Difference between revisions of "Undocumented SDBD Behavior"

Revision as of 22:15, 11 January 2005

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SDBD + indirect through R6: Seem to recall results in two stack reads from top of stack, and ultimately decrements stack pointer once.
SDBD + indirect while using same register as register argument. (e.g. SDBD; ADD@ R4, R4) CPU uses an interesting blend of old, new register values.
SDBD + direct: Need to dig up Carl Jr's description of the CPU's behavior here. It's an interesting blend of Direct and Indirect access modes.

Other?

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