PlayStation Development Network

Charles MacDonald wrote: ↑May 31st, 2014, 10:38 am If you are using a TTL RS-232 to USB converter (e.g. DLP-USB232R, FTDI UM232H, etc. which appears as a virtual COM port) to dump the CD BIOS, I've developed a command-line program that uploads the dumping program and saves the results. The source code and a Windows binary are available here:

http://cgfm2.emuviews.com/new/pcd-05302014.zip

I've tried to make it easy to use at every step, so troubleshooting problems should be simple.

For dumping I did some things slightly differently; I connected 7.5V to pin 31 and 3.5V to pin 17 using a 10K-ohm resistor in series to limit current into these pins, instead of a direct connection. It's not strictly necessary however. Also on this particular PU-8 board there is a 4.7K ohm pull-up resistor to 3.6V on pin 31 on the component side of the board that should be removed when dumping. On the solder side it can be seen as a via prior to the test point.

For the RS-232 to USB converters mentioned, what worked for me was to configure them as being bus-powered (using 5V from the USB cable), and connecting the VCCIO pin to the PSX 3.6V supply and the ground pins to the PSX ground. There are probably other ways to power the converters that work as well.