Dr. CockroachEver have one of those days where nothing goes right? I have been rewiring my program counter and using a circuit that is known good by a number of sources and yet no matter what I do, I can not get it to do anything. Just sits there mocking me. Oh well, that's the price I pay for taking on this project. Never fear, I will figure it out. Transistors and diodes test good. Wiring checks out and solder joints making good contact. I will survive , I will win :-)
January 21, 2017 - Trouble in paradise
A project log for The Cardboard Computer - IO is my name
My goal is a 4-bit CPU using recycled cardboard substrate and Diode Transistor Logic. This is an educational platform for me.
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Just move your recycling bin within view of the computer. Being cardboard, the machine will sense the threat and start behaving properly :-)
Keep at it; I always feel a little let-down when something works the first try.
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I think that I will use a shredder as the threat ;-)
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More efficient at coercing bugs out of a circuit : a 'scope :-)
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I guess I got a bit cocky when the Adder/ALU worked without error the first time :-)
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Hey Mark, its just metal and cardboard my man, don't sweat :}
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Still no luck? If you can't make any traction, and want to post a schematic, I could throw it into LTspice and simulate it as a double-check. At least then you would have narrowed it down to a possible bad part or construction error.
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Oh there is some headway :-) Just that my mind races ahead of the rest of me and I lose focus. I guess that with this project there are way too many irons in the fire. If it comes down to using LTspice then I'll yell for help :-) but I truly want to fuss and tease this a bit more on my own. I have this weekend off and plan on joining what I do have working to each other and see how well the parts will "talk" as a whole :-) Clock - pulser - fsm - decoder - data bus - dmux and then register. This should be interesting :-)
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