slashdotted - home built turing machine

Ben bfranchuk at jetnet.ab.ca
Sat Mar 27 19:44:42 CDT 2010


Tony Duell wrote:

> If I was doing it, I'd use a RAM to hold a lookup table (say 64K, with
> the 16 address lines being the 8 bits of the current state and the 8 bits
> of the character from the 'tape'), Output from the RAM is the next state
> number (8 bits), character to write (8 bits), whether to wite the
> character to the 'tape', incremebnt/decrement 'tape postion'. Then an 8
> bit latch to store the current state, a large RAM and address counter to
> simulate the 'tape' and a small amount of control logic.

  I think BYTE had a version like that, when they where not a PC review
magizine. Still that type of machine is better 'visible' machine than 
something
you would use day to day. Any kind of memory was the problem back then, 
not computing logic.

> -tony
>
Ben.




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