Archive for June, 2011

Disk II

June 6, 2011 Leave a comment

In 1977 Mike Markkula, like many users, was unhappy with the time it took to load data from the cassette interface. He made it a company goal to develop a disk system for the Apple II. After studying the Shugart documentation Woz found that he could avoid much of the complex circuitry needed to control a disk head by doing more work in software. In addition, by doing the board layout himself, Woz was able to reduce chip count even further. My Disk II card is an early production unit which is visible by the tin fingers on the card. The Disk II drive is serial #7461 and includes the rainbow ribbon cable that came with the early production units.

Categories: Apple II, Disk II

Apple 1 Software Library for iOS

June 5, 2011 Leave a comment

Recently I wrote an Application for iOS devices that can be used to load Apple 1 software through the cassette interface. One key benefit to this application is that is shows load and verify instructions for each program. I’m currently in the process of getting this added to the App Store.

Mimeo Apple Cassette Interface

June 5, 2011 Leave a comment

Today I built up Mike Willegal‘s Apple Cassette Interface for the Apple 1. Previously I was using the Obtronix interface, however Mike’s board is a more accure reproduction.