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=General Information=
 
=General Information=
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The Macintosh IIci is the first in a new series of Macintosh computers compatible with the Macintosh II family ([[Macintosh II]], [[Macintosh IIx]], and [[Macintosh IIcx]]), and offering improved performance and flexibility. The new architecture is based upon the Memory Decode Unit (MDU) and RAM-based video chips (RBV). Key new features are a 25 MHz clock speed and on-board video; most other features are the same as the [[Macintosh IIcx]].
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===CPU===
 
===CPU===
 
Powered by a 25MHz [[Motorola 68030]] processor with 68882 math co-processor. The data bus is also 25MHz.
 
Powered by a 25MHz [[Motorola 68030]] processor with 68882 math co-processor. The data bus is also 25MHz.
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===Memory===
 
===Memory===
 
There is no onboard memory on the IIci, but you have 8 slots available for 30-pin SIMMs with a maximum capacity of 128MB.
 
There is no onboard memory on the IIci, but you have 8 slots available for 30-pin SIMMs with a maximum capacity of 128MB.
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Physical memory is not contiguous, as it is on the Macintosh II, IIx, and IIcx.  The 68030 on-chip MMU is used to join the discontiguous blocks of physical memory to present contiguous logical memory to application software. RAM must be 80 ns access time (or faster), fast page mode.
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===Video===
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On-board video support for 12” B&W, 13” RGB, and 15” B&W Portrait monitors.
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If the on-board video is used, RAM must be installed in Bank A because the frame buffer is maintained beginning at physical address $00000000. The RBV’s frame buffer is variable in size, depending on the currently selected bit-depth and on the size of the video monitor plugged in to the on-board video port. The RBV will require only the amount of memory to hold the contents of the screen; no additional memory is used for the frame buffer by the RBV. Software will determine the maximum (default, or previous selection by the user)video bit depth to be made available at startup, and set aside that memory for video.
    
===Cache Card===
 
===Cache Card===
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=Documentation=
 
=Documentation=
 
* [[Macintosh IIcx/IIci/Quadra 700 Service Source]]
 
* [[Macintosh IIcx/IIci/Quadra 700 Service Source]]
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* [[Macintosh IIci Developer Note]]
    
=See Also=
 
=See Also=

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