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Stack Pointer: Difference between revisions
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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. | 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 are [[TCS]] and [[TXS]]. | On the [[65c816]], the only two instructions that modify the stack pointer directly are [[TCS]] and [[TXS]]. | ||
=== Reference === | === Reference === | ||
Revision as of 10:14, 7 December 2023
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.
Reference
- page 3-8-4 of Book I of the official Super Nintendo development manual