Gecko 5 volts Again

Since I don't have a game port for 5 volts I got this from the PC's
power supply. However now that I'm installing 12 volt relays for
spindle, coolant etc I have decided to use a seperate 12 volt power
supply mounted in my controller box for 12 and 5 volts. My question
is, .. how much current can pins 16 though 25 of the printer port
handle ? Are they tied together? Only the 5 volt circuit will use this
ground.

Frank