Mail Archives: geda-user/2016/01/26/15:34:54

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Subject: Re: [geda-user] The nature of gEDA users
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From: John Doty <jpd AT noqsi DOT com>
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Date: Tue, 26 Jan 2016 13:34:37 -0700
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On Jan 26, 2016, at 1:18 PM, Nicklas Karlsson =
(nicklas DOT karlsson17 AT gmail DOT com) [via geda-user AT delorie DOT com] =
<geda-user AT delorie DOT com> wrote:

>>> Frankly, PCB is not a
>>> high-end package and custom ASIC users are not our target audience.
>> But gschem can do schematic capture for ASIC even though that=92s not =
its target. The difference is that gschem doesn=92t limit what you can =
draw. It=92s quirky and limits *how* you can express what you need, but =
I=92ve never found it incapable of expressing a circuit. It gives you a =
few crude primitives and a few ways to compose more complex objects from =
simple objects. A few layers of that, and you have a 6000 component =
mixed-signal ASIC.
> A few crude primitives to compose more complex objects is the only =
thing available in pcb

I disagree. Pcb doesn=92t have truly primitive objects. If it did, there =
would be nothing to prevent a user from simply drawing a buried via.

> and gerber which is the most common output. Basically layout data is =
just a bunch of drawing primitives. Footprint and via/pin/pad is more or =
less there just to hold together some primitives so movement of these =
objects get simpler.
> Primitives are: lines, circles, circle segments, polygon and cut out =
of these. As is now there are limits on there and how they could be used =
in particular for via/pin/pad. Ideally it should be possible to use all =
of them at all layers: layout, footprint/element, via/pin/pad.
> Nicklas Karlsson

John Doty              Noqsi Aerospace, Ltd.
jpd AT noqsi DOT com

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