Revised Firmware V1.4 for the DSP1124P with V1.3 ONLY! - Page 2 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #11 of 138 Old 12-19-06, 10:16 AM
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Re: Revised Firmware V1.4 for the DSP1124P

O.K. - I'll try to dig up an old 27C512 just to verify the fix. I can access a universal programmer that should easily program one of these. I'll just need to know how many folks in the Shack want one. If I go the DigiKey route, the minimum buy might get in the way unless I can think of a few other things to fill out the order. Cost to the Shack users would be my cost. Right now that looks like under $5 total, delivered, for each 27C512. Heh, postage will be more than the part itself!

Can anyone provide me the exact part number of the 27C512 inside Behringer? I haven't opened mine yet. I'd like to know the speed grade on their device so I can find a suitable part in the junk drawer today.

* What is the speed grade of these proms?
* How many people need a 27C512?
* How many people need a 27C256?
* Will Behringer honor warrantees if we open unit and swap proms? (need letter)

-Cheers
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post #12 of 138 Old 12-19-06, 10:42 AM Thread Starter
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Re: Revised Firmware V1.4 for the DSP1124P

You probably want to test the new firmware.

Maybe we could get Behringer to furnish the chips??? It's worth a shot. I'll throw them the bone anyway... it seems that is the least they could do.
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post #13 of 138 Old 12-19-06, 11:37 AM
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Re: Revised Firmware V1.4 for the DSP1124P

Quote:
Can anyone provide me the exact part number of the 27C512 inside Behringer? I haven't opened mine yet. I'd like to know the speed grade on their device
Typical HOLTEK semiconductor 70 nsec CMOS 64Kx8bit OTP EPROM.

Actual part number HT27C512-70 in a plastic 28 pin DIP.

The PDF file.

The BLURB.

brucek

* my feeling is that a fair number of people would have trouble swapping this chip out. It isn't really entry level. Getting the hard glue off would be a challenge. Then, removing a 28 pin dip and reinserting it without bending a pin or the socket would be tough for many. It ain't a PLCC socket. Large DIP sockets are tricky - not to mention ESD on old CMOS.
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post #14 of 138 Old 12-19-06, 01:38 PM Thread Starter
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Re: Revised Firmware V1.4 for the DSP1124P

Quote:
brucek wrote: View Post
* my feeling is that a fair number of people would have trouble swapping this chip out. It isn't really entry level. Getting the hard glue off would be a challenge. Then, removing a 28 pin dip and reinserting it without bending a pin or the socket would be tough for many. It ain't a PLCC socket. Large DIP sockets are tricky - not to mention ESD on old CMOS.
So it ain't gonna be a simple fix then. I'm glad I got one of the older models.
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post #15 of 138 Old 12-19-06, 03:19 PM Thread Starter
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Re: Revised Firmware V1.4 for the DSP1124P

Just passing along the information I'm receiving...

Quote:
There are a couple of ways to go about the upgrade, but they would require a hardware (blank) EPROM and an EPROM burner (no MIDI upgrade possible on these older models). If the folks on the forum are looking to purchase a new EPROM for BEHRINGER a product, these are available through our recommended EPROM supplier, Swell Sound. A link to this site is below:
http://mysite.verizon.net/resoamqr/s...ics/index.html

More contact info (email and address)...

Swell Sound Electronics
1455 Sleepy Hollow Rd.
Christiansburg, VA 24073
[email protected]

Detailed EPROM ordering information is on the Swell Sound site. Please note that Swell Sound prefers contact by email, and have therefore not provided us with a phone number. I should also note that the V1.4 firmware we provided is a "beta" revision specifically designed to attempt a fix for the problem cited in this incident - so the firmware would have to be provided to SwellSound in order for them to provide a finished, burned EPROM. You may want to consider choosing a designated volunteer to test the fix first prior to unleashing the hounds on SwellSound... ;-)

Some "obligatories" below...

We recommend using our authorized service centers to install the EPROM chip if this is not comfortable to perform by the end-user, and a list of our centers is available on our website at the following link:

http://www.behringer.com/05_support/...a.cfm?lang=ENG

Here are some warnings we tend to include as well:

WARNING
You must remove the cover of your BEHRINGER unit to add/exchange EPROMs. Electrical current from power cables can be hazardous. DO NOT REMOVE THE COVER OF YOUR BEHRINGER UNIT UNLESS YOU ARE QUALIFIED TO DO SO. To avoid personal injury or equipment damage, disconnect the attached power cords before you open the unit cover. Do not operate the BEHRINGER unit without the cover in place. Failure to take these precautions may result in personal injury and system damage.

Caution -
Do not make mechanical or electrical modifications to the equipment. BEHRINGER is not responsible for regulatory compliance of a modified BEHRINGER product. If you are not confident of your own ability to perform this action, then please contact one of our authorized service centers or the dealership from where the unit was purchased.
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post #16 of 138 Old 12-19-06, 06:36 PM
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Re: Revised Firmware V1.4 for the DSP1124P

I got the nice e-mail from Behringer today with the zip file. I sure don't look forward to opening it up and prying out a chip. Count me in if we are doing a group buy of chips.

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post #17 of 138 Old 12-19-06, 09:19 PM
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Re: Revised Firmware V1.4 for the DSP1124P

Assuming it works...

I want one! And I would gladly pay $10 shipped for the chip.

I saw this eBay auction with a programmer and 1 chip (which may or may not be "right" for our needs) for $33 + $10 S/H from Hong Kong:
http://cgi.ebay.com/27C512-Enhanced-...em130060989461

-Max
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post #18 of 138 Old 12-21-06, 01:05 PM
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Re: Revised Firmware V1.4 for the DSP1124P

Not sure the juice is worth the squeeze, but if we could get someone to flash a bunch of them, count me in. I would pay for one.
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post #19 of 138 Old 12-21-06, 04:28 PM
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Re: Revised Firmware V1.4 for the DSP1124P

I'm in the process of getting a EPROM with ver1.4 firmware. Unfortunately my programmer tools no longer support those old devices. So I've contacted hobbyrom.com They are willing to supply us with pre-programmed EPROMS at very low cost. Time and effort, this will be the easiest path for almost anyone out there.

I've already purchased two for the two lame DSP1124Ps I have. HobbyROMs had the ver1.4 firmware so you can order now or wait just a bit until I've had a chance to verify that these particular chips (type and speed grade) and the ver 1.4 firmware works. A bit of poking around suggests that the DSP1124Ps are running romless 8051-type cpus at 12MHz. If this is correct, then any 27C512 that is 200ns or faster should work fine. Behringer used 70ns chips but those would only be needed if their cpu is running at 33MHz. The crystal markings on my unit are very difficult to read so I have to go on the supposition that "?2.000MHz" means 12 MHz. Considering that the actual audio processing is done on the dedicated TMS57002 DSP engine, I think a 12MHZ cpu speed would be reasonable.

Installation of the EPROM will be trivial. The DSP1124P has very little inside and the mainboard is on edge so you can easily find and pry out that foul firmware-bearing PROM after picking off some of the glue.

On the Behringer front, I ran into a very thick brick wall at USA support. They insist that their product is not defective and we are just using it "not as intended". Doh! Anyhow, if you insist, you can get a R/A form. As long as the unit is under warranty, then they will eventually give you a number to use at a service center; and eventually you'll get your unit fixed. Without the RA number, all you'll get from your service center is a quote. I have a few quotes for them...

Seriously consider getting the prom elsewhere.

Hang in there.

-Cheers
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post #20 of 138 Old 12-26-06, 09:54 PM
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Re: Revised Firmware V1.4 for the DSP1124P

I checked with an authorized Behringer service center about the fix (not worth having someone else do the repair):

Hi Ron - Mike here from Audio Electronics. We do have the equipment to burn an eprom, and most of the time that we perform this procedure, it works just fine. Sometimes the firmware file gets corrupted, or the computer language difference from Win98 as opposed to XP with foreign (overseas) created files can be an issue, BUT if all goes well, it's not very expensive to perform the process. Somewhere between $50 and $75 (depending on any time consuming problems we encounter). If you want - send us the unit and we'll give it a go. THANKS !! Mike

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Downstairs: Oak Klipschorns, LaScala (center), Cornwall (sides), Bubinga Heresy I (rear), SVS PB12-Plus/2, Outlaw 990, McIntosh MA6100, (2) MC250, MC2100, Oppo BDP-95, Toshiba HD-A2, Belkin Pure AV PF60, Behringer DSP1124P

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