Browse Prior Art Database

Bus Timeout Implementation Using Counters

IP.com Disclosure Number: IPCOM000099248D
Original Publication Date: 1990-Jan-01
Included in the Prior Art Database: 2005-Mar-14
Document File: 1 page(s) / 23K

Publishing Venue

IBM

Related People

Dhawan, S: AUTHOR [+2]

Abstract

A bus timeout is defined as a device on the MICRO not relinquishing use of the bus within a specified Such a device error can prevent other devices from the bus, thereby hanging the bus and the system. I/O Channel Controller (IOCC) must detect such a and attempt recovery of the bus.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Bus Timeout Implementation Using Counters

       A bus timeout is defined as a device on the MICRO not
relinquishing use of the bus within a specified  Such a device error
can prevent other devices from the bus, thereby hanging the bus and
the system. I/O Channel Controller (IOCC) must detect such a and
attempt recovery of the bus.

      One of the functions of the IOCC is to provide refresh the
MICRO CHANNEL.  The refresh rate is programmable four refresh cycles
every 15, 30 or 60 microseconds. bus timeout error is detected when a
refresh is required be executed and the previous refresh request has
not been  The IOCC will then execute a bus reset to attempt reset the
failing device and allow the system to restart bus.  This simple
implementation requires minimal logic.  Trademark of the IBM
Corporation.