20 Mar
2009
20 Mar
'09
8:35 a.m.
Paul Koning <Paul_Koning at Dell.com> wrote:
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
>>>> >>>>> "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.)