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| Vector Graphic 48K Dynamic RAM
The Vector Graphic 48K Dynamic Memory Board provides 49,152 8-bit
bytes of random access memory, using 24 16K dynamic memory chips.
It can be used in ANY S-100 bus computer using a Z-80 CPU board.
(Minor modifications may be necessary. It occupies the lower 48K of memory, i.e. beginning at 0000H.
The Vector Graphic 48K Dynamic Memory Board is clearly a
breakthrough in cost effectiveness. This is accomplished by
combining compact inexpensive dynamic memory chips with the use of
the refresh provisions of the Z-80 CPU. The most recent static RAM
boards cost considerably more, take up more space, and requre more
power. Other dynamic memory boards use complex support logic on the
board, rather than the built in features of the Z-80.
In addition to the above features, the Vector Graphic Dynamic Memory
Board has proven to be remarkably reliable. Considerable attention
was given during design of the board to the elimination of noise.
It features a gridded ground plane designed to reduce noise.
Accepted design practice was observed in structuring grounds, power
supply, and bypass.
48K Dynamic RAMImage provided courtesy of www.vectorgraphics.org.uk/
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