This code appears in the following versions (click to see it in the source code): Disc (docked), 6502 Second Processor and Master Code variations between these versions are shown below. Code variation 1 of 3A variation in the comments onlyTap on a block to expand it, and tap it again to revert. Docked, 6502SPMaster Name: stack Name: stackpt Type: Variable Category: Save and load Code variation 2 of 3A variation in the comments onlyTap on a block to expand it, and tap it again to revert. Docked, 6502SPMaster Summary: Temporary storage for the stack pointer when switching the BRKV handler between BRBR and MEBRK Summary: Temporary storage for the stack pointer when jumping to the break handler at NEWBRK Code variation 3 of 3A variation in the labels onlyTap on a block to expand it, and tap it again to revert. Docked, 6502SPMaster.stack EQUB 0 .stackpt EQUB &FF