Access verification arrangement for digital data processing syst

Boots – shoes – and leggings

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

G06F 1214, G11C 700

Patent

active

048211699

ABSTRACT:
A bus interface unit for connecting a processor to a memory to form a digital data processing system. The storage locations in the memory are grouped in pages each having a selected access rights mode which regulates access to the data stored therein by the programs, each of which has a selected access rights mode. The access rights are assigned on a page by page basis. If an access request from a program requires transfers to multiple locations, the processor will normally perform an access verification on the first location while it is in the first transfer operation, and then perform the transfer operation and successive transfer operations. If the transfer operations require accesses to separate pages in memory, a microtrap operation is performed and the processor performs access verifications on locations in both pages before performing any transfers.

REFERENCES:
patent: 3893084 (1975-07-01), Kotok
patent: 3916385 (1975-10-01), Parmar
patent: 4016545 (1977-04-01), Lipovski
patent: 4300192 (1981-11-01), Couleur et al.
patent: 4386399 (1983-05-01), Rasala
patent: 4580214 (1986-04-01), Kubo et al.
patent: 4581702 (1986-04-01), Saroka

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Access verification arrangement for digital data processing syst does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Access verification arrangement for digital data processing syst, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Access verification arrangement for digital data processing syst will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-670871

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.