Analog Devices VisualDSP++ 3.5 Manual page 212

Memory Management Using Overlays
External Memory
Overlay 1
Overlay 2
Overlay 3
Overlay 4
Figure 5-1. Memory Overlays
the location in internal memory where overlay 2 is designated to run.
When
FUNC_D
ignated run-time memory.
The transfer is typically implemented with the processor's Direct Memory
Access (DMA) capability. The overlay manager can also handle advanced
functionality, such as checking whether the requested overlay is already in
run-time memory, executing another function while loading an overlay,
and tracking recursive overlay function calls.
5-6
FUNC_A
FUNC_B
FUNC_C
FUNC_D
FUNC_E
FUNC_F
FUNC_G
is required, the overlay manager loads overlay 3 into its des-
VisualDSP++ 3.5 Linker and Utilities Manual
Internal Memory
Main: call FUNC_H
call .plt_FUNC_A
OverlayManager
Overlay 1 and 2
Runtime Memory
Overlay 3 and 4
Runtime Memory
for 16-Bit Processors