<s>
The	O
Rockwell	B-Device
AIM-65	I-Device
computer	O
is	O
a	O
development	O
computer	O
introduced	O
in	O
1978	O
based	O
on	O
the	O
MOS	B-General_Concept
Technology	I-General_Concept
6502	I-General_Concept
microprocessor	O
.	O
</s>
<s>
The	O
AIM-65	B-Device
is	O
essentially	O
an	O
expanded	O
KIM-1	B-Device
computer	O
.	O
</s>
<s>
Available	O
software	O
included	O
a	O
line-oriented	O
machine	B-General_Concept
code	I-General_Concept
monitor	I-General_Concept
,	O
BASIC	B-Language
interpreter	O
,	O
assembler	B-Language
,	O
Pascal	B-Application
,	O
PL/65	O
,	O
and	O
FORTH	B-Application
development	O
system	O
.	O
</s>
<s>
Available	O
hardware	O
included	O
a	O
floppy	B-Device
disk	I-Device
controller	O
and	O
a	O
backplane	O
for	O
expansion	O
.	O
</s>
<s>
Rockwell	O
advertised	O
the	O
$375	O
AIM-65	B-Device
,	O
with	O
1K	O
RAM	B-Architecture
,	O
as	O
an	O
"	O
easy	O
,	O
inexpensive	O
 [ computer ] 	O
...	O
for	O
learning	O
,	O
designing	O
,	O
work	O
or	O
just	O
fun	O
"	O
.	O
</s>
<s>
Standard	O
software	O
included	O
the	O
system	O
console	O
monitor	O
software	O
in	O
ROM	B-Device
,	O
called	O
Advanced	O
Interactive	O
Monitor	O
.	O
</s>
<s>
It	O
featured	O
an	O
assembler	B-Language
,	O
disassembler	O
,	O
setting	O
and	O
viewing	O
memory	O
and	O
registers	O
,	O
starting	O
execution	O
of	O
other	O
programs	O
and	O
more	O
.	O
</s>
<s>
Single	O
stepping	O
was	O
made	O
possible	O
using	O
non-maskable	B-General_Concept
interrupt	I-General_Concept
(	O
NMI	O
)	O
.	O
</s>
<s>
This	O
made	O
it	O
possible	O
to	O
write	O
large	O
assembly	O
programs	O
using	O
the	O
two-pass	O
assembler	B-Language
ROM	B-Device
.	O
</s>
<s>
Source	O
code	O
in	O
text	O
was	O
written	O
twice	O
consecutively	O
to	O
the	O
input	O
tape	O
,	O
and	O
then	O
the	O
assembler	B-Language
,	O
which	O
could	O
start/stop	O
the	O
input	O
cassette	O
tape	O
using	O
motor	O
control	O
was	O
invoked	O
.	O
</s>
<s>
During	O
the	O
first	O
pass	O
the	O
symbol	O
table	O
was	O
built	O
and	O
stored	O
in	O
RAM	B-Architecture
.	O
</s>
<s>
Being	O
able	O
to	O
avoid	O
storing	O
code	O
in	O
RAM	B-Architecture
made	O
it	O
possible	O
to	O
save	O
much	O
space	O
.	O
</s>
<s>
It	O
was	O
however	O
,	O
still	O
important	O
to	O
keep	O
the	O
symbols	O
list	O
short	O
since	O
RAM	B-Architecture
size	O
was	O
often	O
no	O
more	O
than	O
4	O
KB	O
.	O
</s>
<s>
In	O
1981	O
,	O
Rockwell	O
introduced	O
an	O
improved	O
model	O
with	O
a	O
40	O
character	O
display	O
as	O
the	O
AIM-65/40	O
.	O
</s>
<s>
An	O
industrial	O
chassis	O
version	O
was	O
known	O
as	O
the	O
System	O
65	O
and	O
included	O
a	O
PROM	O
burner	O
and	O
floppy	B-Device
drives	I-Device
.	O
</s>
<s>
Micro	O
Technology	O
Unlimited	O
(	O
MTU	O
)	O
made	O
a	O
"	O
Visible	O
Memory	O
"	O
card	O
in	O
1978	O
that	O
worked	O
with	O
the	O
KIM-1	B-Device
and	O
AIM-65	B-Device
computers	O
,	O
providing	O
raster	B-Algorithm
graphics	I-Algorithm
display	O
capability	O
.	O
</s>
<s>
MTU	O
also	O
made	O
the	O
first	O
real	O
time	O
music	O
synthesizer	O
for	O
a	O
microcomputer	O
;	O
it	O
worked	O
with	O
the	O
KIM-1	B-Device
and	O
AIM-65	B-Device
,	O
and	O
featured	O
a	O
DAC	O
with	O
software	O
providing	O
4	O
voices	O
of	O
wavetable-lookup	O
synthesis	O
.	O
</s>
<s>
The	O
first	O
prototype	O
used	O
microcassetes	O
,	O
but	O
definitive	O
versions	O
have	O
two	O
8	B-Device
"	I-Device
floppy	B-Device
disk	I-Device
drives	I-Device
.	O
</s>
<s>
In	O
the	O
late	O
1970s	O
,	O
the	O
Rockwell	B-Device
AIM-65	I-Device
,	O
and	O
successor	O
System	O
65	O
became	O
the	O
first	O
computers	O
used	O
on	O
board	O
a	O
float	O
in	O
the	O
Tournament	O
of	O
Roses	O
Parade	O
.	O
</s>
<s>
In	O
2003	O
,	O
some	O
of	O
these	O
27-year-old	O
computers	O
were	O
still	O
in	O
use	O
controlling	O
various	O
displays	O
and	O
creatures	O
at	O
a	O
high	O
tech	O
Halloween	B-Application
show	O
near	O
Alexandria	O
,	O
Virginia	O
,	O
U.S.A.	O
</s>
<s>
stated	O
that	O
the	O
monitor	O
was	O
by	O
itself	O
almost	O
worth	O
the	O
price	O
of	O
the	O
AIM-65	B-Device
.	O
</s>
<s>
PL/65	O
was	O
a	O
programming	O
language	O
designed	O
and	O
implemented	O
by	O
Rockwell	O
International	O
for	O
the	O
AIM-65	B-Device
.	O
</s>
<s>
It	O
is	O
based	O
on	O
a	O
mix	O
of	O
ALGOL	B-Language
and	O
PL/I	B-Language
,	O
simplified	O
where	O
possible	O
in	O
order	O
to	O
adapt	O
to	O
the	O
limited	O
processing	O
environment	O
afforded	O
by	O
the	O
6502	B-General_Concept
(	O
64k	O
memory	O
for	O
instance	O
)	O
.	O
</s>
<s>
AIM-65	B-Device
can	O
be	O
emulated	O
using	O
MESS	B-Application
Emulator	I-Application
.	O
</s>
