VisualDSP++ 4.5 Loader and Utilities Manual - Analog Devices

ADSP-2126x/2136x/2137x Processor Booting
tion. The loader utility generates a warning if the vector address 0x80004
for ADSP-2126x processors (0x90004 for ADSP-2136x/2137x processors)
does not contain NOP or IDLE.
� When
using VisualDSP++ to create the loader file, specify the
name of the customized boot kernel executable in the Kernel file
box on the Load page of the Project Options dialog box.
ADSP-2126x/2136x/2137x Processors Interrupt
Vector Table
If the ADSP-2126x, ADSP-2136x, or ADSP-2137x processor is booted
from an external source (PROM or SPI boot modes), the interrupt vector
table is located in internal memory (0x80000–0x800FF for ADSP-2126x
processors, 0x90000–0x900FF for ADSP-2136x/2137x processors). If the
processor is not booted and executes from external memory (no-boot
mode), the vector table must be located in external memory.
The IIVT bit in the SYSCTL control register can be used to override the
booting mode when determining the location of the interrupt vector table.
If the processor is not booted (no-boot mode), setting IIVT to 1 selects an
internal vector table, and setting IIVT=0 selects an external vector table.
If the processor is booted from an external source (any boot mode other
than no-boot), IIVT has no effect. The default initialization value of IIVT
is zero.
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