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Statements

Subject Item
dbr:Device_control_register
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Device control register
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In computing, a device control register is a hardware register that controls some computer hardware device, for example a peripheral or an expansion card. Specific technologies use this terminology with a narrower meaning:
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dbr:PCI_Express dbr:Control_register dbc:Computing_terminology dbr:Hardware_register dbr:MultiProcessor_Interrupt_Controller dbr:Computer_hardware dbr:Interrupt dbr:Computing dbr:ISA_PNP dbr:Peripheral dbr:Bus_(computing) dbr:Expansion_card dbr:CoreConnect
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In computing, a device control register is a hardware register that controls some computer hardware device, for example a peripheral or an expansion card. Specific technologies use this terminology with a narrower meaning: * The ISA PNP specification divides the registers of a device in two categories: control registers and configuration registers. One of the device control registers defined by ISA PNP is (for example) the Activate register, which turns the card on or off. * The Device Control Register is also the name of a specific register in the PCI Express architecture. It has fields that (among other things) control what is the maximum read request size (in bytes) that the device can make. * Device Control Register (DCR) is also the name of an IBM proprietary bus. Its stated design goal is to "transfer data between a DCR master, typically a CPU’s general purpose registers, and the DCR slave logic’s device control registers". For example, the IBM MultiProcessor Interrupt Controller (MPIC) is connected up to four processors via a shared DCR bus, and in turn the MPIC handles up to 128 interrupt sources.
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