Disconnect/Reconnect
Disconnect is the function that occurs when a target releases con-
trol of the SCSI bus, allowing the bus to go to the Bus Free phase.
Reconnect is the function that occurs when a target selects an
initiator to continue an operation after a disconnect.
DMA
See Direct Memory Access
E
EEPROM
Electrically-Erasable Programmable Read Only Memory. An inte-
grated circuit used to store the host adapter configuration. The
data stored in the EEPROM can be updated while it is installed
on the host adapter.
EISA
Extended Industry Standard Architecture. A kind of computer
bus. EISA, an extension of the 16-bit ISA bus standard, allows
expansion devices like network cards, video adapters and
modems to transfer data across the PC bus 32 bits at a time. This
standard was introduced in 1988.
EISA Configuration
The operation of configuring a device on the EISA bus through
accessing registers in the device by the host. This replaces the
method of using jumpers commonly found on ISA bus devices.
EPROM
Erasable Programmable Read Only Memory. An integrated
circuit used to store the host adapter BIOS and firmware.
EZ-SCSI
See Adaptec EZ-SCSI.
F
FIFO
First In/First Out. A queuing order in which items are removed
from the queue for execution in the same order in which they are
placed in the queue. An integrated circuit that buffers data in
Adaptec AHA-2740 Series User’s Manual
Stock Number: 510381-00 / Rev. C (Page G-6)
Print Spec Number: 491709-00 Rev C
Current Date: 9/1/93 ECN Date: 9/14/93
AHA-2740 Series User’s Manual
Glossary-6
