Transfer processor with transparency

Details Transfer processor with transparency Transfer processor with transparency

1994-03-08

1996-09-24

Coleman, Eric

Boots, shoes, and leggings

3642597, 364259, 364260, 364DIG1, G06F 1300

Patent

active

055600301

ABSTRACT:
Data processor with a transparency detection data transfer controller. Transparency register stores transparency data. Source address controller calculates source addresses for recall of data to be transferred. A comparator compares recalled data to stored transparency data and indicates whether data to be transferred is to be written to memory. Destination address controller writes data to be transferred into memory at calculated destination addresses if the comparator indicates data to be transferred is to be written to memory. The recalled data is stored in a source register for comparison. In the preferred embodiment data is not written into memory if it matches the transparency data. The transparency register may store a multiple of the minimum amount of data to be transferred. The data to be transferred is organized into data words having a selected size. This selected size is an integral multiple of a minimum amount of data to be transferred. The comparator includes plural data comparators, where each data comparator compares the minimum amount of data to be transferred with a corresponding part of the transparency data. A multiplexer receives these comparison signals and an indication of the selected data size. The multiplexer provides indications of whether the data to be transferred is to be written to memory equal to the number of times the data words of the selected size fit within the transparency register. The selected data size may be a byte, a halfword, a word (32 bits) and a double word and the transparency register stores 64 bits.

REFERENCES:
patent: 4639765 (1987-01-01), D'Hont
patent: 4656597 (1987-04-01), Bond et al.
patent: 4665495 (1987-05-01), Thaden
patent: 4689807 (1987-08-01), Maan
patent: 4718024 (1988-01-01), Guttag et al.
patent: 4752893 (1988-06-01), Guttag et al.
patent: 4769640 (1988-09-01), Sato
patent: 4809201 (1989-02-01), Keklak
patent: 4812988 (1989-03-01), Duthuit et al.
patent: 4893116 (1990-01-01), Henderson
patent: 4920483 (1990-04-01), Pogue et al.
patent: 5140687 (1992-08-01), Dye et al.
patent: 5165103 (1992-11-01), Takeda et al.
patent: 5179642 (1993-01-01), Komatsu
patent: 5197140 (1993-03-01), Balmer
patent: 5212777 (1993-05-01), Gove et al.
patent: 5226125 (1993-07-01), Balmer et al.
patent: 5239654 (1993-08-01), Ing-Simmons et al.
patent: 5249266 (1993-09-01), Dye et al.
Microprocessor Report, Slater, Michael, "IIT Ships Programmable Video Processor," vol. 5, No. 20, Oct. 30, 1994, pp. 1,6-7, 13.

Affiliated with

Also associated with

Rating

Transfer processor with transparency does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Transfer processor with transparency, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transfer processor with transparency will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1948298