Emax

Hello Tristan,

Many thanks indeed for your reply. I think the motherboard swap sounds like a very good 
option.....I'm going to take the two units apart today, and see if I can create a working 
8mb keyboard!!
I'll let you know how I get on.

All the best

Dave





--- In emax@yahoogroups.com, tu@... wrote:
>
> 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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