Microcomputer having variable bit width area for displacement an

Details Microcomputer having variable bit width area for displacement an Microcomputer having variable bit width area for displacement an

1995-06-07

1999-11-23

Bowler, Alyssa H.

395561, G06F 922, G06F 930

Patent

active

059915455

ABSTRACT:
Herein disclosed is a microcomputer MCU adopting the general purpose register method. The microcomputer is enabled to have a small program capacity or a high program memory using efficiency and a low system cost, while enjoying the advantage of simplification of the instruction decoding as in the RISC machine having a fixed length instruction format of the prior art, by adopting a fixed length instruction format having a power of 2 but a smaller bit number than that of the maximum data word length fed to instruction execution means. And, the control of the coded division is executed by noting the code bits.

REFERENCES:
patent: 4858105 (1989-08-01), Kuriyama et al.
patent: 4947366 (1990-08-01), Johnson
patent: 5019968 (1991-05-01), Wang et al.
patent: 5050068 (1991-09-01), Dollas et al.
patent: 5050668 (1991-09-01), Dallas et al.
patent: 5193167 (1993-03-01), Sites et al.
patent: 5202967 (1993-04-01), Matsuzaki et al.
patent: 5233694 (1993-08-01), Hotta et al.
patent: 5241633 (1993-08-01), Nishi
patent: 5317740 (1994-05-01), Sites
patent: 5394529 (1995-02-01), Brown, III et al.
Kohn et al., Session 3: Floating Point Processors, WAM 3.6: A 1,000,000 Transistor Microprocessor, ISSC 89, Wednesday, Feb. 15, 1989, pp. 53-55.
Osborn et al., Osborne 16-Bit Microprocessor Handbook, Includes 2900 Chip Slice Family, Osborne/McGraw-Hill, 1981, pp. 1-1 to 1-5; 1-24 to 1-33; 4-1 to 4-4; and 4-35 to 4-45.
Tabak, D., RISC Systems, 1990, pp. 49-71.
"I860 Microprocessor Internal Architecture" Microprocessors and Microsystems, vol. 14, No. 12, Mar. 1990, pp. 89-96.
"Cache Organization to Maximize Fetch Bandwidth," IBM Technical Disclosure Bulletin, vol. 32, No. 2, Jul. 1989, pp. 62-64.
M68000, 16/32-Bit Microprocessor Programmer's Reference Manual, 1984, pp. 72, 77 and 80.
Osborne, 16-bit Microprocessor Handbook, 1981, pp. 7-30 to 7-38.

Affiliated with

Also associated with

Rating

Microcomputer having variable bit width area for displacement an does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Microcomputer having variable bit width area for displacement an, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microcomputer having variable bit width area for displacement an will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1232615