<s>
CWSDPMI	B-Application
is	O
a	O
32-bit	O
DPMI	O
host	O
written	O
by	O
Charles	B-Application
W	I-Application
.	I-Application
Sandmann	I-Application
from	O
1996	O
to	O
2010	O
,	O
currently	O
at	O
r7	O
.	O
</s>
<s>
It	O
is	O
loosely	O
based	O
upon	O
prior	O
GO32.EXE	O
code	O
used	O
in	O
DJGPP	B-Application
v1	O
.	O
</s>
<s>
It	O
can	O
provide	O
DPMI	O
0.90	O
+	O
32-bit	O
services	O
for	O
programs	O
compiled	O
with	O
latest	O
versions	O
of	O
DJGPP	B-Application
etc	O
.	O
</s>
<s>
Since	O
r5	O
,	O
it	O
can	O
also	O
be	O
used	O
for	O
programs	O
requiring	O
a	O
DPMI	O
stub	O
in	O
lieu	O
of	O
PMODE/DJ	O
.	O
</s>
<s>
It	O
supports	O
up	O
to	O
4	O
GB	O
,	O
virtual	B-Architecture
memory	I-Architecture
,	O
and	O
hardware	O
interrupt	O
reflection	O
from	O
real	B-Application
mode	I-Application
to	O
protected	B-Application
mode	I-Application
.	O
</s>
<s>
Programs	O
compiled	O
with	O
DJGPP	B-Application
v2	O
require	O
a	O
DPMI	O
host	O
,	O
which	O
is	O
usually	O
CWSDPMI.EXE	B-Application
or	O
CWSDPR0.EXE	B-Application
.	O
</s>
<s>
In	O
case	O
of	O
CWSDPMI.EXE	B-Application
,	O
the	O
default	O
paging/virtual	O
memory	O
file	O
is	O
C:\CWSDPMI.SWP	O
.	O
</s>
<s>
CWSDPMI	B-Application
is	O
functionally	O
similar	O
to	O
other	O
32-bit	O
DPMI	O
hosts	O
such	O
as	O
HDPMI32	B-Device
,	O
which	O
is	O
part	O
of	O
HX	B-Device
DOS	I-Device
Extender	I-Device
.	O
</s>
<s>
CWSDPMI	B-Application
r7	O
is	O
free	B-License
and	I-License
open-source	I-License
software	I-License
.	O
</s>
<s>
CWSDSTUB.EXE	B-Application
is	O
a	O
stub	O
loader	O
image	O
for	O
DJGPP	B-Application
which	O
includes	O
CWSDPMI	B-Application
.	O
</s>
<s>
CWSDPR0.EXE	B-Application
is	O
an	O
alternative	O
version	O
,	O
implemented	O
at	O
request	O
of	O
id	O
Software	O
when	O
writing	O
Quake	B-Application
,	O
which	O
runs	O
at	O
ring	B-Operating_System
0	I-Operating_System
with	O
virtual	B-Architecture
memory	I-Architecture
disabled	O
.	O
</s>
<s>
It	O
may	O
be	O
used	O
if	O
access	O
to	O
ring	B-Operating_System
0	I-Operating_System
features	O
are	O
desired	O
.	O
</s>
<s>
It	O
currently	O
does	O
not	O
switch	O
stacks	O
on	O
hardware	O
interrupts	O
,	O
so	O
some	O
DJGPP	B-Application
features	O
such	O
as	O
SIGINT	B-General_Concept
and	O
SIGFPE	B-General_Concept
are	O
not	O
supported	O
and	O
will	O
generate	O
a	O
double	B-General_Concept
fault	I-General_Concept
or	O
stack	O
fault	O
error	O
.	O
</s>
<s>
Developer	O
Charles	B-Application
W	I-Application
.	I-Application
Sandmann	I-Application
also	O
hoped	O
to	O
eventually	O
supply	O
code	O
for	O
CWSDPMI	B-Application
r7	O
that	O
allows	O
CWSDPMI	B-Application
to	O
map	O
up	O
to	O
64	O
GB	O
memory	O
into	O
the	O
address	O
space	O
upon	O
request	O
.	O
</s>
