Emax

That is if you have 1MB RAM- if you have 2MB it may be possible to update it
someway.
Although my efforts were not successful.

I had 2 units- 1 with 1MB and one that is an 8MB.
Taking the 8MB board, I was not able to take an copy of the 8MB EPROM and
the board and just move it over.
It didn't work.

Regards,
Ted


On Wed, Nov 24, 2010 at 8:07 AM, Ted Summers <djtbs1@gmail.com> 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@yahoo.se> 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]
>>
>>  
>>
>
>


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