Re: gEDA-user: gschem: How is the conversion of using Busses

[Manfred Eggersdorf <manfred.eggersdorf@xxxxxx>]

Hello Ales,
Yes,  had also the feeling, that all nets are global, but in the example 
(www.geda.seul.org/docs/current/tutorials/gsch2pcb/tutorial.html) a 
port-symbol is used.

This port -symbol  got a net attribute (vmixre:1) and a value attribute 
(Vmixer).
So I thougth that it is 1. necessary and 2nd: the net attribute belongs 
to the "real" connection for the net (equals net-label) and the value 
attribute belongs to get an overview  for the "reader" of the schematic.

Based on this, I would like to sum up some nets (like Do to D7) to a bus 
- bring this bus up to the next sheet  and divide it there into the parts.

But if I understand you right, then:
* is the bus simly a grafical help for the user with no affect to the 
netlist?
* I do not need Port-symbol
* it is simply to label  each net individual - sum up to an "any bus I 
like" - only to mark specially that they belongs together  - thats all?

If I would connect nets with the net-attribute like D0, A1, CE - to one 
bus - with no net-attribute, but with a value-attribute like "Ram-bus" - 
and would simply draw an Arrow with a text on it like "belongs to sheet 
xx" it would:
1st automaticly connect to each scheet of the project with the same 
net-attributes, because nets are global
2nd the  bus-would be used as a "grafical line wiht no effect"?

Is it correct like this?

Manfred



Ales Hvezda schrieb:

> [snip]
>  
>
> > If I use D0 to D7 for the single nets, how have I to set the "net" 
> > attribute of the bus? D1..D7 - or D[1..7] - is there any convention?
> >    
>
> 	At this point in time, buses are really just cosmetic.
> The netlister doesn't really pay much attention to them.  It does pay 
> a lot of attention to the netname= attributue on the nets.
>
>  
>
> > Also, I do not know how I have to set the "value" and the "net" 
> > attributes of the Port-symbol, which schould make the connection to the 
> > next sheet...
> >    
>
> 	You shouldn't have to do this at all, since all nets are global
> across all loaded schematics.  gEDA/gaf doesn't use port symbols
> to move connectivity between sheets.  Let me know if I have totally
> misunderstood you.
>
> 								-Ales
>
>
>