Advanced SCSI Programming Interface: Difference between revisions

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{{Short description|Computer software for connecting SCSI devices}}
{{Short description|Computer software for connecting SCSI devices}}
The '''Advanced SCSI Programming Interface''' ('''ASPI''') is a programming interface developed by [[Adaptec]] which standardizes [[communication]] on a [[computer bus]] between a [[SCSI]] [[device driver|driver]] module on the one hand and SCSI (and [[ATAPI]]) [[peripheral]]s on the other.<ref name=guide>{{cite book | last=Sawert | first=Brian | date=1998 | url=https://archive.org/details/programmersguide0000sawe/page/55/ | title=The Programmer's Guide to SCSI | publisher=Addison-Wesley | pages=55–102, 233 | isbn=0201185385 | via=Google Books}}</ref>{{rp|55–56}}<ref>{{cite journal | last=White | first=Myles | date=May 25, 1995 | url=https://www.newspapers.com/article/the-toronto-star-getting-your-components/159678613/ | title=Getting your components to work together, part II | work=The Toronto Star | page=H3 | via=Newspapers.com}}</ref>
The '''Advanced SCSI Programming Interface''' ('''ASPI''') is a programming interface developed by [[Adaptec]] which standardizes communication on a [[computer bus]] between a [[SCSI]] [[device driver|driver]] module and SCSI (and [[ATAPI]]) [[peripheral]]s.<ref name=guide>{{cite book | last=Sawert | first=Brian | date=1998 | url=https://archive.org/details/programmersguide0000sawe/page/55/ | title=The Programmer's Guide to SCSI | publisher=Addison-Wesley | pages=55–102, 233 | isbn=0201185385 | via=Google Books}}</ref>{{rp|55–56}}<ref>{{cite journal | last=White | first=Myles | date=May 25, 1995 | url=https://www.newspapers.com/article/the-toronto-star-getting-your-components/159678613/ | title=Getting your components to work together, part II | journal=The Toronto Star | page=H3 | via=Newspapers.com}}</ref>


== Structure ==
== Structure ==
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== History ==
== History ==


ASPI was developed by [[Adaptec]] around 1989<ref name=hoovers>{{cite book | editor-last=Spain | editor-first=Patrick J. | editor2=James R. Talbot | date=1995 | url=https://archive.org/details/hoovershandbooko0000unse_j4c4/page/118/ | title=Hoover's Handbook of Emerging Compaies 1995: Profiles of America's Most Exciting Growth Enterprises | publisher=The Reference Press | page=118 | isbn=9781878753755 | via=Google Books}}</ref> and was formally introduced in January 1990. Originally supporting only [[MS-DOS]],<ref name=brownstein>{{cite journal | last=Brownstein | first=Mark | date=January 15, 1990 | url=https://books.google.com/books?id=eTAEAAAAMBAJ&pg=PA409 | title=Adaptec Unveils SCSI Interface Standard | work=InfoWorld | publisher=IDG Publications | volume=12 | issue=3 | page=23 | via=Google Books}}</ref> support for [[NetWare]] was added in 1991, while support for [[OS/2]] and [[Windows 3.x]] was added in 1992.<ref name=hoovers /><ref name=redefines>{{cite journal | last=Guzman | first=Ed | date=June 1992 | url=https://www.proquest.com/docview/220619290/ | title=ASPI Refines SCSI I/O Routing | work=Computer Technology Review | publisher=West World Publications | volume=12 | issue=7 | page=22 | via=ProQuest}}</ref> Originally developed only for SCSI devices, support for [[ATAPI]] devices was added later.<ref>{{cite book | last=Mueller | first=Scott | date=2003 | edition=14th | url=https://www.google.com/books/edition/Upgrading_and_Repairing_PCs/eV1_LjW3pTkC | title=Upgrading and Repairing PCs | publisher=Que | pages=563–564, 771–772 | isbn=9780789727459 | via=Google Books}}</ref>{{rp|772}} Most other SCSI host adapter vendors (for example [[BusLogic]], DPT, AMI, [[Future Domain]], DTC) shipped their own ASPI managers with their hardware.<ref>{{cite journal|last=Myers|first=Ben|title=More on ASPI|url=https://www.drdobbs.com/letters/184409247|page=10|volume=19|issue=5|date=May 1994|journal=Dr. Dobb's Journal|publisher=UBM LLC|archiveurl=https://web.archive.org/web/20241125034059/https://www.drdobbs.com/letters/184409247|archivedate=November 25, 2024|url-status=live}}</ref>
ASPI was developed by [[Adaptec]] around 1989<ref name="hoovers">{{cite book |url=https://archive.org/details/hoovershandbooko0000unse_j4c4/page/118/ |title=Hoover's Handbook of Emerging Compa[n]ies 1995: Profiles of America's Most Exciting Growth Enterprises |date=1995 |publisher=The Reference Press |isbn=9781878753755 |editor-last=Spain |editor-first=Patrick J. |page=118 |editor2=James R. Talbot |via=Google Books}}</ref> and was formally introduced in January 1990. Originally supporting only [[MS-DOS]],<ref name=brownstein>{{cite journal | last=Brownstein | first=Mark | date=January 15, 1990 | url=https://books.google.com/books?id=eTAEAAAAMBAJ&pg=PA409 | title=Adaptec Unveils SCSI Interface Standard | journal=InfoWorld | publisher=IDG Publications | volume=12 | issue=3 | page=23 | via=Google Books}}</ref> support for [[NetWare]] was added in 1991, while support for [[OS/2]] and [[Windows 3.x]] was added in 1992.<ref name=hoovers /><ref name=redefines>{{cite journal | last=Guzman | first=Ed | date=June 1992 | url=https://www.proquest.com/docview/220619290 | title=ASPI Refines SCSI I/O Routing | journal=Computer Technology Review | publisher=West World Publications | volume=12 | issue=7 | page=22 | id={{ProQuest|220619290}} }}</ref> Originally developed only for SCSI devices, support for [[ATAPI]] devices was added later.<ref>{{cite book | last=Mueller | first=Scott | date=2003 | edition=14th | url=https://books.google.com/books?id=eV1_LjW3pTkC | title=Upgrading and Repairing PCs | publisher=Que | pages=563–564, 771–772 | isbn=9780789727459 | via=Google Books}}</ref>{{rp|772}} Most other SCSI host adapter vendors (for example [[BusLogic]], DPT, AMI, [[Future Domain]], DTC) shipped their own ASPI managers with their hardware.<ref>{{cite journal|last=Myers|first=Ben|title=More on ASPI|url=https://www.drdobbs.com/letters/184409247|page=10|volume=19|issue=5|date=May 1994|journal=Dr. Dobb's Journal|publisher=UBM LLC|archiveurl=https://web.archive.org/web/20241125034059/https://www.drdobbs.com/letters/184409247|archivedate=November 25, 2024|url-status=live}}</ref>


Adaptec also developed generic SCSI disk and CD-ROM drivers for DOS ({{mono|ASPICD.SYS}} and {{mono|ASPIDISK.SYS}}).<ref name=bookofscsi>{{cite book | last=Ridge | first=Peter M. | date=1995 | url=https://www.google.com/books/edition/The_Book_of_SCSI/etcmAQAAMAAJ?hl=en&gbpv=1&bsq=%22ASPIDISK.SYS%22+%22ASPICD.SYS%22&dq=%22ASPIDISK.SYS%22+%22ASPICD.SYS%22&printsec=frontcover | title=The Book of SCSI: A Guide for Adventurers | publisher=No Starch Press | isbn=9781886411029 | via=Google Books}}</ref>{{rp|60–61}}
Adaptec also developed generic SCSI disk and CD-ROM drivers for DOS ({{mono|ASPICD.SYS}} and {{mono|ASPIDISK.SYS}}).<ref name=bookofscsi>{{cite book | last=Ridge | first=Peter M. | date=1995 | url=https://books.google.com/books?id=etcmAQAAMAAJ&q=%22ASPIDISK.SYS%22+%22ASPICD.SYS%22 | title=The Book of SCSI: A Guide for Adventurers | publisher=No Starch Press | isbn=9781886411029 | via=Google Books}}</ref>{{rp|60–61}}


At least a couple of other programming interfaces for SCSI device drivers competed with ASPI in the early 1990s, including CAM (Common Access Method), developed by Apple; and Layered Device Driver Architecture, developed by [[Microsoft]]. However, ASPI was far and away more common than any of its competitors in this space, with ''PC Magazine'' declaring it a ''de facto'' standard for developing SCSI device drivers only two years after its introduction.<ref>{{cite journal | last=Thomas | first=Susan G. | date=April 28, 1992 | url=https://books.google.com/books?id=HERlo0BgpGYC&pg=PT32 | title=SCSI Protocol Wars: ASPI, CAM, LADDR | work=PC Magazine | publisher=Ziff-Davis | volume=11 | issue=8 | page=31 | via=Google Books}}</ref>
At least a couple of other programming interfaces for SCSI device drivers competed with ASPI in the early 1990s, including CAM (Common Access Method), developed by Apple; and Layered Device Driver Architecture, developed by [[Microsoft]]. However, ASPI was far and away more common than any of its competitors in this space, with ''PC Magazine'' declaring it a ''de facto'' standard for developing SCSI device drivers only two years after its introduction.<ref>{{cite journal | last=Thomas | first=Susan G. | date=April 28, 1992 | url=https://books.google.com/books?id=HERlo0BgpGYC&pg=PT32 | title=SCSI Protocol Wars: ASPI, CAM, LADDR | journal=PC Magazine | publisher=Ziff-Davis | volume=11 | issue=8 | page=31 | via=Google Books}}</ref>


Starting in 1995, Microsoft licensed the interface for use with their [[Windows 9x]] operating systems. At the same time [[Microsoft]] developed SCSI Pass Through Interface (SPTI), an in-house substitute that worked on the NT platform. Microsoft did not include ASPI in [[Windows 2000]]/[[Windows XP|XP]], in favor of its own SPTI.<ref>{{cite journal | last=Tewell | first=Thomas | date=December 1997 | url=https://www.drdobbs.com/windows/writing-portable-win32-scsi-applications/184410340 | title=Writing Portable Win32 SCSI Applications | work=Dr. Dobb's Journal | publisher=UBM LLC | volume=22 | issue=12 | pages=56–57 | archiveurl=https://web.archive.org/web/20141218172923/https://www.drdobbs.com/windows/writing-portable-win32-scsi-applications/184410340 | archivedate=December 18, 2014}}</ref>
Starting in 1995, Microsoft licensed the interface for use with their [[Windows 9x]] operating systems. At the same time [[Microsoft]] developed SCSI Pass Through Interface (SPTI), an in-house substitute that worked on the NT platform. Microsoft did not include ASPI in [[Windows 2000]]/[[Windows XP|XP]], in favor of its own SPTI.<ref>{{cite journal | last=Tewell | first=Thomas | date=December 1997 | url=https://www.drdobbs.com/windows/writing-portable-win32-scsi-applications/184410340 | title=Writing Portable Win32 SCSI Applications | journal=Dr. Dobb's Journal | publisher=UBM LLC | volume=22 | issue=12 | pages=56–57 | archiveurl=https://web.archive.org/web/20141218172923/https://www.drdobbs.com/windows/writing-portable-win32-scsi-applications/184410340 | archivedate=December 18, 2014}}</ref>


To support [[Universal Serial Bus|USB]] drives under DOS, [[Panasonic]] developed a universal ASPI driver ({{mono|USBASPI.SYS}}) that bypasses the lack of native USB support by DOS.<ref>{{cite book | date=2006 | url=https://www.google.com/books/edition/%E8%BD%AF%E4%BB%B6%E5%AE%89%E8%A3%85%E5%AE%8C%E5%85%A8%E6%89%8B%E5%86%8C/bf6LjPgbE9QC?hl=en&gbpv=1&dq=%22USBASPI.SYS%22&pg=PA130&printsec=frontcover | title=软件安装完全手册 | trans-title=Complete Software Installation Manual | lang=Chinese | publisher=Science Press | page=130 | via=Google Books}}</ref>
To support [[Universal Serial Bus|USB]] drives under DOS, [[Panasonic]] developed a universal ASPI driver ({{mono|USBASPI.SYS}}) that bypasses the lack of native USB support by DOS.<ref>{{cite book | date=2006 | url=https://books.google.com/books?id=bf6LjPgbE9QC&dq=%22USBASPI.SYS%22&pg=PA130 | title=软件安装完全手册 | trans-title=Complete Software Installation Manual | lang=Chinese | publisher=Science Press | page=130 | isbn=978-7-03-018123-7 | via=Google Books}}</ref>


== Drivers ==
== Drivers ==
ASPI was provided by the following drivers:
Examples of ASPI drivers:
:
:
{| class="wikitable" border="1"
{| class="wikitable" border="1"

Latest revision as of 03:15, 9 November 2025

Template:Short description The Advanced SCSI Programming Interface (ASPI) is a programming interface developed by Adaptec which standardizes communication on a computer bus between a SCSI driver module and SCSI (and ATAPI) peripherals.[1]Template:Rp[2]

Structure

The ASPI manager software provides an interface between ASPI modules (device drivers or applications with direct SCSI support), a SCSI host adapter, and SCSI devices connected to the host adapter. The ASPI manager is specific to the host adapter and operating system; its primary role is to abstract the host adapter specifics and provide a generic software interface to SCSI devices.[1]Template:Rp

On Windows 9x and Windows NT, the ASPI manager is generic and relies on the services of SCSI miniport drivers. On those systems, the ASPI interface is designed for applications which require SCSI pass-through functionality (such as CD-ROM burning software).[1]Template:Rp

The primary operations supported by ASPI are discovery of host adapters and attached devices, and submitting SCSI commands to devices via SRBs (SCSI Request Blocks).[1]Template:Rp ASPI supports concurrent execution of SCSI commands.[3]Template:Rp

History

ASPI was developed by Adaptec around 1989[4] and was formally introduced in January 1990. Originally supporting only MS-DOS,[5] support for NetWare was added in 1991, while support for OS/2 and Windows 3.x was added in 1992.[4][6] Originally developed only for SCSI devices, support for ATAPI devices was added later.[7]Template:Rp Most other SCSI host adapter vendors (for example BusLogic, DPT, AMI, Future Domain, DTC) shipped their own ASPI managers with their hardware.[8]

Adaptec also developed generic SCSI disk and CD-ROM drivers for DOS (Template:Mono and Template:Mono).[3]Template:Rp

At least a couple of other programming interfaces for SCSI device drivers competed with ASPI in the early 1990s, including CAM (Common Access Method), developed by Apple; and Layered Device Driver Architecture, developed by Microsoft. However, ASPI was far and away more common than any of its competitors in this space, with PC Magazine declaring it a de facto standard for developing SCSI device drivers only two years after its introduction.[9]

Starting in 1995, Microsoft licensed the interface for use with their Windows 9x operating systems. At the same time Microsoft developed SCSI Pass Through Interface (SPTI), an in-house substitute that worked on the NT platform. Microsoft did not include ASPI in Windows 2000/XP, in favor of its own SPTI.[10]

To support USB drives under DOS, Panasonic developed a universal ASPI driver (Template:Mono) that bypasses the lack of native USB support by DOS.[11]

Drivers

Examples of ASPI drivers:

Operating system Driver filename Bundled
MS-DOS Template:Mono or Template:Mono (USB drives only) No
Windows 3.1x Template:Mono No
Windows 95, 98 and ME Template:Mono, Template:Mono, Template:Mono and Template:Mono Yes
Windows NT, 2000, XP Template:Mono, Template:Mono No

See also

References

<templatestyles src="Reflist/styles.css" />

  1. ↑ a b c d Script error: No such module "citation/CS1".
  2. ↑ Script error: No such module "Citation/CS1".
  3. ↑ a b Script error: No such module "citation/CS1".
  4. ↑ a b Script error: No such module "citation/CS1".
  5. ↑ Script error: No such module "Citation/CS1".
  6. ↑ Script error: No such module "Citation/CS1".
  7. ↑ Script error: No such module "citation/CS1".
  8. ↑ Script error: No such module "Citation/CS1".
  9. ↑ Script error: No such module "Citation/CS1".
  10. ↑ Script error: No such module "Citation/CS1".
  11. ↑ Script error: No such module "citation/CS1".

Script error: No such module "Check for unknown parameters".

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