The RCW directories names for the p5020ds board conform to the following naming
convention:

ab_bcdefghi_j:

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 or SATA
d = What is available in Slot 2
e = What is available in Slot 3
f = What is available in Slot 4
g = What is available in Slot 5
h = What is available in Slot 6
i = What is available in Slot 7

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

j = 'hex value of serdes protocol value'

So NR_HXAPNSP_0x36 means:
 - no RGMII@DTSEC4
 - RGMII@DTSEC5
 - SATA [Slot 1 not used]
 - XAUI on Slot 2
 - AURORA on Slot 3
 - PCIE on Slot 4
 - SGMII on Slot 6
 - PCIE on Slot 7

Slot 5 is not used, and the SERDES Protocol is 0x36.