✍ Scribed by C.L. Silk; G.W. Smethurst
No coin nor oath required. For personal study only.
This paper describes the design of a high-speed dual-port memory system being deveIoped by the University of Keele Computer Centre. This technique is generally used on high performance application specific boards. We have generalized it to produce a 64k dynamic RAM board with two independent system buses. The memory is capable of supplying data at 4 Mbyte/s on each bus, but due to difficulties in incorporating sticient bus lines, the full set of 32 data lines is only available on one bus and 16 data lines are available on the other.
The initial application for this memory is to support an 80 characters/line video display together with high resolution graphics. The access to data through independent system buses permits high performance applications like music and speech synthesis to be developed without the need to incorporate special bus contention logic. Dualport memory offers a particularly simple way of configuring multiprocessor systems. The application of this technique to a dual processor controller for a telescope is described.
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