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Stack Pointer

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The Stack Pointer on the SPC700 is 16-bit, but the upper byte is fixed by the hardware to be 0x01.

On the 65c816, the only two instructions that modify the stack pointer directly are TCS and TXS.

See Also

Reference

section 8.1.5 of page 3-8-4 of Book I of the official Super Nintendo development manual

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