zawada@dcs.qmw.ac.uk (Simpson) (06/11/91)
Has anbody written an ethernet driver for PC-AT Minix, based
around the lance chip?
The lance chip is at the heart of a BICC PC-AT ethernet board,
I'm trying to network with.
A driver written for this board would be extremely useful. But
I'd be greatful for just a lance driver on it's own.
--
Mark Simpson Snail Mail:
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\/ | United KingdomRON@psuvm.psu.edu (Ron McCarty) (06/11/91)
In article <3133@redstar.dcs.qmw.ac.uk>, zawada@dcs.qmw.ac.uk (Simpson) says: > >Has anbody written an ethernet driver for PC-AT Minix, based >around the lance chip? > >The lance chip is at the heart of a BICC PC-AT ethernet board, >I'm trying to network with. > The Lance chip is also at the heart of the DEC DEMCA ethernet card which is used to connect PS2s to an ethernet. I have received the literature on the Lance chip (it is made by Advanced Micro Devices), and hope to convert the Minix ethernet driver this summer when I get to it. Ron McCarty
pete@ohm.york.ac.uk (-Pete French.) (06/13/91)
in article <91162.122856RON@psuvm.psu.edu>, RON@psuvm.psu.edu (Ron McCarty) says: > > In article <3133@redstar.dcs.qmw.ac.uk>, zawada@dcs.qmw.ac.uk (Simpson) says: > > > The Lance chip is also at the heart of the DEC DEMCA ethernet card which is > used to connect PS2s to an ethernet. I have received the literature on the > Lance chip (it is made by Advanced Micro Devices), and hope to convert > the Minix ethernet driver this summer when I get to it. Ive written LANCE device drivers before now and they are not too hard - except that there are certain things you have to do which arent mentioned in the documentation. The most important of these is that when you are freeing the ring buffers you must do so in REVERSE order (anticlockwise round the ring). This also applies when marking the ring buffers as containing a packet for transmission - do it in reverse order. The reason behind this is obvious if you think about it, but if not you get a driver which woirkes 80% of the time but falls over occasionally for no apparent reason. These are the hardest bugs to fix. Have fun.... -bat. PS: My code was written in OCCAM and so is not really portable. -- -Pete French. (the -bat. ) / "Two wrongs don't make a right, Adaptive Systems Engineering / - but three lefts do !" "Look here, a Brit who has obviously been driving in California!"