Patches and discussion for Ensoniq VFX family

What is the difference between the VFX-SD and the VFX-SDII? How can 
you tell what you have?  I have a VFX-SD that was made in early 1990, 
but was upgraded a few months after I bought it.  I don't even 
remember what the upgrade was for I think for some chip replacement it 
is currently OS 2.1 ROM 2.0.  Does this mean I have a SDII?

I just pulled a bunch of my old midi studio equipment out of storage 
including the VFX-SD and am trying to relearn how to use it after over 
10 years.

--- In Ensoniq-VFX-SD@yahoogroups.com, "Robert Park" <rjpark@...> wrote:
>
> What is the difference between the VFX-SD and the VFX-SDII?

The SDII had expanded piano ROM, called Mega-Piano. There may be a few 
more things.

I am getting a Warning Low Battery Voltage alert come on when I turn on my VFX. Can anyone tell me about this. Thank you
 
Robert Stone