Installing SIMMs312 AppendixInstalling SIMMsYou can increase the A3000’s sampling memory by installing commercially availableSIMMs (single in-line memory modules). This section explains how to carry out theinstallation.Important• Before performing the installation, please read precautions “Handling and Installa-tion of Options,” found at the beginning of this manual.• You need to use 72-pin SIMMs with access time of 70ns or less. The SIMM modulesize may be 4MB, 8MB, 16MB, or 32MB. The A3000 is designed for use with 32-bitSIMMs, but can also accept installation of 36-bit (parity-type) SIMMs.• When purchasing SIMMs, make sure that the SIMM design does not utilize morethan 18 memory chips per module. (SIMMs comprised of more than 18 chips do notoperate correctly on the A3000.)• SIMMs must be installed in pairs: you can install either two SIMMs or four SIMMs.Both modules in a pair must have the same memory capacity.• The A3000 ships with 2MB of sampling memory installed, and is capable of accessingup to 128MB. If you add one pair of 32MB SIMMs, for example, you increase theavailable sampling memory to a total of (2 + 32 × 2 =) 66MB. If you install four 32MBSIMMs, however, the sampling memory size becomes 128MB (and the original 2MBare effectively disabled).Procedure1. Be sure that you have the following at hand before starting the installation.• A3000 main unit• SIMMs (One or two pairs: 2 or 4 modules)• Phillips screwdriverMagnetic-tipped screwdriver is recommended.• WorkbenchPlease carry out all work on a stable workbench or table. Spreading a cloth over thework surface will help prevent scratching.• Gloves: Be sure to wear gloves so that your hands are not scratched by the metalcover or other metal parts.
