User manual

Glossary

Resource Manager A message-based Commander located at Logical Address 0,

which provides configuration management services such as

address map configuration, Commander and Servant mappings,

and self-test and diagnostic management.

response A signal or interrupt generated by a device to notify another

device of an asynchronous event. Responses contain the

information in the Response register of a sender.

RM See Resource Manager.

RMW Read-Modify-Write cycle; a bus cycle in which data from a

single location is read, modified, and then written back.

ROAK Release On Acknowledge; a type of VXI interrupter which

always deasserts its interrupt line in response to an IACK cycle

on the VXIbus.

ROR Release On Request; a type of VMEbus arbitration where the

current VMEbus master relinquishes control of the bus only

when another bus master requests the VMEbus.

s seconds

Semi-Synchronous Protocol A one-line, open-collector, multiple-device handshake trigger

protocol.

Servant A device controlled by a Commander; there are message-based

and register-based Servants.

setting To place a binary cell into the 1 state (non-zero).

Shared Memory Protocol A communication protocol that uses a block of memory that is

accessible to both a client and a server. The memory block

operates as a message buffer for communications.

signal Any communication between message-based devices consisting

of a write to a Signal register. Sending a signal requires that the

sending device have VMEbus master capability.

SIMM Single In-line Memory Module