SUNY Poly CS 521 - Reconfigurable Computers (28 pages)

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Reconfigurable Computers



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Reconfigurable Computers

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Pages:
28
School:
SUNY Polytechnic Institute
Course:
Cs 521 - Operating Systems

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Reconfigurable Adaptable Systems OS Charles Huntington Michelle Grieco Reconfigurable Adaptable Systems OS reconfigures its resource management policies based on application needs System adjust components change and OS must Reconfigurable OS in Dynamically Reconfigurable Operating Systems include Trends Plug Hot and Play Swappable Devices PCMCIA and USB devices Object Oriented Operating Systems Legacy Devices Prior to 1995 traditional computer cards had to be manually configured This type of hardware is categorized as legacy devices The hardware came with dip switches and or jumpers to configure their settings The problem A user had to understand extensively how their computer s resources were allocated to setup new hardware Another problem A legacy device s default settings caused conflicts in resource allocation ex sound cards network adapters IRQ 5 Plug and Play Devices now work out of the box Plug and Play Microsoft Intel and a few other hardware manufacturers developed the Plug and Play PnP standard to combat the problems with Legacy Devices A PnP OS stores the device drivers for many peripheral devices PnP works with the BIOS to determine the necessary resources for new hardware How PnP works The BIOS first searches the PCI and ISA busses to determine if the current hardware matches the existing configuration If the configuration has changed then the BIOS will assign resources to the legacy devices first The PnP devices are update with the leftover resources The ESCD Extended System Configuration Data is updated with the new configuration settings PnP Problems After Windows 95 was out problems with PnP became apparent Stubborn IRQ assignments PnP could Plug not handle the complicated jobs and Pray Hot Swapping Hot Swapping is the act of connecting disconnecting a device without stopping the host operations Hot Swapping requires specially designed hardware and software Hot Swapping requires that both the OS and the connecting peripheral support it USB Universal



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