<s>
In	O
computing	O
,	O
ASPI	B-Application
(	O
Advanced	B-Application
SCSI	I-Application
Programming	I-Application
Interface	I-Application
)	O
is	O
an	O
Adaptec-developed	O
programming	O
interface	O
which	O
standardizes	O
communication	O
on	O
a	O
computer	B-General_Concept
bus	I-General_Concept
between	O
a	O
SCSI	B-Architecture
driver	O
module	O
on	O
the	O
one	O
hand	O
and	O
SCSI	B-Architecture
(	O
and	O
ATAPI	O
)	O
peripherals	O
on	O
the	O
other	O
.	O
</s>
<s>
The	O
ASPI	B-Application
manager	O
software	O
provides	O
an	O
interface	O
between	O
ASPI	B-Application
modules	O
(	O
device	O
drivers	O
or	O
applications	O
with	O
direct	O
SCSI	B-Architecture
support	O
)	O
,	O
a	O
SCSI	B-Architecture
host	O
adapter	O
,	O
and	O
SCSI	B-Architecture
devices	O
connected	O
to	O
the	O
host	O
adapter	O
.	O
</s>
<s>
The	O
ASPI	B-Application
manager	O
is	O
specific	O
to	O
the	O
host	O
adapter	O
and	O
operating	O
system	O
;	O
its	O
primary	O
role	O
is	O
to	O
abstract	O
the	O
host	O
adapter	O
specifics	O
and	O
provide	O
a	O
generic	O
software	O
interface	O
to	O
SCSI	B-Architecture
devices	O
.	O
</s>
<s>
On	O
Windows	O
9x	O
and	O
Windows	O
NT	O
,	O
the	O
ASPI	B-Application
manager	O
is	O
generic	O
and	O
relies	O
on	O
the	O
services	O
of	O
SCSI	B-Architecture
miniport	O
drivers	O
.	O
</s>
<s>
On	O
those	O
systems	O
,	O
the	O
ASPI	B-Application
interface	O
is	O
designed	O
for	O
applications	O
which	O
require	O
SCSI	B-Architecture
pass-through	O
functionality	O
(	O
such	O
as	O
CD-ROM	O
burning	O
software	O
)	O
.	O
</s>
<s>
The	O
primary	O
operations	O
supported	O
by	O
ASPI	B-Application
are	O
discovery	O
of	O
host	O
adapters	O
and	O
attached	O
devices	O
,	O
and	O
submitting	O
SCSI	B-Architecture
commands	O
to	O
devices	O
via	O
SRBs	O
(	O
SCSI	B-Architecture
Request	O
Blocks	O
)	O
.	O
</s>
<s>
ASPI	B-Application
supports	O
concurrent	O
execution	O
of	O
SCSI	B-Architecture
commands	O
.	O
</s>
<s>
Originally	O
inspired	O
by	O
a	O
driver	O
architecture	O
developed	O
by	O
Douglas	O
W	O
.	O
Goodall	O
for	O
Ampro	O
Computers	O
in	O
1983	O
,	O
ASPI	B-Application
was	O
developed	O
by	O
Adaptec	O
around	O
1990	O
.	O
</s>
<s>
It	O
was	O
originally	O
written	O
to	O
support	O
SCSI	B-Architecture
devices	O
;	O
support	O
for	O
ATAPI	O
devices	O
was	O
added	O
later	O
.	O
</s>
<s>
Most	O
other	O
SCSI	B-Architecture
host	O
adapter	O
vendors	O
(	O
for	O
example	O
BusLogic	O
,	O
DPT	O
,	O
AMI	O
,	O
Future	O
Domain	O
,	O
DTC	O
)	O
shipped	O
their	O
own	O
ASPI	B-Application
managers	O
with	O
their	O
hardware	O
.	O
</s>
<s>
Adaptec	O
also	O
developed	O
generic	O
SCSI	B-Architecture
disk	O
and	O
CD-ROM	O
drivers	O
for	O
DOS	O
(	O
ASPICD.SYS	O
and	O
ASPIDISK.SYS	O
)	O
.	O
</s>
<s>
At	O
the	O
same	O
time	O
Microsoft	O
developed	O
SCSI	B-Application
Pass	I-Application
Through	I-Application
Interface	I-Application
(	O
SPTI	B-Application
)	O
,	O
an	O
in-house	O
substitute	O
that	O
worked	O
on	O
the	O
NT	O
platform	O
.	O
</s>
<s>
Microsoft	O
did	O
not	O
include	O
ASPI	B-Application
in	O
Windows	O
2000/XP	O
,	O
in	O
favor	O
of	O
its	O
own	O
SPTI	B-Application
.	O
</s>
<s>
Users	O
may	O
still	O
download	O
ASPI	B-Application
from	O
Adaptec	O
.	O
</s>
<s>
A	O
number	O
of	O
CD/DVD	O
applications	O
also	O
continue	O
to	O
offer	O
their	O
own	O
implementations	O
of	O
ASPI	B-Application
layer	O
.	O
</s>
<s>
To	O
support	O
USB	B-Protocol
drives	O
under	O
DOS	O
,	O
Panasonic	O
developed	O
a	O
universal	O
ASPI	B-Application
driver	O
(	O
USBASPI.SYS	O
)	O
that	O
bypasses	O
the	O
lack	O
of	O
native	O
USB	B-Protocol
support	O
by	O
DOS	O
.	O
</s>
<s>
ASPI	B-Application
was	O
provided	O
by	O
the	O
following	O
drivers	O
.	O
</s>
