Re: SFX Sound Expander cartridge and .... Plus/4?

From: davidt <>
Date: Fri, 17 Feb 2012 12:39:36 -0800 (PST)
Message-ID: <>
Roll on free time for Gábor!

I have a 128 here, but haven't tried the SFX Sound Expander on it, as far as
I know, it works fine, however the registers used for the SFX keyboard
overlap those used by the REU (which I don't have), regardless of if the
keyboard is used or not, so the two can't be used at the same time.

Again AFAIK, only one person replaced the OPL chip with the OPL2, but using
a 3812 in place of the original won't do any harm and has already been
noted, the only difference is the extra waveform registers in the 3812.

Don't forget about the keyboard, the downside of the SFX Sound Expander was
the lack of decent software back in the day but having the keyboard did
allow some "music" to be played.  
I had it rigged up to some circuitry a few weeks ago and it became a regular
MIDI keyboard.  A feature greatly missing on the original.

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