<s>
PowerPC	B-Device
Reference	I-Device
Platform	I-Device
(	O
PReP	B-Device
)	O
was	O
a	O
standard	O
system	B-Architecture
architecture	I-Architecture
for	O
PowerPC-based	O
computer	O
systems	O
(	O
as	O
well	O
as	O
a	O
reference	O
implementation	O
)	O
developed	O
at	O
the	O
same	O
time	O
as	O
the	O
PowerPC	B-Architecture
processor	I-Architecture
architecture	O
.	O
</s>
<s>
Published	O
by	O
IBM	O
in	O
1994	O
,	O
it	O
allowed	O
hardware	O
vendors	O
to	O
build	O
a	O
machine	O
that	O
could	O
run	O
various	O
operating	O
systems	O
,	O
including	O
Windows	B-Device
NT	I-Device
,	O
OS/2	B-Application
,	O
Solaris	B-Application
,	O
Taligent	B-Operating_System
and	O
AIX	B-Application
.	O
</s>
<s>
One	O
of	O
the	O
stated	O
goals	O
of	O
the	O
PReP	B-Device
specification	O
was	O
to	O
leverage	O
standard	O
PC	O
hardware	O
.	O
</s>
<s>
Apple	O
,	O
wishing	O
to	O
seamlessly	O
transition	O
its	O
Macintosh	B-Device
computers	I-Device
to	O
PowerPC	B-Architecture
,	O
found	O
this	O
to	O
be	O
particularly	O
problematic	O
.	O
</s>
<s>
As	O
it	O
appeared	O
no	O
one	O
was	O
particularly	O
happy	O
with	O
PReP	B-Device
,	O
a	O
new	O
standard	O
,	O
the	O
Common	B-Device
Hardware	I-Device
Reference	I-Device
Platform	I-Device
(	O
CHRP	B-Device
)	O
,	O
was	O
developed	O
and	O
published	O
in	O
late	O
1995	O
,	O
incorporating	O
the	O
elements	O
of	O
both	O
PReP	B-Device
and	O
the	O
Power	B-Device
Macintosh	I-Device
architecture	O
.	O
</s>
<s>
Key	O
to	O
CHRP	B-Device
was	O
the	O
requirement	O
for	O
Open	B-Architecture
Firmware	I-Architecture
(	O
also	O
required	O
in	O
PReP-compliant	O
systems	O
delivered	O
after	O
June	O
1	O
,	O
1995	O
)	O
,	O
which	O
gave	O
vendors	O
greatly	O
improved	O
support	O
during	O
the	O
boot	O
process	O
,	O
allowing	O
the	O
hardware	O
to	O
be	O
far	O
more	O
varied	O
.	O
</s>
<s>
PReP	B-Device
systems	O
were	O
never	O
popular	O
.	O
</s>
<s>
Finding	O
current	O
,	O
readily	O
available	O
operating	O
systems	O
for	O
old	O
PReP	B-Device
hardware	O
can	O
be	O
difficult	O
.	O
</s>
<s>
Debian	O
and	O
NetBSD	B-Device
still	O
maintain	O
their	O
respective	O
ports	O
to	O
this	O
architecture	O
,	O
although	O
developer	O
and	O
user	O
activity	O
is	O
extremely	O
low	O
.	O
</s>
<s>
The	O
RTEMS	B-Operating_System
real-time	O
operating	O
system	O
provides	O
a	O
board	O
support	O
package	O
for	O
PReP	B-Device
which	O
can	O
be	O
run	O
utilizing	O
the	O
QEMU	B-Application
PReP	B-Device
emulator	O
.	O
</s>
<s>
This	O
provides	O
a	O
convenient	O
development	O
environment	O
for	O
PowerPC-based	O
real-time	O
,	O
embedded	O
systems	O
.	O
</s>
<s>
Power.org	O
has	O
a	O
Power	B-Device
Architecture	I-Device
Platform	I-Device
Reference	I-Device
(	O
PAPR	O
)	O
that	O
provides	O
the	O
foundation	O
for	O
development	O
of	O
Power	O
ISA-based	O
computers	O
running	O
the	O
Linux	B-Application
operating	I-Application
system	I-Application
.	O
</s>
