Emax

The SE update disk updates an 93C06 EEPROM with a couple of bits that
ENABLE the SE functionality.

It doesn't update the boot  EPROM firmware or change the menus, in of
itself.
Then there is the OS that is on the SE update disk.
This adds the SE functionality to the menus.

Where you are booting from a NON-SE disk, the SE enable is still in this
EEPROM, but you don't have any of the options in the OS...

Where a unit doesn't have SE, booting from the disk will tell you it is
updating the unit if it is a new disk.

It is a once use disk in that once a unit is updated, you cannnot use the
same disk to update another unit.
From there, the disk is usable to boot and has a sound bank to explore the
SE functions.

I have found no negative effects from using a new SE update disk on a unit
twice.... it would only rewrite the same bytes it already wrote- if
anything.

That is my experience / knowledge of it.

Thx,
Ted


PS- The only other thing that may be of note, is it may be useful to
recalibrate the machine booted from an SE capable OS disk and see if
anything changes.


On Tue, Mar 12, 2013 at 3:41 PM, geri.echue <geri.echue@...> wrote:

> **
>
>
> I own a standard emax 1 rackmount, not an SE or a HD. When I purchased the
> machine it came with a number of floppy disks. Everything seemed to be
> working fine until I entered an emax SE upgrade disk which had a label on
> 'upgrade disc use once only'.
> Since then, the sounds on certain disks have an added high frequency
> hiss/white noise on top of them.
> Also when I try and sample any audio into it, the same added hiss occurs
> on top of my audio.
>
> Since then, certain disks loaded with synths samples work without the
> white noise but I've tried copying these onto a blank disk and deleting the
> samples, and then recording audio into it, but it still adds the noise on
> top of it.
> I tried putting operating systems (that are compatible with the emax 1) on
> an emax formatted disk using OMIFLOP and EMXP program. When some of these
> are put in the emax, they load up but the display reads 'bad bank data'.
> With other operating systems, they load up fine, but still the white noise
> occurs on top of samples/ or when recording audio.
> Someone told me, that if you can filter out the high frequency sound with
> the low pass filter, which i can, means there is nothing wrong with the
> machine, you've just corrupted your disks/samples.
> What I think I've done, is that when I put the upgrade disk in, this put
> the SE Upgrade on for the second time. As since then I can't record any
> audio without white noise.
>
> This is driving me crazy, could anyone help?
>
> Geri
>
>  
>


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