[Info-vax] TK50 - this is annoying...

[George Cornelius]

Johnny Billquist wrote:

> On 2012-10-18 16:44, glen herrmannsfeldt wrote:

[...]

>> The data is written twice, in parallel. Three data bits on 10 tracks.
> 
> I think it's time we kill the just created myth of blocks written
> backwards, and what not. That has, as far as I know, never been done.

Actually, my error was thinking that it was separate blocks. And
I knew better, but those particular bits in my grey matter are
fading almost as fast as the ones on the DECtape reel I saved
from my PDP-8 days.

I was surmising that the data bits might have been flipped in
software at write time, but still writing forward.  Slows down
writes but improves performance on read reverse.  Just trying to
make sense of the comment earlier in the thread which, as you
say, did not accurately describe the situation.

Thanks for setting us straight.

George