Documentation

Pushes a copy of the accumulator on to the stack.

https://www.nesdev.org/obelisk-6502-guide/reference.html#PHA

Pushes a copy of the status flags on to the stack.

https://www.nesdev.org/obelisk-6502-guide/reference.html#PHP

Source: https://github.com/bugzmanov/nes_ebook/blob/785b9ed8b803d9f4bd51274f4d0c68c14a1b3a8b/code/ch3.3/src/cpu.rs#L486

Pulls an 8 bit value from the stack and into the accumulator.

https://www.nesdev.org/obelisk-6502-guide/reference.html#PLA

Pulls an 8 bit value from the stack and into the accumulator.

https://www.nesdev.org/obelisk-6502-guide/reference.html#PLP