[TUHS] UNIX System V Release 2.2 gdts Vax-780

[Dave Horsfall]

On Wed, 15 Mar 2023, arnold at skeeve.com wrote:

[...]

> That is, 'c' for character device, major device is the index in cdevsw, 
> and minor device indicates which physical one to use. Since you only 
> have one, it should be 0.

There's also the possibility of using the upper-order bits to pass flags, 
although there's not a lot that you can do with a printer (control of page 
throw, etc).

-- Dave