Difference between revisions of "Stack Mode"
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Revision as of 18:11, 16 January 2005
Stack Mode is simply Indirect Mode via register R6, the stack pointer. GI documentation mentions stack mode separately for three reasons:
- Reads via R6 decrement R6 prior to using its value. No other indirect reads have that behavior.
- Stack Mode accesses reads take 3 extra cycles.
- The CP1610 does not officially support SDBD with Stack Mode.
Stack Mode instructions have the same encoding as Indirect Mode and Immediate Mode instructions.
