From: "Roman Black"
> If you connect to the INPUTS in the par port,
> these normally have a fairly strong pullup
> resistor attached and you will need a very
> low series resistor, any values over 180 ohms
> will fail to pull the par port inputs low
> enough, 120 ohms is a good value.
>
> For the par port OUTPUTS just use a 1k or 2k2
> resistor between the par port output and your
> logic chip input.

I had 1k resistors between the port and the pic and got
random data. After changing to 470 ohms i got a reliable
data transmission. Maybe you need 470 to be able to
drive the cap. in some ports.
The strange thing was that that i could SEND reliable,
but when reciving data on the PC it was random.

Now my test program has sent more than 10 mil data bytes
and zero error bytes in return. And no timeouts.

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