if
a
key is
depressed
on
the
MicroLab
I
keypad,
the
keypad/display encoder converts the
key
press
to digital
information
and places the
information on
the
MicroLab
|
REV
A
JUN 1980
internal
bus.
The
bus transfers the
information
to
the
personality card.
On
the
personality card, decoding
logic
converts the
information
to
a
form
that
can
be
understood
by
the
microprocessor. The microprocessor
is
under control
of
the
MicroLab!
monitor (usually located on
the
personality
card)
and reacts
to
the
information according
to
monitor
instructions.
The MicroLab
|
Monitor
The MicroLab
|
operates
from
a
monitor
that
will
reside
either
in
PROM
on
the
personality
card,
or will
be
loaded
from
a
microprocessor
development
system
into
MicroLab|
RAM.
Where the
monitor
resides depends
on
the
personality
card
used.
The
monitor
is
primarily reponsible
for
responding
to
entries
made on
the
MicroLab
|
keypad,
and reacting
accordingly. We'll talk more
about
monitor
functions
later
in
Section
2.
1-3
Summary of Contents for 067-0892-00
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