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Barrel Shifter
From SnesLab
The SA-1 has a barrel shift circuit that treats the Game Pak ROM as a bitstream.
The 65c816 also has a shifter connected to the ALU and 8-bit data bus.
Reference
- page 1-8-1 of Book II of the official Super Nintendo development manual
- Figure 1-8-3 on page 1-8-5 of Book II, lbid.
- Labiak, William. Figure 2.2: https://archive.org/details/Programming_the_65816/page/n43