Use the sgminer v5.5 for Pascal

the decred algorithm is also included in this version so you can just change the "-k pascal" to "-k decred" and off you go.

Sample:
-k decred -o stratum+tcp://decred.hk.nicehash.com:3354 -u .$rigName -p x -I 21 -w 64 -g2 --text-only

Note: I am not too sure if "-I 21 -w 64 -g2" is best settings for DECRED. Anyone knows?