<s>
QB64	B-Application
(	O
originally	O
QB32	B-Application
)	O
is	O
a	O
self-hosting	O
BASIC	O
compiler	O
for	O
Microsoft	B-Application
Windows	I-Application
,	O
Linux	B-Application
and	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
,	O
designed	O
to	O
be	O
compatible	O
with	O
Microsoft	B-Language
QBasic	I-Language
and	O
QuickBASIC	B-Language
.	O
</s>
<s>
QB64	B-Application
is	O
a	O
C++	B-Language
emitter	B-Application
,	O
which	O
is	O
integrated	O
with	O
a	O
C++	B-Language
compiler	O
to	O
provide	O
compilation	O
via	O
C++	B-Language
code	I-Language
and	O
GCC	B-Application
optimization	O
.	O
</s>
<s>
QB64	B-Application
implements	O
most	O
QBasic	B-Language
statements	O
,	O
and	O
can	O
run	O
many	O
QBasic	B-Language
programs	O
,	O
including	O
Microsoft	O
's	O
QBasic	B-Application
Gorillas	I-Application
and	O
Nibbles	B-Application
games	I-Application
.	O
</s>
<s>
Furthermore	O
,	O
QB64	B-Application
has	O
been	O
designed	O
to	O
contain	O
an	O
IDE	O
resembling	O
the	O
QBASIC	B-Language
IDE	O
.	O
</s>
<s>
QB64	B-Application
also	O
extends	O
the	O
QBASIC	B-Language
programming	I-Language
language	I-Language
to	O
include	O
64-bit	B-Device
data	O
types	O
,	O
as	O
well	O
as	O
better	O
sound	O
and	O
graphics	O
support	O
.	O
</s>
<s>
It	O
can	O
also	O
emulate	O
some	O
DOS/x86	O
specific	O
features	O
such	O
as	O
INT	B-Device
33h	O
mouse	O
access	O
,	O
and	O
multiple	O
timers	O
.	O
</s>
<s>
Since	O
version	O
2.0	O
,	O
QB64	B-Application
now	O
offers	O
debugging	O
abilities	O
,	O
with	O
the	O
new	O
$DEBUG	O
metacommand	O
.	O
</s>
<s>
QB64	B-Application
was	O
originally	O
compiled	O
with	O
QuickBASIC	B-Language
4.5	O
.	O
</s>
<s>
After	O
significant	O
development	O
,	O
Rob	O
Galleon	O
,	O
the	O
developer	O
,	O
became	O
hindered	O
by	O
QuickBASIC	B-Language
's	O
memory	O
limitations	O
and	O
switched	O
to	O
Microsoft	B-Language
Basic	I-Language
PDS	I-Language
7.1	O
,	O
which	O
solved	O
these	O
problems	O
for	O
a	O
short	O
time	O
.	O
</s>
<s>
After	O
version	O
0.63	O
,	O
QB64	B-Application
was	O
able	O
to	O
compile	O
itself	O
so	O
the	O
conventional	B-Device
memory	I-Device
limitations	O
no	O
longer	O
applied	O
.	O
</s>
<s>
Regarding	O
the	O
impetus	O
for	O
QB64	B-Application
,	O
Galleon	O
said	O
:	O
</s>
<s>
QB64	B-Application
's	O
syntax	O
is	O
designed	O
to	O
be	O
completely	O
backwards	O
compatible	O
with	O
QuickBASIC	B-Language
.	O
</s>
<s>
Line	B-Application
numbers	I-Application
are	O
not	O
required	O
,	O
and	O
statements	O
are	O
terminated	O
by	O
newlines	O
or	O
separated	O
by	O
colons	O
(	O
:	O
)	O
.	O
</s>
<s>
An	O
example	O
of	O
QB64	B-Application
's	O
emulation	O
of	O
VGA	O
memory	O
for	O
compatibility	O
:	O
</s>
<s>
An	O
example	O
of	O
how	O
QB64	B-Application
allows	O
audio	O
files	O
:	O
</s>
<s>
An	O
example	O
of	O
how	O
QB64	B-Application
allows	O
picture	O
files	O
:	O
</s>
<s>
An	O
example	O
of	O
how	O
QB64	B-Application
uses	O
multiple	O
timers	O
:	O
</s>
<s>
QB64	B-Application
's	O
extended	O
commands	O
begin	O
with	O
an	O
underscore	O
in	O
order	O
to	O
avoid	O
conflicts	O
with	O
any	O
names	O
that	O
may	O
be	O
used	O
in	O
a	O
QuickBASIC	B-Language
program	O
.	O
</s>
<s>
QB64	B-Application
extends	O
the	O
QuickBASIC	B-Language
language	O
in	O
several	O
ways	O
.	O
</s>
<s>
It	O
adds	O
the	O
new	O
data	O
types	O
including	O
_BIT	O
,	O
_BYTE	O
,	O
_INTEGER64	O
and	O
_FLOAT	O
as	O
well	O
as	O
unsigned	B-Algorithm
data	O
types	O
.	O
</s>
<s>
QB64	B-Application
also	O
includes	O
an	O
audio	O
library	B-Library
which	O
allows	O
playing	O
most	O
common	O
audio	O
formats	O
including	O
MP3	B-Application
,	O
Ogg	B-Algorithm
Vorbis	I-Algorithm
,	O
and	O
WAV	O
files	O
as	O
well	O
as	O
libraries	O
allowing	O
users	O
to	O
use	O
higher	O
resolution	O
graphics	O
than	O
the	O
640×480	O
offered	O
by	O
QuickBASIC	B-Language
,	O
use	O
different	O
fonts	O
,	O
and	O
plot	O
images	O
in	O
BMP	B-Device
,	O
PNG	O
,	O
and	O
JPEG	O
formats	O
.	O
</s>
<s>
The	O
programmer	O
also	O
does	O
not	O
have	O
to	O
specify	O
which	O
programming	B-Library
libraries	I-Library
to	O
include	O
since	O
QB64	B-Application
does	O
it	O
automatically	O
.	O
</s>
<s>
The	O
programmer	O
has	O
the	O
option	O
to	O
include	O
a	O
library	B-Library
of	O
their	O
own	O
through	O
the	O
command	O
just	O
as	O
QuickBASIC	B-Language
did	O
.	O
</s>
<s>
This	O
mode	O
has	O
its	O
own	O
proprietary	O
packet	O
encapsulation	O
format	O
which	O
,	O
whilst	O
being	O
easy	O
to	O
use	O
with	O
QBasic	B-Language
,	O
meant	O
that	O
it	O
could	O
only	O
be	O
used	O
to	O
communicate	O
with	O
other	O
QB64	B-Application
programs	O
or	O
server	O
backends	O
with	O
custom	O
interfaces	O
created	O
specifically	O
for	O
the	O
application	O
.	O
</s>
<s>
QB64	B-Application
gives	O
instant	O
access	O
to	O
32-bit	O
graphics	O
files	O
(	O
most	O
popular	O
formats	O
)	O
.	O
</s>
<s>
QB64	B-Application
gives	O
instant	O
access	O
to	O
several	O
audio	O
formats	O
.	O
</s>
<s>
QB64	B-Application
integrates	O
FreeGLUT	B-Application
for	O
its	O
graphics	O
and	O
text	O
.	O
</s>
<s>
A	O
development	O
branch	O
of	O
the	O
repository	O
hosted	O
on	O
GitHub	B-Application
is	O
frequently	O
updated	O
with	O
fixes	O
and	O
improvements	O
,	O
which	O
will	O
eventually	O
become	O
the	O
next	O
stable	O
release	O
.	O
</s>
<s>
QB64	B-Application
can	O
also	O
use	O
DLL	O
libraries	O
for	O
Windows	O
and	O
C++	B-Language
headers	O
with	O
a	O
DECLARE	O
LIBRARY	B-Library
block	O
.	O
</s>
<s>
Due	O
to	O
a	O
in	O
2022	O
,	O
there	O
are	O
now	O
at	O
least	O
two	O
forks	O
of	O
the	O
QB64	B-Application
project	O
.	O
</s>
<s>
The	O
"	O
QB64	B-Application
Team	O
"	O
Github	B-Application
repository	O
is	O
no	O
longer	O
active	O
,	O
and	O
all	O
new	O
development	O
is	O
being	O
done	O
in	O
new	O
forks	O
:	O
</s>
