SBS Technologies 466-1, Hardware Manual

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Model 466-1 Adapter
80 Glossary
Data Lines: The SBus signals used to transfer data between masters and
slaves, and virtual addresses between masters and the SBus controller.
Dual Port RAM: An optional dual-port memory card installed on the
VMEbus adapter card.
Exchanging Interrupts: Sending interrupts to and receiving interrupts from
the remote chassis. This would also include any processing an application
should do to acknowledge the receipt of an interrupt.
FCodes: FORTH byte codes.
FIFO: First In First Out. A memory device in which data are retrieved in the
same sequence as stored.
G byte: Gigabyte. Two to the thirtieth power (exactly 1,073,741,824 bytes).
Geographic Addressing: A mechanism by which a part of the physical
address is presented to each SBus slave as an individual select signal, so that
at any given time only one slave is selected.
Grant Lines: The set of SBus signals (one per bus master), generated by the
SBus controller, that are used to tell masters when they may access the bus.
Hex: Hexadecimal notation. A numbering system that uses 16 digits
(0123456789ABCDEF) to denote a number.
K byte: Kilobyte. Two to the tenth power (exactly 1024) bytes.
Local: Pertaining to the system accessing either adapter card. Implies that it
is not necessary to go across the interface cable to access the resource.
Longword: 32 bits; in the SBus specification, 32-bit data are called words.
M byte: Megabyte. Two to the twentieth power (exactly 1,048,576) bytes.
M Byte/sec: Megabyte per second. Exactly 1,000,000 bytes per second.
msec:
Millisecond. 1/1,000 of a second.