A method, apparatus, and article of manufacture for transferring credits from one gaming device to another via the use of coded scrip is disclosed. Form pass gate FET transistors and form a pair of vertical pull-down FET transistors with a first common body and a first common source in a silicon layer patterned into parallel islands formed on a planar insulator. They are particularly useful as inhibitors of hepatitis C virus NS5B polymerase, as inhibitors of HCV replication, andor for the treatment of hepatitis C infection.