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couriersud
Reged: 03/27/07
Posts: 214
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Re: Net list questions
11/23/13 11:39 PM


> Netlist is purely for discrete games; as I understand it it's over-accurate and
> under-performant for discrete sound. But we may yet be surprised.

It started out as being purely for discrete games. However, quite early in the process I started to realize that I would need "discrete" macro models as in discrete sound again. That's when I started to design the object model to be scalable to pure "analog" devices like resistors and capacitors.
The work got interrupted (job, health and family) for quite a while. However, I managed to have some time here and there to evaluate different approaches to analog circuit simulation. This convinced me that a mixed signal simulation should be feasible now.

Currently, I have a NAND-Multivibrator working (at the end of the pong netlist in pong.c). That's a start. The diode model (Shockley) works as well. For speed, it needs to be exchanged to a linearized model. Even this will be more accurate than the 0.7V the current discrete core assumes.

It's still a long way to go, though.

Accuracy was not the only driver. Currently, only Derrick Renaud and myself are left. The last work on the discrete core has been years ago. It served its purpose well at that time. However, we need something easier. Designing models with the discrete core for somebody without knowledge about it has a very slow learning curve.
With the new netlist code also newbies should be able to translate schematics into netlists. Just because you only take e.g. R38, connect terminal 1 to terminal 1 of C41 and terminal B (Base) of Q13.

NET_C(R38.1, C41.1)
NET_C(C41.1, Q13.B)

the code beneath will take care of nets.

Hope this summarizes the direction.

Edited by couriersud (11/23/13 11:43 PM)







Entire thread
Subject Posted by Posted on
* Is Pong more accurate in MAME or DICE (or is it a tie)? RPOR6V 11/19/13 05:10 AM
. * Re: Is Pong more accurate in MAME or DICE (or is it a tie)? R. Belmont  11/21/13 07:51 PM
. * Re: Is Pong more accurate in MAME or DICE (or is it a tie)? gregf  04/14/14 10:36 AM
. * Re: Is Pong more accurate in MAME or DICE (or is it a tie)? Envisaged0ne  11/22/13 01:11 AM
. * Net list questions Antny  11/22/13 12:02 AM
. * Re: Net list questions R. Belmont  11/22/13 05:24 PM
. * Re: Net list questions gregf  12/18/13 10:26 PM
. * Re: Net list questions Traso  12/20/13 09:22 PM
. * Re: Net list questions Anonymous  11/22/13 06:09 PM
. * Re: Net list questions R. Belmont  11/22/13 06:28 PM
. * Re: Net list questions couriersud  11/23/13 11:39 PM
. * Re: Net list questions Matty_  12/20/13 07:59 AM
. * Re: Net list questions couriersud  12/24/13 04:17 PM
. * Re: Net list questions Sune  11/22/13 02:46 AM
. * Re: Net list questions gregf  11/22/13 03:45 AM
. * Re: Net list questions Anonymous  12/20/13 07:45 AM
. * Re: Net list questions couriersud  12/24/13 04:13 PM
. * Re: Net list questions Anonymous  12/25/13 11:33 AM
. * Re: Net list questions Antny  12/20/13 10:05 PM

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