APPLE COMPUTER INC. Apple II Serial Interface Card (A2L0008). Installation and Operating Manual. 1979

Cupertino, California: Apple Computer Inc., c.1979. Original printed technical manual issued for the Apple II Serial Interface Card (A2L0008), produced to accompany expansion hardware for the pioneering Apple II. Printed in the United States, the manual bears the imprint “© Apple Computer Inc… Printed in U.S.A. 3/79”, indicating a March 1979 production. Original stapled booklet. Some light staining and minor marks to covers and margins, but generally clean and complete internally.

The booklet provides detailed instructions for installing and operating the serial interface card within the Apple II system, enabling communication with external devices via RS-232 connections—such as printers, modems, and teletypes. Sections include installation procedures, operating parameters, interface commands, and technical appendices covering baud-rate timing tables, circuit diagrams, and assembly listings.

Produced during the formative years of personal computing, such documentation reflects Apple’s early expansion ecosystem and the practical realities of configuring hardware in the late 1970s. Surviving examples are increasingly sought after by collectors of early computing history, particularly those associated with the Apple II platform developed by Steve Wozniak under the direction of Steve Jobs.

A desirable piece of early Apple documentation from the formative era of personal computing.

[WR Tech]