Byte vol.12 №6 June 1987

FEATURES
First Impressions:
The IBM PS/2 Computers………………….100
by the BYTE Editorial Staff
The Personal System/2—including a 32/16-bit bus, new operating systems, and new graphics systems—redefines IBM’s microcomputer standards.
The PS/2 Model 80: IBM’s first 80386-based computer.
Product Description: Microsoft’s New DOS………………………….116
by Eva White and Richard Grehan
With OS/2, Microsoft makes a break for the future while remaining true to the past.
Ciarcia’s Circuit Cellar:
Build a Gray-Scale Video Digitizer, Part 2……..129
by Steve Ciarcia
An imaging system with remarkable features for the price.
Programming Project: A Contouring Subroutine………………………143
by Paul D. Bourke
Use this BASIC program to represent any three-dimensional surface on a flat plane.
Programming Insight: Polynomial Curve Fitter……155
by William G. Hood This BASIC program finds a polynomial function to fit a set of data points.
68000 Machines: Atari 520ST Projects…………….161
by Tim G. Hunkier
An interface board for the Atari ST cartridge port.
THEME: Computer-Aided Design
Introduction……………………………..173
Data Structures in CAD Software…………….177
by Larry Pfort miller A description of image types and their computer representation.
The CADcompiler…………………………..187
by Arthur W. Crooke A logic design tool with a twist.
Computer-Aided Routing of Printed Circuit Boards………………….199
by Stephen E. Belter An examination of Lee’s Algorithm and possible improvements.
IGES…………………………………….209
by Ralph J. Mayer One answer to the problems of CAD database exchange.
CAD for Building Chips…………………….217
by Steve Trimberger and Jim Rowson Silicon compilers and the automated building of VLSI circuits.
REVIEWS
Reviewer’s Notebook………………………227
by Cathryn Baskin
Beyond Turbo…………………………….229
by Wayne Rash Jr.
Two 12-MHz machines from PC’s Limited and Wells American.
Turbo-Amiga……………………………..235
by Warren Block
An Amiga peripheral that’s more like a high-performance clone.
Pick of the Litter……………………….238
by William H. Murray and Chris H. Pappas An overview of eight computer mice.