This is image-2-of-DSP-external-RAM in view mode; [Up]
Date: Sun 12-Dec-1989 20:42:44 From: Unknown Subject: image 2 of DSP external RAM The array processing library seems to want to handle complex numbers by storing all the real values and then all in the imaginary values in flat external memory space. This approach is fine unless you want to use any of the features of the 56000, in which case you are in trouble. Motorola defines an X and Y memory space for real and imaginary numbers so that one address accesses an entire complex number. Next seems to want to support this mode but hasn't documented how to set the registers in port c of the DSP to do this. In appendix H of the manual there are a few comments to the effect that when A15 is high that X/Y~ is connected to A12, thus making 4k complex RAM out of 8k real RAM. Has anybody seen this work? raj b apte >From: mike@relgyro.stanford.edu (Mike Macgirvin)
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