Synth-DIY Yahoo! Groups Archives

Thread

new EPROM REV procedure

2013-03-16 by james meagher

Okay, I've installed my four Rev9 EPROMS into my Polaris. Below are the procedures to follow, but I've got some questions about them right off the hop:

Procedure

Save the programs and sequences on cassette.
Disconnect line power and open the Polaris.
Remove four 2764 EPROM's from sockets Z10, Z11, Z12 and Z13. Carefully install two 27128 Revision 9 EPROM's in Z12 and Z13 making sure that the notched end of the EPROM goes to the pin 1 end of the socket and that no pins get bent. Sockets Z10 & Z11 remain blank. - I assume that if I have the version with all four Rev9 EPROMS instead of two that I just put all four in right now at this step?
Move the jumper connector located near the left rear corner of the main board (next to C819 and Z19) so that the center pin shorts to the rear-most pin.
Press LOWER FUNCTION – D - 12 STOP.
Press LOWER FUNCTION – TUNE ALL. Move the master slider to maximum, then back off to about 1/4.
Select A-1 in the Bank Select/Program Select section; now you should have a "scratch sound."
The LED above the master slider must be off. If on, turn it off to establish the volume mode. The assignable volume must be on and set to about 1/4.
Put a scratch program in the main workspace. (Select A-1)
Press LOWER FUNCTION - A.
Press 1 and move the master slider down to its minimum position. If already at minimum, move it up and back.
Press 2 and move the master slider up to maximum.
Press 3 and move the master slider down to minimum.
Press 4 and move te master slider up then down to minimum.
Press 5 and move the master slider to its maximum position.
Press 7 and move both levers (not sliders) through their entire mechanical ranges. Set the master slider to 1/4.
Press 8 and move the pedal through its range.
Press 9. Select VOLUME on the Assignable Control and set the slider to 1/4. Play 6 different notes, 1 at a time. After releasing each note, move the MASTER slider up until you hear the note bleeding through, then back off until it just disappears. If this adjustment is not set properly, notes will decay abruptly or the velocity will be too sensitive. Playing 6 notes adjusts each of the 6 channels.
Press B. Turn on LED's 1, 2, 3, 7, 8, 9, 10, 11 and 12. Turn off LED's 4, 5 and 6.
Press C. Turn on LED's 1 and 2. Turn off all others.
Press K. Turn on 1 and 7. Turn off others.
Press LOWER FUNCTION to return Polaris to normal operation.
LOAD programs and sequences from cassette.

--
C'est La Guerre Moving Pictures Inc.
364 Home Street
Winnipeg, Manitoba
R3G 1X4
(204) 918 9317

Re: [chromapolaris] new EPROM REV procedure

2013-03-16 by David Clarke

> ... *I assume that if I have the version with all four
> Rev9 EPROMS instead of two that I just put all four in right now at
> this step?

Yes.

If the number of old EPROMs and new EPROMs are the same - then you just
take out the old ones, and put in the new ones (and so don't need to
follow step 4 in the earlier noted procedure - which is a jumper change
to tell the Polaris to handle 2 chips instead of 4).

David Clarke

Re: [chromapolaris] new EPROM REV procedure

2013-03-16 by w.james.meagher@...

Thanks David.

I got through the entire procedure, but while completing step 18, I found that I could still hear each of the six notes bleeding through even when I took the master slider to minimum. Should I be concerned about this?

Also, is it possible for patches to appear in different locations after loading all programs post an EPROM REV change???

Cheers,
James

Sent from my iPhone

On 2013-03-16, at 15:57, "David Clarke" <ac151@...> wrote:

>> ... *I assume that if I have the version with all four
>> Rev9 EPROMS instead of two that I just put all four in right now at
>> this step?
>
> Yes.
>
> If the number of old EPROMs and new EPROMs are the same - then you just
> take out the old ones, and put in the new ones (and so don't need to
> follow step 4 in the earlier noted procedure - which is a jumper change
> to tell the Polaris to handle 2 chips instead of 4).
>
> David Clarke
>
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>

Re: [chromapolaris] new EPROM REV procedure

2013-03-16 by David Clarke

> ... I got through the entire procedure, but while completing
> step 18, I found that I could still hear each of the
> six notes bleeding through even when I took the master
> slider to minimum. Should I be concerned about this?

For this adjustment, were you able to hear a difference when you
initially moved the slider 'up' (e.g., to hear the sound break through)?
If so - was there a marked change when you moved the slider down - or
did it break through when going up, and then no change at all when
moving down?

> Also, is it possible for patches to appear in different
> locations after loading all programs post an EPROM REV change???

If they were loaded via cassette (or as a audio load), and if that load
completely succeeded - then they patches should not be in different
locations.

That said - the patches get loaded in order - and so if something caused
the interface to hiccup, or if the load was restarted in the middle, you
might find that patches are missing or weren't put in the right
directions.

If the patches were loaded via SYSEX - then again, if everything wen't
well - then everything should be in the right place.

In summary - as long as the loads were completed successfully, all
programs should end up in the same place with the new firmware version.

Re: [chromapolaris] new EPROM REV procedure

2013-03-17 by james meagher

> For this adjustment, were you able to hear a difference when you
> initially moved the slider 'up' (e.g., to hear the sound break through)?
> If so - was there a marked change when you moved the slider down - or
> did it break through when going up, and then no change at all when
> moving down?

I could definitely make the sound louder by moving the slider up, and
quieter by moving the slider back down again. But even at the slider's
minimum setting I could still hear the sound coming through slightly.
So basically all six notes got set with the slider at the bottom.
Though I don't know if I can say that the sound "broke through" when I
initially moved the slider up, because it was already quite present
before moving the slider up . . . but moving the slider up did make it
louder, and moving the slider down did make it quieter . . . just not
completely inaudible.

> If the patches were loaded via SYSEX - then again, if everything wen't
> well - then everything should be in the right place.

The Save All and Load All were all done via the tape interface. I
didn't realize that it was possible to save and load ALL patches via
SysEX - I've only done one at a time via SysEX.

Cheers,
James

--
C'est La Guerre Moving Pictures Inc.
364 Home Street
Winnipeg, Manitoba
R3G 1X4
(204) 918 9317