00 20 40
60
80
AO
CO
EO
2827-8
Fig.
2-6. The MicroLab
!
Display
Organization.
The MicroLab
|
display
is
organized
into
eight
digits,
numbered
from
left
to
right.
Now,
if
your program
writes
B1
to
8085 Personality
Card
1/O port
0080,
an
H
will
appear
on
digit number
5,
and
will
remain
there
until you
change
it.
Table
2-4
lists
all
the characters
you can display on
the
MicroLab
|
readout,
with
their
corresponding hexadecimal
values.
Table 2-4
MicroLab
|
Display
Characters
Value
00
01
02
03
04
05
06
o7
08
09
OA
OB
oc
oD
OE
OF
blank
10
11
12
13
14
15
16
17
ols
5<
MAQNQTPOBYIAMAWN=
a
=
S=U05
F
Operator
Familiarization—MicroLab
|
Instruction
Table
2-4
(cont.)
play
Value
:
18
=
19
J
1A
-
1B
1¢
1D
?
1E
blank
1F
voc
Relocating
a
Block
Of
RAM
You
can
use
commands
from
the
front
panel
to
relocate
a
1K-byte
segment
of
MicroLab
|
RAM
to
a
new
beginning
(base) address.
Suppose
that
a program required
a
1K-byte
segment
of
RAM
be
available
starting
at
address
FCOO.
All
you
need
to
do
is
press
(SHIFT)
RELOC,
and
enter
the new
base address.
NOTE
If you try to
enter an
address
that
is
not a multiple of
1K,
the
MicroLab! monitor
will
automatically re-
position the
RAM to
the next
lower segment.
As an exercise,
press
the
following keys
1. (SHIFT)
RELOC.
The
display
will
show
"rEL
XXXX”".
The
XXXX
address
is
the
value your personality card
will
automatically move
the
RAM
to
at
power
up
or
reset
For
the 8085
Personality
Card,
the initialization
address
is
3COO.
It
may
be different
for
the
personality
card you're
using, so check
in
the
personality card
Instruction
Manual
supplement.
2.
Enter
FCOO.
As
you
enter each
digit,
that
value
will
be
echoed
onto
the
display.
When
the
last
digit
is
entered,
the
display
will
blank,
and then
say
“rEAdY”.
3.
Now
press
(SH/FT)
RELOC
again.
The display should
show
you
the
new base
address
for
the
relocatable
RAM.
4.
To
escape
from
the
RELOC
command without
changing
the
base address, press
SHIFT
again.
The
display
will
show
"rEAdY”.
If
the
MicroLab
|
is
shut
off,
or
the
RESET
key
is
pressed,
the
relocatable
RAM
will
automatically be
moved
to
the
lowest
base
address
possible.
If
an
address
is
entered
that
falls
into
the
restricted
catagory (operating system
PROM
space,
for
example),
the
MicroLab
|
will
display an error
message.
2-11
Summary of Contents for 067-0892-00
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