Acer Aspire E1-521 Acer Aspire E1-521 Notebook Service Guide - Page 39

System Interrupt Specification Hardware IRQ System Function IRQ0 High precision event timer IRQ1 Standard PS/2 Keyboard IRQ2 Cascaded IRQ3 AMD EHCI USB Controller (7808, 7808) IRQ4 AMD High Definition Audio controller(780D) Ethernet controller(1083) IRQ6 Diskette drive IRQ7* Parallel port IRQ8 High precision event timer IRQ9* Microsoft ACPI-compliant system IRQ10* ATI High Definition Audio controller(1314) AMD AHCI 1.0 SATA controller(7801) Atheros Network controller(0032) IRQ11 ATI VGA compatible controller(9809) AMD USB Controller(7812) AMD OHCI USB Controller(7807, 7807) Realtek Device Does Not Fit In Class Code(5209) IRQ12 ELAN PS/2 Port Smart-Pad IRQ13 Numeric data processor IRQ14 Primary IDE channel IRQ15 Secondary IDE channel NOTE: *Default configuration, audio possible configurations are IRQ5, IRQ7, IRQ9, IRQ10, or none. Hardware Specifications and Configurations 1-32