LPT printer port

[IVIorse]

Hi I have written a program which uses the LPT port to control a circuit. I use the out port.vi to control pin two(toggle on and off). This works fine on my desktop computer but when I try it on my laptop I can't seem to get anything to happen. All data pins on my laptop-LPT port are always high. I have already made sure to adjust the address of the LPT for each computer. Any ideas which could lead me in the right direction? Its frustrating it'll work fine on one machine but not on another. I can provide the simple code if necessary. Thanks

[LabViewGuruWannabe]

Howdy,

Is your printer port on the laptop set to the same mode as the desktop? (Standard SPP, Enhanced EPP or Extended ECP?) You might have to go into the laptop's BIOS to change the printer port setting.

More info here: http://www.beyondlogic.org/ecp/ecp.htm

Good luck!

- Greg

[IVIorse]

how do i access the BIOS? My desktop lpt port is ECP, how do i change my laptop?

[smercurio_fc]

When you boot the laptop you can hit a key to get into the BIOS. This is usually displayed right when you first turn it on. It's usually F2 or the Del key - it depends on who made your laptop. Check your laptop's manuals for more information.