Figure 10-14 illustrates how an 8203 and thirty-two 2164s could be used to construct a 256K-byte memory module for a maximum mode 8086 MULTIBUS system. This is an Intel design which assumes that the data and address buses are inverted and therefore uses 8283s and 8287s to interface to these buses instead of 8282s and 8286s.


A way of reducing the number of chips needed in the support circuitry for dynamic RAM is to put a set of refresh logic on each memory device, thus permitting the device to refresh itself.Such a device is called an integrated RAM and except for memory accesses sometimes being held up by refresh cycles, the device appears to the user to be a static RAM.An example of this approach is the Intel 2186/7, which is an 8K x 8 integrated RAM.