Bios; Interrupt Request Lines (Irq) - TMC AI5TT User Manual

3.4 BIOS

The BIOS on the AI5TT motherboard provides the standard BIOS
functions plus the following additional features:
1. ISA Plug and Play (PnP) Extension
Unlike PCI cards which are plug and play, ISA cards require setting
jumpers to resolve hardware conflicts. To make a computer system
PnP, an ISA PnP standard is established and supported by new OSes,
such as Windows 95. Under Windows 95, the motherboard BIOS must
have ISA PnP extension to support the new ISA PnP cards.
2. Power Management
The power management feature provides power savings by slowing
down the CPU clock, turning off the monitor screen and stopping the
HDD spindle motor.

3.5 Interrupt Request Lines (IRQ)

There are a total of 15 IRQ lines available on the motherboard.
Peripheral devices use interrupt request lines to notify the CPU for the
service required. The following table shows the IRQ used by the
devices on the motherboard.
Level
IRQ0
IRQ1
IRQ2
IRQ3
IRQ4
IRQ5
IRQ6
IRQ7
IRQ8
IRQ9
IRQ10
IRQ11
IRQ12
IRQ13
IRQ14
IRQ15
AI5TT Pentium Baby AT Motherboard User's Manual
Chapter 3 Hardware Description
Function
System Timer Output
Keyboard
Interrupt Cascade
Serial Port #2
Serial Port #1
Parallel Port #2
Floppy Disk Controller
Parallel Port #1
Real Time Clock
Software Redirected to Int 0Ah
Reserved
Reserved
Reserved
80287
Primary IDE
Secondary IDE
9