<s>
The	O
Geneve	B-Device
9640	I-Device
is	O
an	O
enhanced	O
TI-99/4A	B-Device
clone	O
.	O
</s>
<s>
Released	O
in	O
1987	O
,	O
it	O
is	O
in	O
many	O
ways	O
similar	O
to	O
the	O
earlier	O
TI-99/8	O
,	O
which	O
was	O
in	O
prototype	O
form	O
in	O
early	O
1983	O
.	O
</s>
<s>
The	O
Geneve	B-Device
9640	I-Device
was	O
designed	O
by	O
Paul	O
Charlton	O
,	O
and	O
the	O
graphical	O
swan	O
on	O
the	O
boot	O
up	O
screen	O
was	O
designed	O
by	O
Mi-Kyung	O
Kim	O
.	O
</s>
<s>
The	O
Geneve	B-Device
9640	I-Device
features	O
a	O
16-bit	O
TMS9995	O
processor	O
clocked	O
at	O
12MHz	O
.	O
</s>
<s>
A	O
Yamaha	B-General_Concept
V9938	I-General_Concept
video	B-General_Concept
display	I-General_Concept
processor	I-General_Concept
(	O
the	O
same	O
one	O
used	O
in	O
the	O
MSX2	B-Operating_System
family	O
of	O
home	O
computers	O
)	O
provides	O
256	O
color	O
graphics	O
at	O
a	O
256	O
x	O
424	O
resolution	O
,	O
16	O
color	O
graphics	O
at	O
a	O
512	O
x	O
424	O
resolution	O
,	O
and	O
an	O
80	O
column	O
text	O
mode	O
.	O
</s>
<s>
Audio	O
is	O
produced	O
via	O
an	O
SN76496	B-Device
programmable	O
sound	O
generator	O
,	O
capable	O
of	O
producing	O
three	O
simultaneous	O
square	O
waves	O
at	O
sixteen	O
different	O
volume	O
levels	O
,	O
as	O
well	O
as	O
an	O
additional	O
noise	O
channel	O
that	O
could	O
produce	O
either	O
periodic	O
or	O
white	O
noise	O
in	O
three	O
different	O
frequencies	O
and	O
at	O
sixteen	O
different	O
volumes	O
.	O
</s>
<s>
An	O
IBM	B-Device
PC	I-Device
XT	I-Device
compatible	O
detached	O
keyboard	O
and	O
a	O
mouse	O
are	O
used	O
for	O
input	O
.	O
</s>
<s>
The	O
Geneve	B-Device
9640	I-Device
is	O
compatible	O
with	O
nearly	O
all	O
software	O
written	O
for	O
the	O
TI-99/4A	B-Device
.	O
</s>
<s>
In	O
1993	O
,	O
Beery	O
Miller	O
,	O
the	O
publisher	O
of	O
9640	O
News	O
,	O
organized	O
a	O
group	O
of	O
Geneve	B-Device
9640	I-Device
owners	O
and	O
was	O
able	O
to	O
purchase	O
all	O
rights	O
to	O
the	O
source	O
code	O
for	O
MDOS	B-Operating_System
,	O
Advanced	O
Basic	O
,	O
the	O
PSYSTEM	O
runtime	O
module	O
,	O
and	O
the	O
GPL	O
Interpreter	O
from	O
Myarc	O
and	O
Paul	O
Charlton	O
.	O
</s>
<s>
Over	O
the	O
years	O
,	O
MDOS	B-Operating_System
has	O
been	O
updated	O
by	O
individuals	O
including	O
Tim	O
Tesch	O
,	O
Clint	O
Pulley	O
,	O
Alan	O
Beard	O
,	O
John	O
Johnson	O
,	O
James	O
Schroeder	O
,	O
Mike	O
Maksimik	O
,	O
James	O
Uzzell	O
,	O
Tony	O
Knerr	O
,	O
Beery	O
Miller	O
,	O
and	O
others	O
.	O
</s>
<s>
Support	O
adding	O
SCSI	B-Architecture
,	O
IDE	B-Protocol
,	O
and	O
larger	O
ramdisks	B-Application
were	O
added	O
in	O
the	O
earlier	O
years	O
from	O
the	O
buyout	O
.	O
</s>
<s>
In	O
late	O
2020	O
and	O
early	O
2021	O
with	O
the	O
release	O
of	O
the	O
TIPI	O
for	O
the	O
TI-99/4A	B-Device
,	O
the	O
Geneve	O
was	O
interfaced	O
with	O
the	O
TIPI	O
and	O
a	O
Raspberry	B-Operating_System
PI	I-Operating_System
providing	O
TCP	B-Protocol
socket	I-Protocol
access	O
and	O
nearly	O
unlimited	O
high	O
speed	O
hard-drive	O
like	O
file	O
access	O
.	O
</s>
<s>
A	O
small	O
but	O
active	O
base	O
of	O
users	O
still	O
exist	O
on	O
www.Atariage.com	B-Application
as	O
of	O
2021	O
where	O
Tim	O
Tesch	O
,	O
Beery	O
Miller	O
,	O
and	O
others	O
provide	O
support	O
.	O
</s>
