SB drivers that some software needs in order to use with the PAS-16. CT-VOICE.DRV CTVDSK.DRV INST-DRV.EXE Run INST-DRV first to set the IRQ in the drivers, then copy them over to the directory of the program that needs them to run. For example, Krusty's Funhouse needs this version of CT-VOICE.DRV to replace the one they use in order to work properly on the PAS-16.