Hi, --enable-directio seems to be used for two different things: First, SCSI DMA (from adapter to user memory). This is documented in README.linux. Second it's used in umax_pp*, probably for direct parport access.
As these two are quite unrelated I would prefer to change the name of the latter to e.g. --enable-outb (or similar) and to document it in the README or if it's linux-specific, the README.linux file. Bye, Henning
