General purpose memory access scheme using register-indirect mod

Details General purpose memory access scheme using register-indirect mod General purpose memory access scheme using register-indirect mod

1991-02-20

1994-11-22

Rudolph, Rebecca L.

Boots, shoes, and leggings

395400, 395425, 395800, 364247, 3642472, 3642551, 364DIG1, G06F 934, G06F 1200, G06F 1576

Patent

active

053676483

ABSTRACT:
A memory access scheme achieved using a memory address register and a register-indirect memory accessing mode eliminates write back collisions, long cycle time, and enhances system performance. During memory address generation operations, an arithmetic-logic unit (ALU) generates memory addresses from data in a general purpose register (GPR). Then, the memory addresses are written back to the GPR and a memory address register (MAR). During memory access operations, the MAR is accessed for the memory addresses to access a memory. Two approaches are provided. In a first approach, use of the MAR during the memory access operations is explicit. In a second approach, use of the MAR during the memory access operations is transparent. According to the second approach, a controller is provided to validate the MAR during the memory access operations.

REFERENCES:
patent: Re34052 (1992-09-01), Hester et al.
patent: 4056819 (1977-11-01), Lukas
patent: 4075688 (1978-02-01), Lynch, Jr. et al.
patent: 4208716 (1980-06-01), Porter et al.
patent: 4241397 (1980-12-01), Strecker et al.
patent: 4245304 (1981-01-01), Porter et al.
patent: 4339793 (1982-07-01), Marenin
patent: 4339796 (1982-07-01), Brereton et al.
patent: 4403284 (1983-09-01), Sacarisen et al.
patent: 4532587 (1985-07-01), Roskell et al.
patent: 4758978 (1988-07-01), Cruess et al.
patent: 4766566 (1988-08-01), Chuang
patent: 4907147 (1990-03-01), Saito et al.
patent: 4912636 (1990-03-01), Magar et al.
patent: 4935867 (1990-06-01), Wang et al.
patent: 5050068 (1991-09-01), Dollas et al.
patent: 5131086 (1992-07-01), Circello et al.
patent: 5175863 (1992-12-01), Jones, Jr.
patent: 5222240 (1993-06-01), Patel
patent: 5276820 (1994-01-01), Ikenaga et al.
Angiulli, J. M. et al. "Enhancements in Implementing Load Address." IBM Technical Disclosure Bulletin, vol. 23, No. 6, Nov. 1980, pp. 2401-2403.

Affiliated with

Also associated with

Rating

General purpose memory access scheme using register-indirect mod does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with General purpose memory access scheme using register-indirect mod, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and General purpose memory access scheme using register-indirect mod will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1997525