Memory organization allowing single cycle pointer addressing...

Details Memory organization allowing single cycle pointer addressing... Memory organization allowing single cycle pointer addressing...

2007-12-04

2007-12-04

Ellis, Richard L. (Department: 2183)

Electrical computers and digital processing systems: processing

Processing control

Reexamination Certificate

active

10566514

ABSTRACT:
All pointer-based accesses require first that the value contained in a pointer register to be read and then that value be used as an address to the appropriate region in random access memory (RAM). As implemented today, this requires two memory read access cycles, each of which takes at least one clock cycle and therefore this implementation does not allow single cycle operation. In accordance with an embodiment of the invention, when an access is performed to pointer memory to read the contents of a pointer, it is the shadow memory that is actually read and that returns the pointer value. Since the shadow memory is made up of pointer registers, a read access involves multiplexing out of appropriate data for the pointer address from these pointer registers to form a target pointer address. This target pointer address is then used as an address to access RAM without the overhead of a clock, since the register access is purely combinatorial and does not require clock-phase related timing as does access to the RAM.

REFERENCES:
patent: 4245302 (1981-01-01), Amdahl
patent: 4926312 (1990-05-01), Nukiyama
patent: 5179716 (1993-01-01), Agrawal et al.
patent: 6058467 (2000-05-01), Broxterman et al.
patent: 6098160 (2000-08-01), Drake
patent: 6131108 (2000-10-01), Born et al.
patent: 2002/0042869 (2002-04-01), Tate
patent: 2002/0103979 (2002-08-01), Koga
patent: 2003/0028754 (2003-02-01), Sugimoto

Affiliated with

Also associated with

Rating

Memory organization allowing single cycle pointer addressing... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Memory organization allowing single cycle pointer addressing..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Memory organization allowing single cycle pointer addressing... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3893855