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New Format For Memory " reg" Property

Subject: New Format For Memory " reg" Property
From: "W. W. Gilpin" <email@hidden>
Date: Mon, 31 May 2004 02:16:13 -0500

What is the new format used on the PowerMacG5 for the " reg" property of the "memory@0,0" entry in the IORegistry / Open Firmware? It is different from the format described in QA1065 which is used by machines prior to the G5.

My goal is to provide the same information about installed RAM DIMMs as System Profiler.

Somehow, the information below is telling me that I have a 256MB DIMM in each of slots 0 and 1, and a 512MB DIMM in each of slots 2 and 3.

00000000 00000000 20000000 00000000 00000000 00000000 00000000 20000000
20000000 00000000 40000000 20000000 00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000

Is this information documented anywhere? My searches have proven fruitless thus far.

Thanks,

W. W. Gilpin
email@hidden
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