The RCW directories names for the P2041RDB board conform to the following naming
convention:

ab_cd_e:

a = 'R' if RGMII@DTSEC4 is supported / 'N' if not available/not used
b = 'R' if RGMII@DTSEC5 is supported / 'N" if not available/not used

c = What is available in Slot 1
d = What is available in Slot 2 or SATA

For the Slots (c..i):
 'N' if not available/not used
 'P' if PCIe
 'X' if XAUI
 'R' if SRIO
 'S' if SGMII
 'H' if SATA
 'A' is AURORA

e = 'hex value of serdes protocol value'

So RR_PH_0x19 means:
 - RGMII@DTSEC4
 - RGMII@DTSEC5
 - PCIE on Slot 1
 - SATA [Slot 2 not used]
 - The SERDES Protocol is 0x19