Re:6502 Illegal Opcodes in the Siemens PC 100 Assembly Manua...
by RetroSpark on Friday May 09, 2025 @09:21AM
(#43936431)
> On execution, 16-bit Thumb instructions are transparently decompressed to full 32-bit ARM instructions in real time, without performance loss.
That quote is from the ARM7TDMI manual - the CPU used in the Game Boy Advance, for example. I believe later processors contained entirely separate ARM and Thumb decoders.
That quote is from the ARM7TDMI manual - the CPU used in the Game Boy Advance, for example. I believe later processors contained entirely separate ARM and Thumb decoders.