DEC AlphaServer 2100, Owner'S Manual

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full-height device
Standard form factor for 5 1/4-inch storage devices.
half-height device
Standard form factor for storage devices that are not the height
of full-height devices.
halt
The action of transferring control of the computer system to the
console program.
hose
The interface between the card cage and the I/O subsystems.
hot swap
The process of removing a device from the system without
shutting down the operating system or powering down the
hardware.
initialization
The sequence of steps that prepare the computer system to start.
Occurs after a system has been powered up.
instruction cache
A high-speed cache memory reserved for the storage of
instructions. Abbreviated as I-cache.
interrupt request lines (IRQs)
Bus signals that connect an EISA or ISA module (for example,
a disk controller) to the system so that the module can get the
system’s attention via an interrupt.
I/O backplane
One of two backplanes on the AlphaServer 2000 system. The I/O
backplane contains three PCI option slots and seven EISA option
slots. It also contains a SCSI channel, diskette controller, two
serial ports, and a parallel printer port.
Glossary–9