Emax

Hello Dave,

While you can physically install the daughter board in your Emax II keyboard, the memory will not 
be recognised until the internal Emax II EEPROM is updated. But to do that you need to run a 
memory install disk which will write some data into the EEPROM. These install disks are 
unfortunately rather rare. But its possible someone on the list may have one, or a copy of the disk 
image to enable you to make your own. The only other alternatives are to use the adjust features 
option in the diagnostics menu  to perform a manual install or to remove and hack the EEPROM 
directly. I don't know what the manual install codes are, or what bits to hack on the EEPROM, so 
these are probably not great options :P

BTW, the daughter board only has a maximum of 6MB of RAM installed. The Emax II motherboard 
will have either 1MB or 2MB. It is possible to upgrade a 1MB motherboard to 2MB by replacing the 
RAM chips with a higher capacity chip and changing some PALs. But I think even this upgrade 
requires a change to the EEPROM, so you are stuck with the same problem... Actually, I just did 
some checking and it seems the daughter board also requires different PALs to be installed if it is 
used with an Emax II with 1MB base RAM compared compared to one with 2MB base RAM. 

Something else you could consider is transplanting the motherboard from your Emax II rack into 
the Emax II keyboard. Because the motherboard comes with the EEPROM, the keyboard would 
then be able to use the daughter board and have 8MB of RAM. I believe the motherboards are 
identical, but I cannot be sure. One small difference between the rack and the keyboard is that the 
keyboard allows you to set the LCD contrast from the master menu whereas the rack has a trim 
pot mounted on the front panel that must be manually adjusted. But it is possible this difference is 
only to do with the front panel board and not the motherboard itself.

/Tristan  

Tuesday, December 30, 2008, 1:31:40 AM, you wrote:

>
Hello all,

Well, it looks as if my Emax II is beyond repair, (Output board, and power supply not 
working), but I'm getting it checked over anyway, just in case it can be repaired.
If I can't get it repaired, I have an option to improve my Emax II keyboard. My Emax II rack 
was fitted with a daughter board, with 8MB of RAM, (7MB on daughter board, 1MB on main 
board?). 
It would be great if I could install the daughter board in my Emax II keyboard, along with the 
RAM......how would I go about doing this?
My Emax II keyboard has 1MB RAM, and has the stereo option.
And help with the above would be greatly appreciated.

All the best

Dave

 
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