Graphics Accelerator; Video Memory - NEC POWERMATE OFFICE 2513 Service Manual

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MPEG is a compression/decompression standard developed by the Motion Picture Experts

Group. MPEG produces full-screen 30-fps, broadcast-quality digital video. The video

controller architecture maximizes the motion video performance and removes bandwidth

bottlenecks to display multimedia data at its full speed.

Graphics Accelerator

The graphics accelerator is specifically designed for graphics-intensive operations, text and

color pixel amplification, and scrolling. The graphics accelerator provides 64-bit, ultra-high

performance for demanding True Color, High Color, and pseudocolor GUI and CAD

applications.

The accelerator minimizes bus traffic by off-loading the tasks normally performed by the

processor. The dedicated bit-block transfers (BitBLT) engine maximizes performance by

speeding the movement of large blocks of image data in video memory.

The PowerMate Office 2513/2516 Series systems come standard with 1 MB of on-board

video EDO DRAM. The standard 1 MB EDO DRAM consists of two 256 KB by 16 EDO

DRAM devices soldered to the system board.

The system is upgradeable to 2 MB with the addition of 1 MB of EDO DRAM. The

upgrade consists of two 256 KB by 16 modules that install in two sockets on the system

board.

The system is further upgradeable to 4 MB with the addition of 2 MB of video memory on

a video memory card.

With 1 MB of video EDO DRAM, the video hardware supports the following resolutions,

colors, and refresh rates:

1024 by 768 pixels, 16/256 colors, 60 Hz, 66 Hz, 70 Hz, 72 Hz, and 75 Hz

800 by 600 pixels, 16/256/64K colors, 56 Hz, 60 Hz, 72 Hz, and 75 Hz

640 by 480 pixels, 16/256/64K/16.8 colors, 60 Hz, 72 Hz, and 75 Hz.

With 2 MB of video EDO DRAM, the system supports the following resolutions, colors,

and refresh rates:

1024 by 768 pixels, 256/64K colors, 60 Hz, 66 Hz, 70 Hz, 72 Hz, and 75 Hz

800 by 600 pixels, 256/64K/16.8 million colors, 56 Hz, 60 Hz, 72 Hz, and 75 Hz

640 by 480 pixels, 16/256/64K/16.8/32 bit million colors, 56 Hz, 60 Hz, 72 Hz,

and 75 Hz.

Technical Information

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