Apparatus and method for next address generation in a data proce

Details Apparatus and method for next address generation in a data proce Apparatus and method for next address generation in a data proce

1979-01-03

1982-01-05

Thomas, James D.

Boots, shoes, and leggings

G06F 926

Patent

active

043097537

ABSTRACT:
A data processing system having a control store storing firmware words for controlling the system, logic for executing logical operations on input data, including the performing of a first and second data processing routine, and apparatus for addressing the control store to access selected firmware words to control the execution of desired logical operations on the input data. The system operates in a particular mode of control to suspend the operation of the first routine in order to execute the second routine whereby the logical apparatus includes a register for saving a return address associated with the last instruction of the first routine. When the system terminates the second routine and restores the first routine to operation, the contents of the save register are employed, with the lowest order bit thereof inverted, to access the control store to fetch the firmware word used to reenter the first routine.

REFERENCES:
patent: 3292155 (1966-12-01), Neilson
patent: 3348211 (1967-10-01), Ghiron
patent: 3571804 (1971-03-01), Hemdal et al.
patent: 3593306 (1971-07-01), Toy
patent: 3665404 (1972-05-01), Werner
patent: 3693162 (1972-09-01), Spangler
patent: 3980991 (1976-09-01), Mercurio
patent: 4001783 (1977-01-01), Monahan et al.
patent: 4020471 (1977-04-01), Woods et al.
patent: 4097920 (1978-06-01), Ozga
patent: 4107774 (1978-08-01), Joyce et al.
patent: 4156900 (1979-05-01), Gruno et al.
patent: 4159520 (1979-06-01), Priotse
patent: 4173782 (1979-11-01), Dixon
patent: 4181942 (1980-01-01), Forster et al.
patent: 4197579 (1980-04-01), Otis, Jr. et al.

Affiliated with

Also associated with

Rating

Apparatus and method for next address generation in a data proce does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus and method for next address generation in a data proce, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for next address generation in a data proce will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1847234