Omnimaga
Calculator Community => Other Calc-Related Projects and Ideas => TI Z80 => Topic started by: scienceaddict on May 01, 2013, 11:13:26 pm
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would it be possible to have a microcontroller control the amount of overclocking on the calculator, so by using a "smart" os or shell, you can tell it to overclock by x amount when opening program y. valid idea or complete rubbish?
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Depending on the calculator, the OS can do that on its own. My overclocked 83PSE has 4 speed modes, all of which can be accessed by sending different numbers to port 20h. It may be difficult to control with a microcontroller on other calculators because the clock speed changes with the capacitance, which would be difficult to change from a microcontroller.
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i was thinking of simply having multiple caps in place, and having the microcontroller operate trasisters that would otherwise be interupting their connection. dunno what variations in capacitance the extra hardware would cause, or if that would affect anything.
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The calculator already does that to give the four different CPU speeds, except it uses resistors instead of capacitors. The SMT soldering required to do what you suggest gave KermM a run for his money, and he has a master's degree in this stuff. If you desolder the capacitor and can't get a replacement installed, your calculator's CPU will not function. You're dealing with components with sub-millimeter sizes. You need special equipment and special skills to avoid breaking things.
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Possible yes for a skilled hacker. probable for the majority of users, not so much. normally just the base mod for over clocking is plenty. and i would stick with that if you are going to attempt this at all and i would be wary if you are.
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as i have a 84se, unless someone finds a way to do so with it explicitly, i wont be tryinng anything at all, but i do have a spare that i botched the ribbon cable on while debugging my speakers (crule iorny is they work almost flawlessly now) that i can experiment on using the tilp screen shot to veiw progress.