Acer Altos 500 Altos 500 Service Guide - Page 50

4. Secure the card to the housing with a screw. When you turn on the system, BIOS automatically detects and assigns resources to the PCI devices. Installing ISA Cards Both PnP and non-PnP ISA cards require specific IRQs. When installing ISA cards, make sure that the IRQs required by these cards are not previously assigned to PCI devices to avoid resource conflicts. Follow these steps when installing ISA cards: 1. Remove all PnP cards installed in the system, if any. 2. Install non-PnP ISA cards. 3. Turn on the system. 4. Use Windows 95 or ICU to manually assign the appropriate IRQs to the cards. This ensures that BIOS will not use the resources assigned to the non-PnP ISA cards. 2-18 Altos 500 System Guide