+
+* Additional info about PWM on the AS99127F rev.1 from lm-sensors
+ ticket #2350:
+
+I conducted some experiment on Asus P3B-F motherboard with AS99127F
+(Ver. 1).
+
+I confirm that 0x59 register control the CPU_Fan Header on this
+motherboard, and 0x5a register control PWR_Fan.
+
+In order to reduce the dependency of specific fan, the measurement is
+conducted with a digital scope without fan connected. I found out that
+P3B-F actually output variable DC voltage on fan header center pin,
+looks like PWM is filtered on this motherboard.
+
+Here are some of measurements:
+
+0x80 20 mV
+0x81 20 mV
+0x82 232 mV
+0x83 1.2 V
+0x84 2.31 V
+0x85 3.44 V
+0x86 4.62 V
+0x87 5.81 V
+0x88 7.01 V
+9x89 8.22 V
+0x8a 9.42 V
+0x8b 10.6 V
+0x8c 11.9 V
+0x8d 12.4 V
+0x8e 12.4 V
+0x8f 12.4 V