NEC POWERMATE VE - SERVICE MANUAL 05-1996 Service Manual

Also see for PowerMate V100e: Service manual

Contents

NEC POWERMATE VE - SERVICE MANUAL 05-1996 Service Manual Manual pdf 25 page image

1-12 Technical InformationVideo MemoryThe system comes with 1 MB of on-board video DRAM, upgradeable to 2 MB. Thestandard 1 MB DRAM consists of two 256K by 16 DRAM devices soldered to the systemboard. The optional 1 MB of DRAM consists of two 256 KB by 16 modules that install intwo sockets on the system board.With the standard 1 MB of video DRAM, the video hardware supports the followingresolutions, colors, and refresh rates:n 1280 by 1024 pixels, 16 colors, 60 Hzn 1024 by 768 pixels, 16/256 colors, 60 Hz, 70 Hz, 75 Hz, and 85 Hzn 800 by 600 pixels, 16/256/64K colors, 56 Hz, 60 Hz, 72 Hz, 75 Hz, and 85 Hzn 640 by 480 pixels, 16/256/64K/16 million colors, 60 Hz, 72 Hz, 75 Hz and 85 HzWith 2 MB of video DRAM, the system supports the following additional resolutions,colors, and refresh rates:n 1280 by 1024 pixels, 256 colors, 60 Hz and 75 Hzn 1024 by 768 pixels, 64K/16 million colors, 60 Hz, 70 Hz, 75 Hz and 85 Hzn 800 by 600 pixels, 16 million colors, 56 Hz, 60 Hz, 72 Hz, 75 Hz, and 85 Hzn 640 by 480 pixels, 16 million colors, 60 Hz, 72 Hz, 75 Hz, and 85 Hz.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 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 thePentium processor. The bus supports burst modes that send large chunks of data across thebus, allowing fast displays of high-resolution images.The PCI-bus operates at half the Pentium’s processor speed, and supports memory transferrates of up to 105 MB per second for reads and up to 120 MB per second for writes,depending on processor configuration.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 pathto future technologies.