Emax

Ted I didn't forget about you, I just haven't de-racked my emax yet.  I think the list member you speak of upgraded a 2MB model, so that would fit the theory I guess?

--- In emax@yahoogroups.com, Ted Summers <djtbs1@...> wrote:
>
> The issue isn't the circuit- schematics are available.
> The issue is that:
> 1) The upgrade disks are not available.
> 2) The upgrade requires registered PALs.
> 
> So- for number #1 it may be possible to write  / copy an eeprom to update
> your memory.
> Someone on the group says they did it, but I could not replicate their
> effort.
> 
> 2) You cannot read registered PALs.
> So if you don't have the original binary (we don't), then you can't make
> duplicates of them.
> 
> Currently there is only 1 way to break a registered PAL- reverse engineer it
> using an high power (electron?) microscope to see each switch gate and map
> it out.
> The cost to have someone do that is very prohibitive, and may even be
> illegal in some countries.
> 
> There is a team / person I have contacted that is working on a piece of
> equipment to read / determine registered PAL programming, but he is sometime
> away from a usable prototype for Registered PALs. The equipment is likely to
> cost about $300 when it becomes available..
> 
> That is as much as getting a working Emax2 with memory off ebay....
> 
> Regards,
> Ted
> 
> 
> 
> 
> 
> 
> On Wed, Nov 24, 2010 at 4:14 AM, Niklas N <niklas627@...> wrote:
> 
> >
> >
> >
> > Have a few questions about memory for Emax 2
> >
> > - Does anyone know where I can get memory to Emax 2?
> > - Is there anyone who has tried to "build" memories or have a schematic
> > sketch of the memory? The circuit is quite big, so it should not be
> > difficult to build if you have knowledge of how to build a circuits.
> > Maybe someone can post a picture of how the circuit looks like and what
> > components are on it? Maybe can I make a sketch from some pictures.
> > - Is upgrade disks to memory to obtain or can someone post this on
> > formumet so you can download it in the EMX format?
> >
> > cheers
> > niklas
> > www.myspace.com/non73audio <http://www.myspace.com/non73audio>
> >
> > [Non-text portions of this message have been removed]
> >
> >  
> >
> 
> 
> [Non-text portions of this message have been removed]
>