· myoldmac.net · Vintage Apple Macintosh Computer ·
Macintosh IIsi - Classic Design Curves...
The IIsi shares some features with the SE/30,
the LC series, and the Mac II series. Like the
SE/30, it has a 68030 PDS for expansion. Like
the LC, it has no built-in NuBus slot, is quite
short, and has a curved front. But with an adapter (not included in this auction), the PDS can be
converted to a NuBus slot, making it a legitimate
member of the Mac II family. You can buy a suitable display here.
Although the IIsi
was marketed as a 20 MHz computer, users quickly
discovered it used parts rated at 25 MHz. (Apple
had intended it as a 25 MHz computer, but chose
to scale back the speed to avoid cutting into
IIci sales.) Chipping the IIsi to 25 MHz -- or
even 28 MHz -- is not unusual.
Along with the
LC, the IIsi was one of the first Macs with audio
input. You can do a lot with a IIsi. I know of
a Mac IIsi being used as a server for an ethernet
network, another being used to play kids games,
and there are even some where I live being used
for QuarkXPress and Illustrator.
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