diff --git a/debug/hardware.txt b/debug/hardware.txt
index 97a9d7cd..dd3e730f 100644
--- a/debug/hardware.txt
+++ b/debug/hardware.txt
@@ -5,6 +5,7 @@ Hardware:
   6 x PTI interface (used first four - 0-3)
       (appears something like programmable transfer interface or so)
 * Demodulators 2x STV0900 (dual)
+* 2x STV6120 tuners (dual)
 * 2x LNBH24 - Dual LNB supply and control IC with step-up and I2C interface
 
 I2C address map:
@@ -19,6 +20,11 @@ I2C address map:
 0x16 - LNBH24 #2 / section B : cfg write
 0x17 - LNBH24 #2 / section B : diagnostic read
 
+0xc0 - STV6120 #1 / write
+0xc1 - STV6120 #1 / read
+0xc6 - STV6120 #2 / write
+0xc7 - STV6120 #2 / read
+
 0xd0 - STV0900 #1 - write
 0xd1 - STV0900 #1 - read
 0xd2 - STV0900 #2 - write
diff --git a/debug/stv6120.pdf b/debug/stv6120.pdf
new file mode 100644
index 00000000..4bcea498
Binary files /dev/null and b/debug/stv6120.pdf differ