--- ray/src/rt/driver.h	1989/02/02 10:41:13	1.1
+++ ray/src/rt/driver.h	1989/04/19 22:01:38	1.2
@@ -56,16 +56,17 @@ extern struct device  devtable[];	/* supported devices
  *	The name string is used to identify the client.
  *	A device can be open by at most one client.
  *	Be verbose in error reports; call stderr_v().
- *	If device has its own error output, set errvec.
+ *	If device has its own error output, set errvec,
+ *	cmdvec and wrnvec.
  *  }
  *  (*dev->close)()
  *  {
- *	Close the device.  Reset errvec to stderr_v.
+ *	Close the device.  Reset error vectors.
  *  }
  *  (*dev->clear)(xres, yres)
  *  int  xres, yres;
  *  {
- *	Clear the device for xres by yres output.  This call must
+ *	Clear the device for xres by yres output.  This call will
  *	be made prior to any output.
  *  }
  *  (*dev->paintr)(col, xmin, ymin, xmax, ymax)
@@ -96,13 +97,14 @@ extern struct device  devtable[];	/* supported devices
  *	Read an edited input string from the command line.  If
  *	an unrecognized control character is entered, terminate
  *	input and return the string with only that character.
- *	The input string should not contain a newline ('\n').
+ *	The input string should not contain a newline.
  *	Must work in consort with comout.
  *  }
  *  xsiz, ysiz
  *	The maximum allowable x and y dimensions.  If any
  *	size is allowable, these should be set to MAXRES.
  *  inpready
- *	This variable should be positive
- *	when characters are ready on the input.
+ *	This variable should be made positive asynchronously
+ *	when characters are ready on the input.  (Often easiest
+ *	to check for input during calls to paintr.)
  */