SYS_SETFAULTHANDLER Set signal Handler
SYS_YIELD Yield remainder of timestamp
SYS_SLEEP Sleep until messaged or signaled
+SYS_TIMEDSLEEP Sleep until a specified time has elapsed
SYS_WAITEVENT Wait for an event
SYS_WAITTID Wait for a thread to do something
SYS_OPENPIPE Open a FIFO pipe pair
SYS_CLOSE Close a file
SYS_COPYFD Create a copy of a file handle
-SYS_FDCTL Modify properties of a file descriptor
+SYS_FDCTL Modify flags of a file descriptor
SYS_READ Read from an open file
SYS_WRITE Write to an open file
SYS_IOCTL Perform an IOCtl Call