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20060330:
The scc(4) driver replaces puc(4) for Serial Communications Controllers (SCCs) like the Siemens SAB82532 and the Zilog Z8530. On sparc64, it is advised to add scc(4) to the kernel configuration to make sure that the serial ports remain functional.
$FreeBSD: src/UPDATING,v 1.446 2006/05/04 03:48:06 marcel Exp $