Address conversion apparatus accessible to both I/O devices and

Details Address conversion apparatus accessible to both I/O devices and Address conversion apparatus accessible to both I/O devices and

1995-05-31

1999-03-30

Gossage, Glenn

Electrical computers and digital processing systems: memory

Address formation

Address mapping

395846, G06F 1210

Patent

active

058902201

ABSTRACT:
In a computer system having an address converter for DMA (direct memory access), an address conversion apparatus in which a memory area to be accessed by the DMA can be accessed at high speed from a CPU. A "DMA address conversion area" is defined in a memory space, and address conversion means in the mode of accessing the DMA address conversion area is so constructed that, when the area has been accessed from the CPU, a physical address is generated in accordance with the address conversion routine of the DMA address conversion means or converter, so as to access a main storage. The memory area to be accessed by the DMA can be quickly accessed from the CPU without requiring such an operation as especially accessing the control ware of the address converter or producing the physical address under the management of a program run on the CPU.

REFERENCES:
patent: 4155119 (1979-05-01), De Ward et al.
patent: 4348720 (1982-09-01), Blahut et al.
patent: 4373179 (1983-02-01), Katsumata
patent: 4466056 (1984-08-01), Tanahashi
patent: 4491909 (1985-01-01), Shimizu
patent: 4495575 (1985-01-01), Eguchi
patent: 4602329 (1986-07-01), Ohtake
patent: 4812969 (1989-03-01), Takagi et al.
patent: 4849875 (1989-07-01), Fairman et al.
patent: 5109496 (1992-04-01), Beausoleil et al.
patent: 5193160 (1993-03-01), Tsubota

Affiliated with

Also associated with

Rating

Address conversion apparatus accessible to both I/O devices and does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Address conversion apparatus accessible to both I/O devices and , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Address conversion apparatus accessible to both I/O devices and will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1226134