This package consists of some extension routines to the BASIC-11 V2 interpreter running under RT-11 V03 (or later) that provide the means for reading (GET, GETB, TBIT) and writing (PUT, PUTB, SBIT) words, bytes and bits at any implemented UNIBUS or Q-BUS address. This bus access is useful for exercising any peripheral device, especially if a handler is not present in the operating system. The arguments for these routines may be either octal or decimal. Also included are routines for identifying (IDEN) the extended BASIC-11 interpreter and for fast zeroing (NULL) arrays. The package includes complete source and documentation files.