A DMA controller is connected to a CPU in a work station. The controller includes a multiple byte memory address register (MAR), and a pointer register connected between the CPU and MAR. The pointer register is responsive to a command from the CPU to give the CPU successive access to the...http://www.google.de/patents/US5671384?utm_source=gb-gplus-sharePatent US5671384 - Work station with a DMA controller having extended addressing capability
