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Introduction
The Adaptec AHA
®
-2940Ultra and AHA-2940Ultra
Wide PCI-to-Fast SCSI host adapters provide a pow-
erful multitasking interface between your com-
puter’s PCI bus and SCSI devices (disk drives,
CD-ROM drives, scanners, tape backups, removable
media drives, etc.). Collectively, both host adapters
are referred to as the AHA-2940Ultra/2940Ultra
Wide. The following figures show the major compo-
nents on the AHA-2940Ultra and AHA-2940Ultra
Wide.
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Adaptec AHA-2940
Ultra
50-pin 8-bit Internal
SCSI Connector
Host
Adapter
LED
AIC-78xx SCSI Protocol Chip
50-pin 8-bit
External
SCSI
Connector
Host Adapter
BIOS
LED Connector
Adaptec AHA-2940
Ultra Wide
50-pin 8-bit Internal
SCSI Connector
Host
Adapter
LED
AIC-78xx SCSI Protocol Chip
68-pin 16-bit
External
SCSI
Connector
LED Connector
Host Adapter
BIOS
68-pin 16-bit
Internal SCSI
Connector