Z80-A CPU card - for the Polyformant

5-28 - elektor may 1982 Z80-A CPU car ... for the Polyformant As the Z80 is stil) one of the most popular microprocessors around, it is high time the device was mentioned in Elektor. However, that is not the only motive behind this article, for the Z80-A CPU is the heart of the control circuitry for the new Elektor synthesiser. The board is compatible with the Elektor microprocessor bus system, so that the Eurocard collection will now be accessible to Z80 users. U. GoÃàtz and R. Mester of RAM is required in this application 1C18 and IC19 (see figure 1) may be omitted. It is not absolutely necessary to position the memory ICs and their corresponding address decoders on the CPU board. Large amounts of software can best be stored on a separate (EP)ROM board, such as the Elektor RAM/EPROM card (ESS 80120). One or two minor modifi- cations to the latter are required first, however, details of which are provided elsewhere in this issue. Buffers Any self-respecting CPU board will of co...