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Apple Macintosh IIsi

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description Apple Macintosh IIsi Overview

The Apple Macintosh IIsi is a personal desktop computer released in 1990 as a lower-cost alternative to the highly successful Macintosh IIci. It is powered by a 20 MHz Motorola 68030 processor and originally shipped with 1MB or 5MB of RAM, expandable to a maximum of 65MB using proprietary SIMM slots. The compact, horizontal desktop enclosure featured a single direct processor-direct slot that could accommodate an FPU or be adapted into a NuBus slot. It was targeted at budget-conscious professionals and educational institutions requiring the expandability of the Macintosh II family.

help Apple Macintosh IIsi FAQ

How much RAM can the Apple Macintosh IIsi hold?

When released in 1990, the Macintosh IIsi originally shipped with 1MB or 5MB of RAM. However, users could expand the memory using proprietary SIMM slots to a maximum capacity of 65MB for demanding professional applications.

What is the processor inside the Macintosh IIsi?

The Macintosh IIsi is powered by a 20 MHz Motorola 68030 processor. This allowed it to serve as a highly capable, lower-cost alternative to the more expensive and faster Macintosh IIci.

Does the Macintosh IIsi have expansion slots?

Unlike some higher-end models of its era, the IIsi features a single processor-direct slot rather than multiple standard NuBus slots. Users could purchase expansion cards, such as video accelerators or additional cache, to insert into this specific slot.

Does the Apple Macintosh IIsi have a built-in screen?

No, unlike the all-in-one Macintosh models of the time, the IIsi was designed as a compact modular desktop unit. It required a separate external Apple monitor, though it did include built-in video circuitry to drive it directly without needing a dedicated video card.

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