On Mon 20 Jun 2011 at 11:56:41 +0200, Ingo Korb wrote: > Jim Brain <firstname.lastname@example.org> writes: > > > Scanning both busses might be an issue, but maybe not insurmountable. > > The easiest way would be to wait for an ATN signal from either bus at > startup, then servicing only that bus until the AVR is reset. This > scheme might switch to the wrong port if there are other devices > connected on both ports and not all of them are powered on. I wasn't even thinking of having both ports connected at the same time. That might people lead to expect that it worked like a protocol converter! (Not a usless thing, of course, but that wouldn't work in the current firmware, I expect). I remember that at school, we had at some point at least 4 PETs connected to a single 4040 disk drive and a 4023(?) printer using metres long custom IEEE cabling that was chained from computer to computer and finally to the disk drive and printer. (Maybe they were somewhere in the middle, I don't remember; and possibly it was a star topology instead of a chain (at least it would have been like that as an initial version)). Worked fine - as long as no two computers would try to use the bus at the same time. -Olaf. -- ___ Olaf 'Rhialto' Seibert -- There's no point being grown-up if you \X/ rhialto/at/xs4all.nl -- can't be childish sometimes. -The 4th Doctor Message was sent through the cbm-hackers mailing listReceived on 2011-06-20 15:00:17
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