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The GW4402A 64-pin ROM SIMM replaces the
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ROM SIMM of a Macintosh II-series or
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Macintosh SE/30 computer. GW4402A comes
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preprogrammed with a customized, 32-bit clean
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Macintosh ROM. The customized ROM allows your
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Macintosh to use more than 8MB of RAM,
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and also features a 7.5MB bootable ROM disk
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preloaded with System 7.1 and several utilities.
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Compatibility
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----------------------------------------
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GW4402A is compatible with the following
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Macintosh computers:
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- Macintosh IIx
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- Macintosh IIcx
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- Macintosh IIci
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- Macintosh IIfx
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- Macintosh IIsi
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- Macintosh SE/30
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Fast Startup
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----------------------------------------
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It takes about 10 seconds to boot from
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the included ROM-based System 7.1,
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so you can begin working with programs
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or playing games almost instantly.
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ROM Disk Settings
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----------------------------------------
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A control panel allows your preferences
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for the built-in ROM disk to be changed.
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You can boot from the ROM disk,
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mount it under another boot disk,
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or hide it from the desktop completely.
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Of course, you can always hold "R"
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during startup to boot from ROM.
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It's also possible to enable RAM disk mode,
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which allows writing data to the ROM disk,
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although it is not retained between restarts.
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The RAM disk is enabled by holding "R" and "A"
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during startup, or by enabling a setting
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in the control panel.
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Ecologically Friendly, Gold-Plated PCB
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----------------------------------------
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GW4402A features a lead-free, ENIG gold-plated,
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4-layer PCB and is fully EU RoHS-compliant.
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All units are tested extensively before shipment.
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Only new parts are used to build GW4402A,
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and all GW4402A ROM SIMM modules are
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manufactured in our semi-automated facility
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in Columbus, Ohio, in the United States.
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Open-Source Design
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----------------------------------------
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GW4402A's design is fully open-source.
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The schematics, board layouts,
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and driver software are all freely available
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for commercial and noncommercial use.
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To download the design files, visit the
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_Garrett's Workshop GitHub page_.
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