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Unexplained Magic Words in Addressing in FIRA (FIR Accelerator sample program)

Category: Software
Product Number: ADSP-215xx, ADSP-SC5xx
Software Version: CCES 2.10

Hi, I found a puzzling magic word in the FIRA sample program.

The addressing is logically summed to 0xA000000.

It like this:

   FIRA_TCB1[0]=    ((int)(FIRA_TCB2+12)>>2)    | 0xA000000;    // CP  Chain Pointer Register

I could not find the meaning of this word in the datasheet or HRM.

What on earth could this be? The sample code can be found at

ADSP-SC58x/2158x FIR Accelerator: Example code

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