D/A converter for I/O bus

D/A CONVERTER FOR I/O BUS To further complete the range of plug-in I/O bus extensions, here is a programmable analogue output board Those many owners of a C64, C128, or MSX micro equipped with the I/O bus board wig no doubt, appreciate the flexibility of the present extension, which is based upon the use of a readily obtainable D/A converter chip. EE December 1986 by D Haehle The C64 I/O bus, along with an as- sociated digitizer board, was in- troduced in the May 1985 issue of Elektor Electronics, while an 8-bit I/O port appeared in the December 1985 issue. How the universal I/O bus is to be modified to suit operation with the MSX series of computers is detailed in the Elektor Electronics, January 1986. The present D/A converter features 8-bit resolution, buffered outputs, and a presettable output voltage span. It is, we believe, an extremely simple to build module which will enable programmers to put their computer into contact with the real (analogue) world. An 8-bit D/A convert...