Add Serial Port
Locate J1 on the Mainboard after removing it from the case. This should be a 4 pin unpopulated header. The easiest way to find this is to first find the CPU first, and then look near the corners for J1.
Attach the serial port
The manufacturer of the Kuro filled the jumper holes for the Serial port with solder. Removing the solder from the jumper holes on the Kuro board is simple.
- Press the tip of a 15 watt soldering iron with a good sharp tip (if the tip isn’t sharp use a file to sharpen it and tin the tip) into the hole from the back of the circuit board.
- When the solder is flowing nicely, get your mouth about 1" from the front of the board and blow hard into the wet solder while at the same time removing the solder iron. You will blow the solder out of the hole leaving a hole that you can easily put a wire through.
Single or Bi-directional Traffic?
To allow one-way serial port traffic (read only) you can just add the 4 pin header and be done. To enable bi-directional serial port activity, you must also add a 10K resistor as described below.
Enable Write Mode (optional)
This step is optional, but you might find that the serial port is more useful with bi-directional traffic. To enable write support across the serial port, remove the 10K ohm pullup resistor from R75 and solder this, or another 10K ohm pullup resistor (SMD package size is 0603 if you want to buy one), to R76.
The serial port signals from the processor are only 3.3V. For proper RS-232 5V signaling, an RS-232 level shifter needs to be added. These are very common in PDA serial cables also, but can be purchased from Compsys Bench or Digital Nemesis
Item Name: A232DBH3v Max232 3.3v ver. adapter assembled w/hood kit Item Number: A232DBH3v
As an alternative you can make the level shifter cable yourself: [http://www.type-g.com/index.php?plugin=attach