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• Macintosh_IIsi abstract "The Macintosh IIsi is a compact three-box desktop unit, effectively a cut-down Macintosh IIci in a smaller case (used for no other Macintosh model), made cheaper by the redesign of the motherboard and the deletion of all but one of the expansion card slots (a single Processor Direct Slot). It was introduced as a low-cost alternative to the professional desktop models for home use, but offered more features and performance than the LC series. It had color and could drive a number of different external monitors, with a maximum screen resolution of 640×480 in eight-bit color.It shipped with either a 40-MB or 80-MB internal hard disk, and a 1.44-MB floppy disk drive. The MC 68882 FPU was an optional extra, mounted on a special plug-in card. Ports included SCSI, two serial ports, an ADB port, a floppy drive port, and 3.5mm stereo headphone sound output and microphone sound input sockets. The IIsi was the first Macintosh released with built-in sound-in capabilities. The Macintosh LC, which was announced at the same time and also had a sound-in port, was released a number of months after the IIsi.A bridge card was available for the IIsi to convert the Processor Direct slot to a standard internal NuBus card slot, compatible with the other II-series Macintoshes. The bridge card included a math co-processor to improve floating-point performance. The NuBus card was mounted horizontally above the motherboard.To cut costs, the IIsi's video shared the main system memory, which also had the effect of slowing down video considerably, especially as the IIsi had 1 MB of slow RAM soldered to the motherboard. David Pogue's book Macworld Macintosh Secrets observed that one could speed up video considerably if one set the disk cache size large enough to force the computer to draw video RAM from faster RAM installed in the SIMM banks.The IIsi also suffers from sound difficulties: over time, the speaker contacts can fail, causing the sound to periodically drop out. This problem was caused by the very modular construction of the computer, where the mono loudspeaker is on a daughterboard under the main logic board, with springy contacts. Speaker vibrations led to fretting of the touching surfaces. The problem could be solved by removing the logic board and using a pencil eraser to clean the contacts of the daughterboard holding the loudspeaker. As the IIsi is the only Macintosh to use this case design, these issues were never corrected in a subsequent model. The IIsi was designed to be easily and cheaply manufactured, such that no tools were required to put one together - everything is held in place with clips or latches.Because of its heritage as a cut-down IIci, it was a simple modification to substitute a new clock crystal to increase the system's clock rate to 25 MHz.".
• Macintosh_IIsi cpu Motorola_68030.
• Macintosh_IIsi thumbnail Macintosh_IIsi_2.jpg?width=300.
• Macintosh_IIsi wikiPageExternalLink article.html?artnum=112177.
• Macintosh_IIsi wikiPageExternalLink SP199.
• Macintosh_IIsi wikiPageExternalLink apple-macintosh-iisi.
• Macintosh_IIsi wikiPageExternalLink 1.
• Macintosh_IIsi wikiPageID "380533".
• Macintosh_IIsi wikiPageRevisionID "579270096".
• Macintosh_IIsi cpu Motorola_68030.
• Macintosh_IIsi cpuspeed "20.0".
• Macintosh_IIsi discontinued "1993-03-15".
• Macintosh_IIsi hasPhotoCollection Macintosh_IIsi.
• Macintosh_IIsi introduced "1990-10-15".
• Macintosh_IIsi msrp "2999.0".
• Macintosh_IIsi os "System 6.0.7 to 7.6.1".
• Macintosh_IIsi ram "1".
• Macintosh_IIsi ramtype "100".
• Macintosh_IIsi subject Category:68k_Macintosh_computers.
• Macintosh_IIsi subject UX-capable_Macintoshes.
• Macintosh_IIsi subject Category:Macintosh_II_series.
• Macintosh_IIsi subject Category:Macintosh_case_designs.
• Macintosh_IIsi subject Category:Macintosh_desktops.
• Macintosh_IIsi subject Category:Products_introduced_in_1990.
• Macintosh_IIsi type 68kMacintoshComputers.
• Macintosh_IIsi type UX-capableMacintoshes.
• Macintosh_IIsi type Artifact100021939.
• Macintosh_IIsi type Computer103082979.
• Macintosh_IIsi type Device103183080.
• Macintosh_IIsi type Fabric103309808.
• Macintosh_IIsi type Instrumentality103575240.
• Macintosh_IIsi type Machine103699975.
• Macintosh_IIsi type Mackintosh103703590.
• Macintosh_IIsi type Object100002684.
• Macintosh_IIsi type PhysicalEntity100001930.
• Macintosh_IIsi type Whole100003553.
• Macintosh_IIsi type Device.
• Macintosh_IIsi type InformationAppliance.
• Macintosh_IIsi type DesignedArtifact.
• Macintosh_IIsi comment "The Macintosh IIsi is a compact three-box desktop unit, effectively a cut-down Macintosh IIci in a smaller case (used for no other Macintosh model), made cheaper by the redesign of the motherboard and the deletion of all but one of the expansion card slots (a single Processor Direct Slot). It was introduced as a low-cost alternative to the professional desktop models for home use, but offered more features and performance than the LC series.".
• Macintosh_IIsi label "Macintosh IIsi".
• Macintosh_IIsi label "Macintosh IIsi".
• Macintosh_IIsi label "Macintosh IIsi".
• Macintosh_IIsi label "Macintosh IIsi".
• Macintosh_IIsi label "Macintosh IIsi".
• Macintosh_IIsi sameAs Macintosh_IIsi.
• Macintosh_IIsi sameAs Macintosh_IIsi.
• Macintosh_IIsi sameAs Macintosh_IIsi.
• Macintosh_IIsi sameAs Macintosh_IIsi.
• Macintosh_IIsi sameAs m.021jgg.
• Macintosh_IIsi sameAs Q1430528.
• Macintosh_IIsi sameAs Q1430528.
• Macintosh_IIsi sameAs Macintosh_IIsi.
• Macintosh_IIsi wasDerivedFrom Macintosh_IIsi?oldid=579270096.
• Macintosh_IIsi depiction Macintosh_IIsi_2.jpg.
• Macintosh_IIsi isPrimaryTopicOf Macintosh_IIsi.