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The new PowerBook computer uses PC100 compliant, 144-pin DRAM SO-DIMMs. The mechanical characteristics of the DIMM are given in the JEDEC specification for the 144-pin 8-byte DRAM SO-DIMM. The specification number is JEDEC MO-190-C; it is available from the Electronics Industry Association's web site, at
http://www.jedec.org/download/default.htm
The electrical characteristics of the DIMM are given in section 4.5.6 of the JEDEC Standard 21-C, release 7. The specification is available from the Electronics Industry Association's website at
http://www.jedec.org/download/pub21/
The RAM DIMMs are required to be PC100 compliant. The PC100 specification is available from Intel's website at
http://developer.intel.com/design/chipsets/memory/sdram.htm#S1