TMC LI7WM, User Manual

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Chapter 3 Hardware Description
13 LI7WM User’s Manual
3.9 Interrupt Request (IRQ) Lines
There are a total of 15 IRQ lines available on the motherboard.
Peripheral devices use an interrupt request to notify the CPU for the
service required. The following table shows the IRQ lines used by the
devices on the motherboard:
Level Function
IRQ0
System Timer Output
IRQ1 Keyboard
IRQ2 Interrupt Cascade
IRQ8 Real Time Clock
IRQ9
Software Redirected to Int 0Ah or PCI Slot Int#
IRQ10 Reserved or PCI Slot Int#
IRQ11 Reserved or PCI Slot Int#
IRQ12 PS/2 Mouse or PCI Slot Int#
IRQ13 Co-Processor
IRQ14 Primary IDE
IRQ15 Secondary IDE
IRQ3 Serial Port #2
IRQ4 Serial Port #1
IRQ5 Parallel Port #2 or PCI Slot Int#
IRQ6 Floppy Disk Controller
IRQ7 Parallel Port #1
3.10 Onboard VGA
The Intel 810E chipset is the result of new design approach to optimize
the shared memory architecture while maintaining the cost benefits of
integration through Direct AGP and Dynamic Video Memory
Technology.
a. Direct AGP
Direct AGP delivers AGP class graphics performance to PCs at
reduced cost. Rather than simply combining two semiconductor cell
libraries for component reduction, Intel architects combined the 2D and
3D video capabilities with the memory control unit. This functional
overlap within the Graphics and Memory Controller (Intel® 82810E)
enables Direct AGP. Direct AGP provides an integrated graphics part
with the capability to make direct memory set-up calls (similar to those
associated with standard AGP protocol) to system memory. Direct AGP
calls can dynamically allocate and de-allocate system memory for
complex 3D textures, preserving the benefits of standard AGP add-in
solutions.