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Fascinating original testing set-up used by Apple Computer’s Macintosh development team for work on the original Macintosh motherboard, consisting of an Apple II Plus computer, Model No. A2S1048, Serial No. A2S2-473506, containing an Apple II Main Logic BD RFI board, a Language card, a Smarterm Video Display Interface card, and a Disk II Interface card; a Cyborg ISAAC data acquisition unit, Model No. Sys. 91, Serial No. 1257, Part No. 850-260, Revision F, with the back bearing a 1982 ISAAC 91A Distribution Board; a Cyborg ISAAC power supply, Serial No. A 32364, Part No. 850-213, Revision I; and two Apple Disk II floppy disk drives, with Drive 1 bearing an affixed plate numbered “21287,” with Model No. A2M0003, Serial No. 4200023,” and stamped “0209,” and Drive 2 bearing Serial No. A2M0003-68549, and attached with its dual Disk II Interface card. The setup’s monitor is not included. In overall fine condition, with the Apple II Plus, Disk II disk drives, and ISAAC in working order; however, the system in its entirety has not been fully tested.
During his time on the original Macintosh development team, Grimm was responsible for accelerating the testing process. Apple product quality has always been famously high, however, in the early days, this came at the cost of exorbitant man-hours. Every board that was manufactured had to be installed in a modified Macintosh chassis and a system test had to be run. This process would take several minutes per board, significantly decreasing production speed. To speed up this process, Grimm designed this fully automated tester where the Macintosh motherboard was simply connected and the test would automatically run, reducing the time to mere seconds. This testing setup was later upscaled and installed in the Macintosh production plant in Fremont, California.
From the collection of Dennis Grimm.
