Two different versions of the COPY.COM file can be created based on the "GENERIC" assembly option in the source file (see COPY.ASM). When the GENERIC option is enabled, features that require direct access to the controller are disabled (primarily the FORMAT option). The GENERIC option also forces 2-1 interleave since most BIOSes cannot keep up with consectuive sector reads and writes.

The file COPY.COM is the copy utility with Tarbell specific features (GENERIC=FALSE)

The file COPYSSSD.COM is the copy utility which does not access the controller directly and is most likely to run on any SSSD BIOS (GENERIC=TRUE)