> I could probably simulate a turing machine on a TI-81 graphing calculator depending on if it fit in memory.
Well of course. A TI-81 is "a computer" in the layman's sense of the term. It has a general purpose Zilog z80 processor that can be programmed by the end user with a BASIC dialect, and (recently, with a exploit discovered in TI's software on it) with z80 assembly.
Pointing out that a TI-81 is Turing equivalent is like pointing out that an iPhone is Turing equivalent. It was never pretending not to be.
Well of course. A TI-81 is "a computer" in the layman's sense of the term. It has a general purpose Zilog z80 processor that can be programmed by the end user with a BASIC dialect, and (recently, with a exploit discovered in TI's software on it) with z80 assembly.
Pointing out that a TI-81 is Turing equivalent is like pointing out that an iPhone is Turing equivalent. It was never pretending not to be.