Memory mapping and special write detection in a system and metho

Details Memory mapping and special write detection in a system and metho Memory mapping and special write detection in a system and metho

1991-04-02

1994-04-05

Lee, Thomas C.

Boots, shoes, and leggings

395200, 395375, 395600, 3642323, 3642594, 364259, 36426081, 3642604, 3642611, 364261, 364DIG1, G06F 9455

Patent

active

053013026

ABSTRACT:
The system and method of this invention simulates the flow of control of an application program targeted for a specific instruction set of a specific processor by utilizing a simulator running on a second processing system having a second processor with a different instruction set. The simulator reduces the number of translated instructions needed to simulate the flow of control of the first processor instructions by detecting, at the time of a store to memory, whether an instruction, data, or video is being updated. If the memory location that is being updated contains an instruction, the simulator takes additional steps to guarantee the correct execution of the modified instruction. If the simulator determines at the time of a store that the memory location being modified is data, the simulator needs to take no additional steps.

REFERENCES:
patent: 4302820 (1981-11-01), Struger et al.
patent: 4370709 (1983-01-01), Fosdick
patent: 4393443 (1983-07-01), Lewis
patent: 4531215 (1985-07-01), Ladewski et al.
patent: 4633417 (1986-12-01), Wilburn et al.
patent: 4638423 (1987-01-01), Ballard
patent: 4638426 (1987-01-01), Chang et al.
patent: 4685057 (1987-08-01), Lemone et al.
patent: 4727480 (1988-02-01), Albright et al.
patent: 4794522 (1988-12-01), Simpson
patent: 4805095 (1989-02-01), Armstrong et al.
patent: 4812975 (1989-03-01), Adachi et al.
patent: 4839797 (1989-06-01), Katori et al.
patent: 4841476 (1989-06-01), Mitchell et al.
patent: 4847805 (1989-07-01), Ishii et al.
patent: 4873628 (1989-10-01), Omori et al.
May, C., "Mimic: A Fast System/370 Simulator:, SIGPLAN 1987, Proceedings of the ACM SIGPLAN '87 Symposium on Interpreters and Interpretive Techniques", Jun. 1987, 14 pages.
J. N. Brown, "Memory Mapping Device for the IBM Personal Computer", IBM Technical Disclosure Bulletin, vol. 27, No. 10A, Mar. 1985, pp. 5860-5862.
R. J. Cooper et al, "Microprocessor System Initialization Controller", IBM Technical Disclosure Bulletin, vol. 28, No. 9, Feb. 1986, pp. 3730-3733.
Graham, C., "Amiga's Trump Card: IBM PC Emulation", AmigaWorld, vol. 1, No. 2, Nov./Dec., 1985, pp. 34-35.
"SoftPC", Insignia Solutions, Inc., ISI SoftPC Data Sheet Rev., 3.0, Jan. 1987, 8 pages.
Warner, E., "Unix-Based Workstations to Run DOS", Info World, Jul. 6, 1987, p. 8.
J. J. McNeley, V. M. Milutinovic, "Emulating a Complex Instruction Set Computer with a Reduced Instruction Set Computer", IEEE Micro, vol. 7, #1 Feb. 1987, pp. 60-71.

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