From: Spiro Trikaliotis (ml-cbmhackers_at_trikaliotis.net)
Date: 2004-06-12 21:10:39
Hello Jim,
* On Sat, Jun 12, 2004 at 01:04:47PM -0500 Jim Brain wrote:
> Spiro Trikaliotis wrote:
> >>For reading of files using GET# and such, I found the CBM would
> >>simply drop ATN when it had enough data to fulfill the request.
> >Hu? The ATN is dropped immediately after an OPEN, CLOSE, LISTEN/TALK
> >or UNLISTEN/UNTALK (with perhaps the secondary address) is sent. If
> >you
> Actually, ATN is dropped BEFORE they are sent. ATN signals that the
> bytes to follow are commands.
Well... What exactly do you mean with dropping?
For me, I set ATN when I have to send a command, and I drop ATN when the
command byte (and the secondary address, if necessary) had ended.
Could it be that "your" dropping is what I call "setting"?
> >Yes, channel 0 assumes ",P,R" at the end, while channel 1 assumes
> >",P,W".
> Wonder why they did that as opposed to simply adding the ,p,w to the
> save logic in the cpu units?
Who knows... Possibly, channel 0 and 1 were there before the other
channels have been introduced?
Regards,
Spiro.
--
Spiro R. Trikaliotis
http://www.trikaliotis.net/
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