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Castle StrongARM 233MHz CPU (front)
Castle StrongARM 233MHz CPU (back)
This a StrongARM CPU card for a RiscPC. It has a 233MHz Intel SA110 revision S StrongARM CPU and was used in Casstle built RiscPCs. The CPU card part number is 1111,160 Issue 1, whereas the Acorn equivalent was 1111,150 Issue 3. The card uses an Intel StrongARM because Digital had sold its chip design and fabrication business to Intel. The Castle serial numberis CTL05000981.