by Stephen L. Childress from the July 1983 issue of Micro magazine (Note: The figures are not available for this article because they are impossible to read on my source.) The modularization of the I/O system allows OS-9 to enhance the standard I/O at run time, not assembly or patch time. Device names and addresses are not fixed by the operating system but, rather, the program may attempt I/O to any device name.

by Stephen L. Childress from the June 1983 issue of Micro magazine Unless you’ve been on sabbatical to Siberia of late you will have noticed the swell of interest in the Unix operating system software. Most new and all the old popular 16-bit computers are supporting Unix or one of the numerous look-alikes. Why all the furor? It seems at last we’ve begun to rethink computer programming and usage. Recognizing that software development is expensive and timeconsuming, we must exploit the falling cost of today’s hardware.

by Phil Daley from the June 1983 issue of Micro magazine The operating systems that I have seen available for the Apple use essentially the same read/write routines, but they have been modified or changed. All the disks created by any one system can be read by any other system if you know the procedure. Modifying disks to make them copyprotected (unreadable) is a different technique and a different topic. The Operating Systems covered in this article all use standard DOS 3.