Emax

It is possible the 8MB EEPROM image did not work in your 1MB Emax II
because the base RAM is different. It would be interesting if you
could get a 3, 5 or 7MB EEPROM image to try. I think the EEPROM must
also store the configuration of the sampling hardware because when the
EEPROM had a problem being read on my Emax II with 8MB and stereo
sampling it would only allow mono sampling and reported 2MB of RAM.

/Tristan

Thursday, November 25, 2010, 12:09:44 AM, you wrote:

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

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

TS> Regards,
TS> Ted


TS> On Wed, Nov 24, 2010 at 8:07 AM, 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]
>>>
>>>  
>>>
>>
>>