06h 2 DIRNUM Current Directory Number
08h 2 DIRBUF Pointer to Directory Buffer (A930h)
0Ah 2 DPB Pointer to DPB/XDPB (A890h/A8D0h for Drive A/B) Drive Param Block
0Ch 2 CSV Pointer to CSA (A8A9h/A8E9h for Drive A/B) Checksums
0Eh 2 ALV Pointer to ALT (A8B9h/A8F9h for Drive A/B) Allocation Table