Boots – shoes – and leggings
Patent
1994-01-03
1996-07-23
Black, Thomas G.
Boots, shoes, and leggings
3642214, 3642218, 364228, 3642281, 3642286, 3642394, 3642463, 3642624, 3642625, 364270, 364DIG1, 395480, 395873, 395375, G06F 1300
Patent
active
055398960
ABSTRACT:
A system is provided including a host processor and an audio capture and playback adapter having a DSP co-processor. The adapter includes shared memory accessible from both the DSP and the host. A DSP program is periodically written to the shared memory by the host and executed by the DSP. A non ping-pong dual buffer technique is disclosed wherein alternately one buffer is executed by the DSP while the remaining buffer is updated or linked by the host. In one embodiment, two pointer variables are used, each indicating respectively which buffer is currently being executed by the DSP and which has been updated by the host. Initially both pointer A and pointer B point to buffer A containing the initial DSP code. Each time the DSP requires execution of the configurable program, it reads pointer B, copies it to pointer A, and then branches to the buffer pointer A points to. When the host begins to relink to a buffer, it first sets pointer B equal to pointer A, relinks into the opposite buffer as pointer A, and then sets pointer B to this opposite buffer. The host is thereby prevented from updating a buffer currently being executed by the DSP. Real time dynamic linking of code segments in a tightly coupled co-processing system is thereby provided.
REFERENCES:
patent: 4298954 (1981-11-01), Bigelow et al.
patent: 4333143 (1982-06-01), Calder
patent: 4562436 (1985-12-01), Coleman et al.
patent: 4658351 (1987-04-01), Teng
patent: 4667286 (1987-05-01), Young et al.
patent: 4694426 (1987-09-01), Mason
patent: 4791489 (1988-12-01), Polatnick
patent: 4791629 (1988-12-01), Burns et al.
patent: 4841437 (1989-06-01), Lubarsky et al.
patent: 4897780 (1990-01-01), Lakness
patent: 4991169 (1991-02-01), Davis et al.
patent: 5133062 (1992-07-01), Joshi et al.
patent: 5150456 (1992-09-01), Wu et al.
patent: 5163132 (1992-11-01), DuLac et al.
patent: 5167028 (1992-11-01), Shires
patent: 5247678 (1993-09-01), Littleton
patent: 5269012 (1993-12-01), Denio et al.
Decaluwe et al, "Interprocessor Communication in Synchronous Multiprocessor Digital Signal Processing Chips", IEEE Transactions on Acoustics, Speech, and Signal Processing, vol. 37, No. 12, Dec./1989, pp. 1816-1828.
Black Thomas G.
Carwell Robert M.
Choules Jack M.
International Business Machines - Corporation
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