The Art of Micro Design is not only for the micro enthusiast but also for the layman and, though rather technical in places, it begins where many introductory books end. It covers all the details on the hardware, and some of the software, involved in getting microprocessors up and running.

The author treats microprocessors as little black boxes into which instructions are put and out of which signals come. Starting with an overview of the various signals, three common processors are used (Z80, 6800, and 1802) to demonstrate various addressing modes and what these mean when attaching memory chips and other peripherals.

Sadly omitted, though, is indirect addressing as used on the 6502, 6809 upwards; a feature which should not have been ignored.

Other subjects are RAMs, ROMs, EPROMs, Bubble memories, and disks and how they are used as a means of storage. Then there's input/output possibilities, things like PIAs and VIAs, and how they are used to an extent where manufacturers' data sheets should post no problems. LEDs, video displays, keyboards, and voice synthesisers are among other subjects covered.

The whole field is dealt with almost up to degree standard (more so in some cases). It is very readable and useful for anyone who is either studying micros or has read the beginner's books and wants to know more.

Kenn Garroch