<s>
The	O
Micro-Professor	B-Device
MPF-I	I-Device
,	O
introduced	O
in	O
1981	O
by	O
Multitech	O
(	O
which	O
,	O
in	O
1987	O
,	O
changed	O
its	O
name	O
to	O
Acer	O
)	O
,	O
was	O
the	O
first	O
branded	O
computer	O
product	O
from	O
Multitech	O
and	O
probably	O
one	O
of	O
the	O
world	O
's	O
longest	O
selling	O
computers	O
.	O
</s>
<s>
The	O
MPF-I	O
,	O
specifically	O
designed	O
to	O
teach	O
the	O
fundamentals	O
of	O
machine	B-Language
code	I-Language
and	O
assembly	B-Language
language	I-Language
,	O
is	O
a	O
simple	O
and	O
easy	O
to	O
use	O
training	O
system	O
for	O
the	O
Zilog	B-General_Concept
Z80	I-General_Concept
microprocessor	B-Architecture
.	O
</s>
<s>
The	O
MPF-I	O
does	O
not	O
look	O
like	O
a	O
typical	O
Microcomputer	B-Architecture
.	O
</s>
<s>
It	O
is	O
enclosed	O
in	O
a	O
vacuum	O
formed	O
plastic	O
book	O
case	O
often	O
used	O
to	O
store	O
a	O
copy	O
of	O
a	O
language	O
textbook	O
,	O
two	O
audio	B-Device
cassettes	I-Device
,	O
and	O
a	O
training	O
manual	O
.	O
</s>
<s>
Programs	O
are	O
entered	O
into	O
the	O
MPF-I	O
using	O
Z80	B-General_Concept
machine	B-Language
code	I-Language
in	O
hexadecimal	O
format	O
.	O
</s>
<s>
The	O
MPF-I	O
monitor	B-General_Concept
program	I-General_Concept
displays	O
both	O
an	O
address	O
and	O
data	O
stored	O
at	O
that	O
address	O
simultaneously	O
using	O
a	O
seven-segment	B-General_Concept
display	I-General_Concept
.	O
</s>
<s>
There	O
is	O
a	O
spare	O
DIP	B-Algorithm
socket	O
for	O
adding	O
additional	O
ROM	B-Device
or	O
RAM	B-Architecture
to	O
the	O
MPF-I	O
.	O
</s>
<s>
There	O
are	O
also	O
two	O
3.5mm	B-Device
audio	I-Device
jacks	I-Device
on	O
the	O
top	O
right	O
of	O
the	O
computer	O
,	O
these	O
are	O
to	O
communicate	O
with	O
the	O
audio	B-Device
cassettes	I-Device
that	O
are	O
used	O
to	O
store	O
programs	O
and	O
code	O
typed	O
into	O
the	O
machine	O
.	O
</s>
<s>
One	O
is	O
used	O
to	O
read	O
the	O
drive	O
and	O
the	O
other	O
is	O
used	O
to	O
write	O
data	O
;	O
on	O
a	O
conventional	O
audio	B-Device
cassette	I-Device
deck	O
the	O
wires	O
would	O
be	O
connected	O
to	O
the	O
headphone	O
and	O
microphone	O
ports	O
.	O
</s>
<s>
This	O
type	O
of	O
data	O
storage	O
is	O
similar	O
to	O
that	O
of	O
a	O
Radio	B-Device
Shack	I-Device
TRS-80	I-Device
or	O
the	O
Sinclair	O
ZX-81	O
,	O
which	O
similarly	O
used	O
audio	B-Device
cassettes	I-Device
to	O
store	O
programs	O
the	O
user	O
typed	O
,	O
as	O
well	O
as	O
commercial	O
programs	O
and	O
games	O
the	O
user	O
could	O
buy	O
.	O
</s>
<s>
The	O
Monitor	O
and	O
Basic	O
fitted	O
into	O
one	O
4	O
kByte	O
ROM	B-Device
,	O
replacing	O
the	O
2	O
kByte	O
monitor-only	O
ROM	B-Device
.	O
</s>
<s>
It	O
had	O
the	O
same	O
expansion	O
connector	O
as	O
the	O
MPF-1	O
(	O
strictly	O
a	O
Z80-CPU	O
pin-header	O
)	O
,	O
so	O
several	O
of	O
the	O
MPF-1	O
expansion	O
boards	O
could	O
be	O
used	O
on	O
the	O
MPF-1P	O
.	O
</s>
<s>
It	O
was	O
more	O
a	O
Basic	O
computer	O
than	O
the	O
MPF-1	O
,	O
with	O
an	O
assembler	B-Language
and	O
disassembler	O
as	O
part	O
of	O
the	O
firmware	B-Application
(	O
8Kbyte	O
)	O
.	O
</s>
<s>
The	O
MPF-1P	O
featured	O
4	O
kByte	O
static	O
RAM	B-Architecture
,	O
with	O
optional	O
battery	O
backup	O
.	O
</s>
<s>
On	O
24	O
February	O
1993	O
,	O
Flite	O
Electronics	O
International	O
Limited	O
in	O
Southampton	O
,	O
England	O
,	O
at	O
that	O
time	O
an	O
international	O
distributor	O
for	O
Acer	O
,	O
purchased	O
the	O
copyright	O
to	O
the	O
MPF-I	O
'	O
s	O
training	O
manuals	O
,	O
as	O
well	O
as	O
its	O
firmware	B-Application
and	O
hardware	O
intellectual	O
property	O
rights	O
from	O
Acer	O
.	O
</s>
