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Emulating the ’C82’s Parameter RAMs
3-5
Prototyping ’C82 Code on the ’C80
3.3.2 Emulating the MP Parameter RAM
The remaining issue is how to emulate the ’C82’s 4096-byte MP
parameter RAM. The last half of the memory address block occu-
pied by this RAM is unpopulated on the ’C80. The ’C80’s PP2 pa-
rameter RAM can be mapped into this space and accessed via
a pointer. This approach works only if the application allows two
noncontiguous blocks of ’C80 RAM to be used to emulate a
single block of MP parameter RAM.
This technique uses all 2048 bytes of the ’C80’s PP2 parameter
RAM as general-purpose RAM. As long as PP2 remains halted,
the hardware functions that can write to the parameter RAM re-
main inactive and do not alter the contents of the RAM.
Содержание TMS320C80
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