<s>
geoRAM	B-General_Concept
from	O
Berkeley	O
Softworks	O
was	O
a	O
memory	O
expansion	O
peripheral	O
for	O
use	O
on	O
the	O
Commodore	O
64	O
computer	O
with	O
GEOS	B-Device
operating	B-General_Concept
system	I-General_Concept
.	O
</s>
<s>
geoRAM	B-General_Concept
was	O
created	O
by	O
Dave	O
Durran	O
.	O
</s>
<s>
During	O
the	O
chip	O
shortages	O
of	O
the	O
1980s	O
,	O
Commodore	O
could	O
not	O
produce	O
enough	O
of	O
its	O
RAM	B-General_Concept
Expansion	I-General_Concept
Units	I-General_Concept
(	O
they	O
eventually	O
cancelled	O
them	O
)	O
.	O
</s>
<s>
The	O
GEOS	B-Device
operating	B-General_Concept
system	I-General_Concept
relied	O
heavily	O
on	O
extra	O
RAM	O
and	O
so	O
the	O
company	O
behind	O
GEOS	B-Device
produced	O
their	O
own	O
memory	O
expansion	O
cartridge	O
,	O
called	O
the	O
geoRAM	B-General_Concept
.	O
</s>
<s>
By	O
using	O
a	O
mapped-in	B-General_Concept
page	I-General_Concept
scheme	O
,	O
RAM	O
contents	O
on	O
the	O
cartridge	O
are	O
directly	O
accessible	O
by	O
the	O
CPU	O
,	O
and	O
do	O
n't	O
rely	O
on	O
DMA	B-General_Concept
like	O
the	O
REU	O
cartridges	O
,	O
which	O
enable	O
memory	O
transfers	O
between	O
system	O
RAM	O
and	O
REU	O
much	O
faster	O
than	O
the	O
system	O
CPU	O
can	O
do	O
.	O
</s>
<s>
Hence	O
,	O
there	O
's	O
no	O
other	O
benefit	O
than	O
extra	O
RAM	O
,	O
and	O
not	O
much	O
software	O
other	O
than	O
GEOS	B-Device
actually	O
supported	O
it	O
.	O
</s>
