dumb rx01 image question

[Johnny Billquist]

Paul Koning <Paul_Koning at Dell.com> wrote:

>>>>>> >>>>> "Don" == Don North <ak6dn at mindspring.com> writes:
> 
>  Don> The 'even/odd-skew-by-6' algorithm mentioned in a previous email
>  Don> is what I found works for XXDP. It is probably the DEC
>  Don> 'standard' for RX01/02 drivers.
> 
> I would assume that is the case.  I found it in a RSTS driver, and
> the that that two very different systems share a mapping function
> suggests it's a DEC standard.  (DEC certainly tended to standardize
> this sort of thing company-wide.)

Yeah. I can report that RSX do the same skewing/interleaving as well.

And to make the point even clearer to the original poster: this is not 
something simh is aware of, or involved in. This is a mapping algorithm 
done by the PDP-11 in software (in the driver). So it definitely applies 
in this case.

	Johnny

-- 
Johnny Billquist                  || "I'm on a bus
                                   ||  on a psychedelic trip
email: bqt at softjar.se             ||  Reading murder books
pdp is alive!                     ||  tryin' to stay hip" - B. Idol