Support for new Dual G4 1 Gig machines?

Holger Bettag hobold at Informatik.Uni-Bremen.DE
Wed Jan 30 02:01:08 EST 2002

Apparently the GHz Macs use a new CPU variant, the MPC7455. It differs
very slightly from the earlier CPUs in that it has

 - a feature to lock parts of the L1 data cache (can probably be ignored)

 - some extra SPRGs (can probably be ignored)

 - 4 additional DBATs and 4 additional IBATs. I am not sure if those
   require initialization at early startup to not interfere with later

The real difference is in fabrication; it is the first SOI part.

Some official info here (beware of line wrap):


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