1-12 Technical InformationTable Section 1-9 Video Resolutions and FrequenciesResolutionMemoryRequired Color Video Clock (Hz) Horiz Sync (KHz)1280 x 1024 2 MB 256 60 64.01280 x 1024 2 MB 256 70 74.61280 x 1024 2 MB 256 74 81.1(I) Interlaced.ISA/PCI-Bus BackboardThe 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 minitowercomputer provides three ISA, one shared ISA/PCI-bus slot, and PCI-bus slot.ISA BusThe system board uses the ISA bus for transferring data between the processor and I/Operipherals and expansion boards. The ISA bus supports 16-bit data transfers and typicallyoperates at 8 MHz. ISA expansion slot connector pin assignments are provided inAppendix A.PCI Local BusThe industry-standard PCI-bus is a highly-integrated I/O interface that offers the highestperformance local bus available for the Pentium processor. The PCI-bus supports burstmodes 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 tofuture technologies. PCI expansion slot connector pin assignments are provided inAppendix A.PCI Auto ConfigurationThe system comes with a PCI auto configuration utility that operates in conjunction withthe 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.
