<dd>Type of CPU. Recognized types are: 51, 8051, 8751, C51, 80C51,
87C51, 31, 8031, C31, 80C31, 52, 8052, 8752, C52, 80C52, 87C52, 32,
8032, C32, 80C32, 51R, 51RA, 51RB, 51RC, C51R, C51RA, C51RB, C51RC,
-89C51R, 251, C251, DS390, DS390F. Note that recongition of a CPU type as option does
-not mean that the simulator can simulate that kind of CPU. Default
-type is C51. DS390 supports Dallas DS80C390 dual-dptr operations,
-DS390F supports minimal flat24 mode code and dual-dptr operations.
+89C51R, 251, C251, DS390, DS390F. Note that recognition of a CPU type
+as option does not mean that the simulator can simulate that kind of
+CPU. Default type is C51.
+<br>DS390 supports Dallas DS80C390 24 bit flat mode, dual-dptr operations, etc.
+DS390F is the same as DS390, but it starts already in 24 bit flat mode
+(ACON = 0xFA instead of 0xF8). DS390F is needed to run programs compiled
+with sdcc -mds390.
<br>See <a href="cpu_types.html">how to select CPU type</a>.