03-07-2007 01:22 PM
03-12-2007 04:04 PM
Hmmm... I thought this one a lot 'cause I know exactly what you are looking for but I know that the software does not has a special function for that purpose, you may have to workaround it... so, go to your spreadsheet view in Ultiboard, and go to the Nets tabs... select all nets and click on the Routing Layers column, select only the Bottom layer and click OK, it will update the change for all Nets (and all pins), now, what you are trying to do is to tell the software to route only on the bottom layer... start the autorouter or manual tracing, whenever you cannot find a route for a specific trace, then on those cases overwrite this rule (routing layer column on the spreadsheet view) only for those nets, and try routing (manually) starting on the bottom layer but then switching to the top layer, 'on the fly' you can use the pull-down menu on the top toolbar for layer selection and it will place a via and switch to trace to the top layer... do the same when you want to come back to the bottom layer.
Did that made sense?...