At this time, there are no known errata to this release of the reference design.
Release 3.0 of the reference design incorporates the workarounds that were required for the errata found on release 1.0 of the reference design. These workarounds are of two types - board level and 660 bridge related.
Board level errata to the release 1.0 reference design required trace cutting, component removals, wire additions, and component additions. All of these modifications have been incorporated into the physical design of the release 3.0 reference design.
Errata related to the 660 bridge were required on the release 1.0 reference design to accommodate the errata and product changes associated with the previous revision of the 660 bridge (663 revision 2.0 and 664 revision 1.1). The final revision of the 660 bridge is 663 revision 2.0 and 664 revision 1.2.
Changes to the release 1.0 reference design to accommodate the 663 have been incorporated into the physical design of the release 3.0 reference design.
Changes made to the release 1.0 reference design to accommodate the 664 have been incorporated into the physical design of release 3.0 of the reference design in such a way as to allow the design to be used with either revision 1.1 or revision 1.2 of the 664. One set of 0W resistors is populated to select revision 1.2 of the 664 (no PALs). A different set of resistors is populated (and the workaround PALs installed) to select revision 1.1 of the 664. The schematic and BOM reflect usage of revision 1.2 of the 664.
Revision 3.0 of the reference design contains no workaround PALs for revision 1.2 of the 664. Should any workaround PALs be required for revision 1.2 of the 664, it may be possible to use the sites used by the workaround PALs associated with revision 1.1 of the 664. For more information on the 660 Bridge, contact an IBM technical representative for current documentation.
