defzonoc wrote:
parallel is easy and if you get a real oldie like my apple 2e you can make a eeprom programmer EASY plus the guy talkin bout breadboardin a comp is silly your cpu is not TO fast as you dont have to run it at top speed now do you?
You don't have to run a 14MHz part at 14MHz. You can run it at 1MHz.
But the chip is engineered for 14MHz, so its transistors swings its voltages high or low with
very fast slew rates.
Those high slew rates takes high signal bandwidth (hundreds of MHz, if you must know -- just look at the signal in a spectrum analyzer). The faster the slew rates, the greater the signal bandwidth, and thus, the shorter the wavelength of RF the signals give off. So,
* With shorter wavelength, you need shorter runs to other components, lest your signal traces become
antennas for adjacent signal paths.
* With higher frequencies, capacitance and inductance becomes an issue because now your signal traces are
natural low-pass filters. If your signals happen to use frequencies greater than the natural filter's cutoff frequency, you lose signal cohesion, which prevents the chips from communicating properly, leading to hard to diagnose faults.
So, before you call me or Garth "silly," I strongly encourage you to either research the matter, or better yet to build your own computer, before issuing slurs and ad hominems.
Thanks.