Atari ACSI (hard disk interface)

E217425

computer hardware interface storage interface

The Atari ACSI (Atari Computer System Interface) is a proprietary hard disk interface used on Atari ST computers, derived from and largely compatible with the SCSI standard for connecting external storage devices.

Try in SPARQL Jump to: Surface forms Disambiguation Statements Elicitation Referenced by

All labels observed (3)

Label	Occurrences
Atari Computer System Interface	4
Atari ACSI (hard disk interface) canonical	1
Atari Megafile hard disks (via ACSI)	1

How this entity was disambiguated

This entity first appeared as the object of triple T1931612 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Atari ACSI (hard disk interface)
Context triple: [Atari ST, bus, Atari ACSI (hard disk interface)]

A. Atari ST
The Atari ST is a 16/32-bit home computer line from the mid-1980s known for its advanced graphics and MIDI capabilities, popular in gaming, music production, and desktop publishing.
B. Atari Falcon
The Atari Falcon is a 32-bit home computer released by Atari in the early 1990s, notable for its advanced audio and graphics capabilities and based on the Motorola 68030 processor.
C. Amiga
Amiga is a family of advanced 16/32-bit home computers developed by Commodore in the 1980s and early 1990s, renowned for their pioneering multimedia and gaming capabilities.
D. Commodore Amiga 500
The Commodore Amiga 500 is a late-1980s home computer known for its advanced graphics and sound capabilities, making it popular for gaming, multimedia, and creative applications.
E. Original Amiga chipset (OCS)
The Original Amiga Chipset (OCS) is the first-generation custom graphics and sound hardware architecture used in early Commodore Amiga computers, renowned for its advanced multimedia capabilities in the mid-1980s.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Atari ACSI (hard disk interface)
Target entity description: The Atari ACSI (Atari Computer System Interface) is a proprietary hard disk interface used on Atari ST computers, derived from and largely compatible with the SCSI standard for connecting external storage devices.

A. Atari ST
The Atari ST is a 16/32-bit home computer line from the mid-1980s known for its advanced graphics and MIDI capabilities, popular in gaming, music production, and desktop publishing.
B. Atari Falcon
The Atari Falcon is a 32-bit home computer released by Atari in the early 1990s, notable for its advanced audio and graphics capabilities and based on the Motorola 68030 processor.
C. Amiga
Amiga is a family of advanced 16/32-bit home computers developed by Commodore in the 1980s and early 1990s, renowned for their pioneering multimedia and gaming capabilities.
D. Commodore Amiga 500
The Commodore Amiga 500 is a late-1980s home computer known for its advanced graphics and sound capabilities, making it popular for gaming, multimedia, and creative applications.
E. Original Amiga chipset (OCS)
The Original Amiga Chipset (OCS) is the first-generation custom graphics and sound hardware architecture used in early Commodore Amiga computers, renowned for its advanced multimedia capabilities in the mid-1980s.
F. None of above. chosen

Statements (44)

Predicate	Object
instanceOf	computer hardware interface ⓘ storage interface ⓘ
abbreviationOf	Atari Computer System Interface ⓘ linked to: Atari ACSI (hard disk interface)
addressing	limited number of device IDs compared to full SCSI ⓘ
alsoKnownAs	Atari DMA port interface ⓘ
busWidth	8-bit ⓘ
category	Atari ST hardware ⓘ linked to: Atari ST computer storage buses ⓘ legacy computer interfaces ⓘ
compatibilityType	largely compatible with SCSI at command level ⓘ
compatibleWith	SCSI ⓘ
connectionLocation	external DMA port on Atari ST-family computers ⓘ
connectionMethod	daisy-chain of external devices via ACSI-to-SCSI adapters ⓘ
dataTransferMode	parallel ⓘ
derivedFromStandard	SCSI ⓘ
designedFor	Atari ST operating system TOS ⓘ linked to: Atari TOS
developer	Atari Corporation ⓘ linked to: Atari, Inc.
distinctionFromSCSI	uses Atari-specific DMA controller instead of generic SCSI host adapter ⓘ uses different physical connector than standard SCSI ⓘ
documentation	described in Atari ST developer documentation and hardware reference manuals ⓘ
era	1980s home computer era ⓘ
fullName	Atari Computer System Interface ⓘ linked to: Atari ACSI (hard disk interface)
historicalSignificance	enabled affordable hard disk support on Atari ST computers ⓘ
interfaceType	external storage interface ⓘ hard disk interface ⓘ
introducedWithProductLine	Atari 520ST ⓘ linked to: Atari ST
manufacturer	Atari Corporation ⓘ linked to: Atari, Inc.
ownership	proprietary to Atari ⓘ
primaryUse	connecting external hard disk drives ⓘ connecting external storage devices ⓘ
protocolLayer	Atari-specific DMA protocol over SCSI-like command set ⓘ
requires	ACSI host adapter for standard SCSI devices ⓘ
roleInSystem	mass storage expansion interface ⓘ
signalLevel	TTL-level parallel signals ⓘ
supportsDeviceType	CD-ROM drive ⓘ hard disk drive ⓘ tape drive ⓘ
typicalDataRate	lower than contemporary full SCSI implementations ⓘ
usedOnPlatform	Atari Falcon030 ⓘ linked to: Atari Falcon Atari Mega ST ⓘ linked to: Atari ST Atari Mega STE ⓘ linked to: Atari ST Atari ST ⓘ Atari STE ⓘ linked to: Atari ST Atari TT030 ⓘ

How these facts were elicited

Referenced by (6)

Full triples — surface form annotated when it differs from this entity's canonical label.

Atari ST → bus → Atari ACSI (hard disk interface) ⓘ

Atari ACSI → fullName → Atari Computer System Interface ⓘ

subject linked to: Atari ACSI (hard disk interface)