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Addresses $0050 through $044F are RAM locations. The location of the stack RAM is programmable. The 16-bit stack pointer allows the stack to be anywhere in the 64K-byte memory space which has provide a glitch to Crack MCU MC68HC908JL3 Flash Binary.

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NOTE:     For correct operation, the stack pointer must point only to RAM locations.

Within page zero are 176 bytes of RAM. Because the location of the stack RAM is programmable, all page zero RAM locations can be used for I/O control and user data or code.

When the stack pointer is moved from its reset location at $00FF out of page zero, direct addressing mode instructions can efficiently access all page zero RAM locations. Page zero RAM, therefore, provides ideal locations for frequently accessed global variables in the process of Crack Protected MC68HC08AZ60 Memory. Before processing an interrupt, the CPU uses five bytes of the stack to save the contents of the CPU registers.

During a subroutine call, the CPU uses two bytes of the stack to store the return address. The stack pointer decrements during pushes and increments during pulls.

NOTE:     Be careful when using nested subroutines. The CPU may overwrite data in the RAM during a subroutine or during the interrupt stacking operation.