1-12 Technical Information
Table 1-5 Interrupt Level Assignments
Interrupt Priority
Interrupt Device
IRQ10*
USB (SCSI board for SCSI configurations)
IRQ11*
Video Board
IRQ12
Onboard mouse port (available if no PS/2 mouse)
IRQ13
Reserved, Math Coprocessor
IRQ14
Primary IDE
IRQ15
Secondary IDE if present, or else user-available
*These interrupts are selected and used by the installed expansion boards.
Plug and Play
The system comes with a Plug and Play BIOS that supports Plug and Play technology. Plug
and Play eliminates complicated setup procedures for installing Plug and Play expansion
boards. With Plug and Play, adding a Plug and Play expansion board is done by turning off
the system, installing the board, and turning on the system. There are no jumpers to set and
no system resource conflicts to resolve. Plug and Play automatically configures the board.
ISA Bus
The system board uses the ISA bus for transferring data between the processor and I/O
peripherals and expansion boards. The ISA bus supports 16-bit data transfers and typically
operates at 8 MHz. ISA expansion slot connector pin assignments are provided in
Appendix A.
PCI Local Bus
The 32-bit PCI-bus is the primary I/O bus for the system. The PCI-bus is a highly integrated
I/O interface that offers the highest performance local bus available for the Pentium II
processor. The bus supports burst modes that send large chunks of data across the bus,
allowing fast displays of high-resolution images.
The high-bandwidth PCI-bus eliminates the data bottleneck found in traditional systems,
maintains maximum performance at high clock speeds, and provides a clear upgrade path to
future technologies.
PCI expansion slot connector pin assignments are provided in Appendix A.
Summary of Contents for MT-2550-24874C
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