1-12 Technical Information
Table Section 1-9 Video Resolutions and Frequencies
Resolution
Memory
Required
Color
Video Clock (Hz)
Horiz Sync (KHz)
1280 x 1024 2 MB 256 60 64.0
1280 x 1024 2 MB 256 70 74.6
1280 x 1024 2 MB 256 74 81.1
(I) Interlaced.
ISA/PCI-Bus Backboard
The ISA/Peripheral Component Interconnect (PCI)-bus backboard provides ISA and PCI-
bus expansion slots. The backboard is plugged into a bus connectors on the system board.
The desktop computer provides three ISA and one shared ISA/PCI-bus slot. The minitower
computer provides three ISA, one shared ISA/PCI-bus slot, and PCI-bus slot.
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 industry-standard PCI-bus is a highly-integrated I/O interface that offers the highest
performance local bus available for the Pentium processor. The PCI-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.
PCI Auto Configuration
The system comes with a PCI auto configuration utility that operates in conjunction with
the system’s Setup utility. The utilities automatically configure interrupts, DMA channels,
I/O space, and other parameters to allow addition of PCI boards with minimal intervention.
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