thodg/cgminer

diff --git a/ASIC-README b/ASIC-README
index dafbfb1..235255d 100644
--- a/ASIC-README
+++ b/ASIC-README
@@ -14,6 +14,7 @@ Currently supported devices include:
 - Antminer U1 USB
 - Cointerra
 - Antminer S1
+- BFx2 USB
 
 No COM ports on windows or TTY devices will be used by cgminer as it
 communicates directly with them via USB so it is normal for them to not exist or
@@ -58,7 +59,7 @@ Bitfury devices need the --enable-bitfury option when compiling cgminer.
 
 Currently the BPMC/BGMC BF1 devices AKA redfury/bluefury are supported and
 come up as BF1, along with the Bi*fury USB devices which come up as BXF.
-Nanofury devices come up as NF1.
+Nanofury devices come up as NF1. BFx2 devices come up as BXM.
 
 Bitfury USB devices are also set up as per the USB ASICs below.
 
@@ -446,6 +447,11 @@ temperature just below an optimal target. This option allows you to change the
 target temperature. When actively cooled below this, the devices will run at
 maximum speed.
 
+--bxm-bits <arg>    Set BXM bits for overclocking (default: 50)
+
+Choose the overclocking  bits for BFx2 devices, where 54~55 is optimal but
+may be beyond the power usage of USB2 specifications.
+
 --nfu-bits <arg>    Set nanofury bits for overclocking range 32-63 (default: 50)
 
 Cgminer by default sets the clockspeed on nanofury devices to the highest that
diff --git a/README b/README
index 6b5ff26..c7222d7 100644
--- a/README
+++ b/README
@@ -279,6 +279,7 @@ ASIC only options:
 --bitburner-fury-voltage <arg> Set BitBurner Fury core voltage, in millivolts
 --bitburner-voltage <arg> Set BitBurner (Avalon) core voltage, in millivolts
 --bxf-temp-target <arg> Set target temperature for BXF devices (default: 82)
+--bxm-bits <arg>    Set BXM bits for overclocking (default: 50)
 --hfa-hash-clock <arg> Set hashfast clock speed (default: 550)
 --hfa-fail-drop <arg> Set how many MHz to drop clockspeed each failure on an overlocked hashfast device (default: 10)
 --hfa-fan <arg>     Set fanspeed percentage for hashfast, single value or range (default: 10-85)
@@ -301,8 +302,8 @@ See FGPA-README for more information regarding this.
 Cgminer should automatically find all of your Avalon ASIC, BFL ASIC, BitForce
 FPGAs, Icarus bitstream FPGAs, Klondike ASIC, ASICMINER usb block erupters,
 KnC ASICs, BaB ASICs, Hashfast ASICs, ModMiner FPGAs, BPMC/BGMC BF1 USB ASICs,
-Bi*fury USB ASICs, Nanofury USB ASICs, Antminer U1 USB ASICs and Cointerra
-devices.
+Bi*fury USB ASICs, Nanofury USB ASICs, Antminer U1 USB ASICs, Cointerra
+devices and BFx2 USB ASICs.
 
 ---