* Header file to overcome 8051 compiler differences for specifying\r
* special function registers. The following compilers are supported:\r
* SDCC, Keil, Raisonance, IAR, Hi-Tech, Tasking, Crossware, Wickenhäuser.\r
- * Unfortunately not for use with Dunfield.\r
+ * Unfortunately not for use with Dunfield. The compilers are identified by\r
+ * their unique predefined macros. See also:\r
+ * http://predef.sourceforge.net/precomp.html\r
*\r
* SBIT and SFR define special bit and special function registers at the given\r
* address. SFR16 and SFR32 define sfr combinations at adjacent addresses in\r