It was specifically unable to understand how Z80 register pairs work, where some instructions operate on the entire 16-bit pair, and others on single 8-bit registers. From there, it didn't understand the pointer arithmetic and commented it all wrong.
I then asked it to guess which specific machine the code might be for, but, without understanding the pointer arithmetic, that's hard.
I tried to help it by giving it leading questions about verifiable facts (not about code).
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