The 6502 Rotate Right Myth

Many people think that the first revision of the famous 6502 microprocessor had a bug in its rotate right instruction. But is that really true? The article about undocumented 6502 instructions: https://www.masswerk.at/nowgobang/2021/6502-illegal-opcodes Browse through the Rev A 6502 chip yourself: https://siliconpr0n.org/map/mos/6502a/mz/ The MOnSter 6502: https://monster6502.com/ Catch up with me on Mastodon: https://mastodon.social/@tubetime Or on Twitter: https://twitter.com/TubeTimeUS Chapters: 00:00 The Myth 03:25 Shift vs. Rotate 04:09 Smashing a Rare Chip (and the Myth!) 06:59 Adding ROR 08:50 Conclusion: It's a Missing Feature!