Most of the information is already available from:

http://gabezing.sytes.net/LC475-40Mhz-E.html

1) Perform the resistor swap as indicated to bring the system to 33 MHz

(this decouples some other clock, I guess; the system won't be stable at

40 MHz without doing this)

2) Get a 20 MHz oscillator and connect pin 7 (or the equivalent) to pin 7

of the 31.33 MHz oscillator on the rear right corner of the motherboard;

also connect pin 14 to pin 14. These are ground and +5 volts, respectively

(20 MHz oscillators can be bought from, say, Digikey(.com))

3) Remove R93 from the back of the motherboard. Then run a short wire from

pin 8 of the oscillator to the R93 pad that is closer to the middle of the

motherboard.

That's it! I know this is basically what that web page says, but I hope my

language is a little clearer.

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