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Adaptec also developed generic SCSI disk and CD-ROM drivers for DOS (ASPICD.SYS and ASPIDISK.SYS). [3]: 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.
At first, Adaptec focused on devices with Parallel SCSI interfaces. Popular host bus adapters included the 154x/15xx ISA family, the 2940 PCI family, and the 29160/-320 family. Their cross-platform ASPI was an early API for accessing and integrating non- disk devices like tape drives , scanners and optical disks .
BusLogic, Inc. (originally BusTek, Inc.), was an American computer company active from 1988 to 1996.It specialized in the production of Small Computer System Interface (SCSI) device controller chips and controller expansion cards, becoming a dominant player in that market, behind only Adaptec.
SCSI was introduced in the 1980s and has seen widespread use on servers and high-end workstations, with new SCSI standards being published as recently as SAS-4 in 2017. The SCSI standards define commands, protocols, electrical, optical and logical interfaces. The SCSI standard defines command sets for specific peripheral device types; the ...
Introduced in early 1986, the TMC-820 was marketed on the merit of its ease of use, omitting any jumpers on board, configuration instead being done in firmware as well as drivers on floppy disk. [4] Future Domain was one of the first SCSI host adapter manufacturers on the market, at a time when Adaptec and NCR had dominated the field as early ...
Some adapters cards, such as certain SCSI adapters (e.g. some made by Adaptec), were available in versions that differed only in the presence or absence of the option ROM to enable booting from attached SCSI devices. As a result of the option ROM scanning protocol, the highest-addressed option ROM is the last one to be initialized and so the ...
The storage port drivers provide an interface for Win32 applications to send SCSI Command Descriptor Block (CDB) messages to SCSI devices. The interfaces are IOCTL_SCSI_PASS_THROUGH and IOCTL_SCSI_PASS_THROUGH_DIRECT. Applications can build a pass-through request and send it to the device by using this IOCTL.
Diagrams of different Parallel SCSI symbols [1]. Parallel SCSI is not a single standard, but a suite of closely related standards. There are a dozen SCSI interface names, most with ambiguous wording (like Fast SCSI, Fast Wide SCSI, Ultra SCSI, and Ultra Wide SCSI); three SCSI standards, each of which has a collection of modular, optional features; several different connector types; and three ...