<s>
BrMSX	B-Application
was	O
an	O
MSX	B-Operating_System
emulator	B-Application
for	O
DOS	B-Device
,	O
written	O
by	O
Ricardo	O
Bittencourt	O
.	O
</s>
<s>
It	O
was	O
first	O
released	O
in	O
1997	O
,	O
and	O
at	O
the	O
time	O
was	O
regarded	O
as	O
the	O
fastest	O
,	O
most	O
accurate	O
MSX	B-Operating_System
emulator	B-Application
.	O
</s>
<s>
In	O
1997	O
,	O
MSX	B-Operating_System
emulation	B-Application
was	O
still	O
preliminary	O
.	O
</s>
<s>
The	O
only	O
MSX	B-Operating_System
emulators	B-Application
available	O
were	O
fMSX	B-Device
and	O
CJS	O
MSX	B-Operating_System
.	O
</s>
<s>
Neither	O
were	O
very	O
accurate	O
at	O
the	O
time	O
,	O
nor	O
were	O
they	O
fast	O
enough	O
to	O
run	O
all	O
MSX	B-Operating_System
software	O
at	O
full	O
speed	O
,	O
on	O
computers	O
of	O
that	O
era	O
.	O
</s>
<s>
BrMSX	B-Application
aimed	O
to	O
solve	O
these	O
two	O
problems	O
.	O
</s>
<s>
In	O
order	O
to	O
improve	O
accuracy	O
,	O
the	O
Z80	B-General_Concept
core	O
was	O
tested	O
using	O
ZEXALL	O
,	O
emulating	B-Application
every	O
aspect	O
of	O
the	O
CPU	O
,	O
down	O
to	O
the	O
undocumented	O
flags	O
.	O
</s>
<s>
Fast	O
emulation	B-Application
was	O
achieved	O
by	O
coding	O
the	O
emulator	B-Application
entirely	O
in	O
Assembly	B-Language
,	O
and	O
by	O
using	O
a	O
number	O
of	O
hacks	O
,	O
the	O
most	O
successful	O
being	O
a	O
dirty	O
rectangles	O
implementation	O
known	O
as	O
the	O
video	O
cache	O
.	O
</s>
<s>
Development	O
of	O
BrMSX	B-Application
started	O
in	O
September	O
1997	O
,	O
and	O
the	O
first	O
public	O
release	O
was	O
in	O
November	O
of	O
the	O
same	O
year	O
.	O
</s>
<s>
The	O
name	O
itself	O
,	O
BrMSX	B-Application
has	O
a	O
double	O
meaning	O
.	O
</s>
<s>
The	O
logo	O
,	O
created	O
by	O
Raul	O
Tabajara	O
,	O
reflects	O
both	O
the	O
MSX	B-Operating_System
imagery	O
(	O
by	O
using	O
a	O
font	O
similar	O
to	O
the	O
logo	O
of	O
the	O
MSX	B-Operating_System
game	O
Aleste	B-Application
)	O
and	O
the	O
Brazilian	O
flag	O
(	O
by	O
using	O
the	O
round	O
shield	O
with	O
the	O
Brazilian	O
sky	O
)	O
.	O
</s>
<s>
The	O
mouse	O
icon	O
used	O
in	O
the	O
GUI	O
was	O
a	O
rendition	O
of	O
the	O
keyboard	O
of	O
Expert	O
(	O
one	O
of	O
the	O
Brazilian	O
MSX	B-Operating_System
models	O
)	O
.	O
</s>
<s>
Eventually	O
,	O
interest	O
in	O
BrMSX	B-Application
faded	O
,	O
as	O
fewer	O
people	O
used	O
DOS-compatible	O
systems	O
.	O
</s>
<s>
The	O
DOS	B-Device
version	O
stopped	O
at	O
Feb	O
of	O
2003	O
(	O
v2.10	O
)	O
.	O
</s>
<s>
A	O
number	O
of	O
features	O
now	O
common	O
in	O
MSX	B-Operating_System
emulation	B-Application
were	O
first	O
seen	O
in	O
BrMSX	B-Application
:	O
</s>
