Reading this thread, I can't help but ask if something I used to do back
many years ago in Orcad would work with Protel for buses. I also used to
deal with bussing large numbers of control signals in Orcad. It was not that
hard to do with Orcad because it would eloquently handle multiple netnames
on nets. It would even supply a list of renamed or multiply named nets in
the ERC report so you could check for any mismatches in multiply named nets.
To bus control signals I handled it in the following manner, does this work
in Protel, I don't have time right now to give it a thorough test.
        Name your control signals as normal while they are separate signals,
close to the originating ICs. Just before you enter a bus, assign a new
netname with an arbitrary sequential naming (i.e. B1, B2, B3..., C1, C2,
C3...). Name the bus B1..3 or C1..3. When you break a signal out of the bus
again assign the sequential naming immediately when leaving the bus, then
later along the individual signal rename it again to the control signal
name.
        Used to work just fine in Orcad, does it work for Protel? It could
cause some minor confusion to the un-initiated but after a minute or two and
a brief explanation, everyone worked with it just fine.

Sincerely,

Brad Velander
Lead PCB Design
Norsat International Inc.
#100 - 4401 Still Creek Dr.,
Burnaby, B.C., Canada.
V5C6G9.
voice: (604) 292-9089 (direct line)
fax:    (604) 292-9010
email: [EMAIL PROTECTED]
www: www.norsat.com


> -----Original Message-----
> From: Terry Harris [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, April 05, 2001 7:37 AM
> To: Protel EDA Forum
> Subject: Re: [PEDA] Bus nets
> 
> 
> On Thu, 5 Apr 2001 17:26:00 +1000 , you wrote:
> 
> >My design is only on the one sheet so there should be no problem.
> 
> In that case you should understand busses are almost 
> completely cosmetic. 
> 
> Placing a net label on a wire is what connects it to any 
> other wire with a
> similar label.
> 
> The only time busses actually do anything is when you put a 
> label on them
> and connect them to a single port. Only contiguous numeric 
> sequences are
> supported and it is only a short hand way of drawing that 
> many labelled
> individual wires and ports. 
> 
> Cheers, Terry.


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