1. Retrieve the saved value of PHYRegister 0x6B

2. Take bits 0-7 of the value
3. Take bits 8-15 of the value and shift right by 8 bits
4. If bit 7 is set in either value, subtract 0x100 from the value (results in signed 8 bit values)

5. Find the BB PGA value from the table below using the offsets passed in, mutiply that by the previous values from PHYRegister 0x6B

6. Add 0x20 to each value, then shift the result right by 6
7. Clamp both results between -15 and 15
8. If the PHY Revision is 5 or less
   1. Add one to each value, then right shift by 1
   2. Clamp both results between -8 and 7
   3. If either value is below 0, add 0x10
   4. Left shift the value that came from bits 8-15 by 4 and mask with 0xF0, then bitwise OR with the other value masked with 0xF, this is the DC Bias
9. Otherwise
   1. If either value is below 0, add 0x40
   2. Left shift the value that came from bits 8-15 by 6 and mask with 0xFC0, then bitwise OR with the other value masked with 0x3F, this is the DC Bias

BB PGA Lookup Table