Re: Emulating a SID (or sort of)... with a 65xx.

From: groepaz_at_gmx.net
Date: Sat, 29 Aug 2020 11:27:20 +0200
Message-ID: <1999596.G923GbCHz0_at_rakete>
Am Samstag, 29. August 2020, 03:36:47 CEST schrieb tokafondo:
> Everybody building a SBC that wants sound output gets to the same wall:
> There are not sound generators, or programmable sound generators, or such
> kind of chips available like they were 30 years ago. Yes, you can get them
> a pulled ones, or old stock, or you can go the FPGA, PIC or Arduino route
> and get one of those sound cores that end being more powerful than the SBC
> itself, just to get SID or FM sound.
>
> There has been discussions about getting funcion generator chips, couple
> them to an external amplifier chip, and use them to generate waveforms based
> basic sounds.
>
> And I even read recently as having a 6502 CPU in a SBC just to generate
> sound.
>
> So... How difficult could be to get a 65xx CPU, have it generate a waveform
> with its ADSR settings, process it applying filters or whatever, and
> bitbanging it to a DAC, to generate sound?
>
> In another words: how feasible would be to implement a sort of SID (or
> whatever other generic PSG chip) engine in a 65xx chip, that could be used
> inside the same cpu, or act as an external sound chip for a main CPU? Do
> exist such a thing?

it wasnt uncommon to do this in arcade machines, for example. entirely
possible. you wont get fancy filters, but everything else isnt terribly hard
to do.


--

http://hitmen.eu                 http://ar.pokefinder.org
http://vice-emu.sourceforge.net  http://magicdisk.untergrund.net

Terror ist der Krieg der Armen gegen die Reichen. Krieg ist der Terror der
Reichen gegen die Armen.
<Sir Peter Ustinov>
Received on 2020-08-29 12:00:03

Archive generated by hypermail 2.3.0.