DMA controller with mechanism for conditional action under control of status register, prespecified parameters, and condition field of channel command

Invention: DMA controller with mechanism for conditional action under control of status register, prespecified parameters, and condition field of channel command

Year	Description
1994	Invention patented by Kevin M. Christiansen, David V. James, and Bruce E. Eckstein on November 15th, 1994. Abstract: A DMA controller capable of conditional action under the control of a status register, prespecified parameters, and a condition field of the channel command, and a DMA controller which returns status information to command entry locations that are reserved for this purpose are disclosed. The prespecified parameters may be held in a register having a mask field and a value field, and a test for conditional action may be a masked comparison of the status register and the value field. The condition field determines how the test result is interpreted and allows suppressing or forcing the conditional action during a command.
Source: selected by the editor from original sources.