Re: Looking for a specific Echo Plus disk

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From	cybernesto <cybernesto@macgui.com>
Newsgroups	comp.sys.apple2
Subject	Re: Looking for a specific Echo Plus disk
Date	Tue, 22 Feb 2022 17:14:32 -0000 (UTC)
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> Hi, can you clue me in as to how the second AY is addressed on the Echo+
> so
> I can fix the issue?  I haven't been able to find any decent technical
> documentation on the card.
> 
> Cheers,
> -RB
>

Hi RB, the ECHO+ uses the BC2 line to enable one or the other PSG. BC2_1 is
connected to PB3 and BC2_2 to PB4. I actually managed to build this change
and it worked like a charm. I created a pull request. Let me know what you
think or if you need any further info. 
I saw a TODO about finding a hi-res picture of an echo+ card. Was it for the
reverse engineering or for documentation purposes? I can try to scan mine if
it's still necessary. There were two versions of it. I have the mono version
only.

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Looking for a specific Echo Plus disk Jayson Smith <jaybird.qxz@bluegrasspals.qxz.com.qxz> - 2022-01-28 01:46 -0500
  Re: Looking for a specific Echo Plus disk cybernesto <cybernesto@macgui.com> - 2022-01-28 15:56 +0000
    Re: Looking for a specific Echo Plus disk Jayson Smith <jaybird.qxz@bluegrasspals.qxz.com.qxz> - 2022-01-28 13:06 -0500
      Re: Looking for a specific Echo Plus disk cybernesto <cybernesto@macgui.com> - 2022-01-29 09:54 +0000
        Re: Looking for a specific Echo Plus disk Richter Belmont <messdrivers@gmail.com> - 2022-02-18 19:42 -0800
          Re: Looking for a specific Echo Plus disk cybernesto <cybernesto@macgui.com> - 2022-02-22 17:14 +0000

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