Computer Interfacing

Conversion between digital and analogue

either the computer is doing something else — in effect

multi-tasking — or it is doing nothing, such as waiting in

a loop for the ready signal to appear on the status line.

In the former case a special arrangement has to be made

for the computer to leave its other work at the end of

conversion in order to accept the converted data. This

can be done by using an interrupt procedure something

that will be considered in detail in the next chapter of

this book.

The above discussion sets the background for a look at

some of the variety of circuits used to convert, either

way, between the analogue and digita ...