An option card must meet certain power supply requirements. The option card cannot draw more than the specified current (Amps):

Supply voltage

Maximum current

+5 Volts

0.8 Amps

f 12 Volts

0.1 Amps

-5 Volts

0.05 Amps

-12 Volts

0.05 Amps

The option card must not interfere with options installed in the internal ports. For example, if you install an option card with a parallel port, you must assign that port as the secondary parallel port ($278) if the internal parallel port is the primary parallel port ($378). If you want the parallel port on the option card to be the primary parallel port, you must disable the internal parallel port by setting DIP switch SW2-9 to OFF. See “Setting the DIP Switches” in Appendix A for details.

WARNING

You cannot install an optional video card in the expansion slot; video cards interfere with the built-in video capabilities of the LT-286e. You cannot install an option card that supports a diskette drive, a hard disk drive, or an expansion box that supports multiple cards.

B-8 Installing Options