Java Card Volatile Memory Stack Allocation

The patent merges the OS stack and JCVM stack into a single shared memory region, eliminating the need for a separating heap structure. This allows both stacks to coexist and grow dynamically within the same memory space, maximizing volatile memory utilization while maintaining manageable complexity through structured memory allocation protocols.

The patent implements dynamic memory allocation where the boundary between OS stack and JCVM stack is not fixed but can adjust based on runtime requirements. This dynamic approach allows the memory manager to allocate more space to either stack as needed, optimizing memory usage patterns rather than relying on static pre-allocation.

By consolidating OS stack and JCVM stack into a single shared memory region, the patent eliminates wasted memory space that would exist between separately allocated stacks. This merging allows the device to achieve the required storage capacity using less total volatile memory, thereby reducing costs by enabling the use of lower-cost RAM chips.

The patent changes the memory allocation parameters from fixed separate allocations to dynamic shared allocation. This parameter change optimizes the total memory footprint required, allowing the system to achieve necessary storage capacity with reduced memory size and lower associated costs.