H949 PROMs

[moby]

Is it possible to obtain programmed 74S288 PROMs for the H949 Harmonizer?. I have an H949 in which pin4 of PROM #8 is giving a bogus output. Alternatively, armed with a binary, I could create my own using a fast EPROM of flash chip.

Cheers

M

[nickrose]

moby wrote:

Is it possible to obtain programmed 74S288 PROMs for the H949 Harmonizer?. I have an H949 in which pin4 of PROM #8 is giving a bogus output. Alternatively, armed with a binary, I could create my own using a fast EPROM of flash chip.

Alas, we have neither binaries nor spare proms – these will all have been lost or hidden long ago. Hopefully someone somewhere has a parts unit ..

 

[bsilverberg]

moby wrote:

Is it possible to obtain programmed 74S288 PROMs for the H949 Harmonizer?. I have an H949 in which pin4 of PROM #8 is giving a bogus output. Alternatively, armed with a binary, I could create my own using a fast EPROM of flash chip.

Cheers

M

I can help you with the PROMs and have the mapping at each address if you wanted to roll your own. Some proms were programmed differently depending if they were in a 949 with the DeGlitch board. Let me know if you’re still needing this. Best, Ben

[Safaristep]

Hello Ben, i have some problems with my 949 and some proms are faulty, could you help my getting the program to burn new proms ?

thank you !

[Plutoniq]

I’ve managed to copy the PROMs from my deglitched unit, though it’s a restoration project.

Ben, could you provide the CRC on your PROMS so I can verify that mine contain the correct data.

I notice that my AM2901’s run super hot to the touch, and even the PROM’s get hot.

The right side of my unit where the voltage regulators are attached to the case also get hot, not warm. Almost too hot to touch.

[BristolAudioRepair]

Hi, sorry folks but I am gonna revive this 4 year old thread sorryyyyy

Got an Eventide H949 on the bench,  what seems like 8 or 9 corrupt PROMs, all reading weirdly compared to original bin files (from what I assume is deglitched PROM versions)  i took them from here: https://dbwbp.com/index.php/9-misc/37-synth-eprom-dumps

Im reading that some of the PROMs are different on the later models that have the deglitched option board (algorithm 3 etc). So I think I’m going to need to source BIN files from an Early non deglitched unit?

Anyone that still looks at this – any help much appreciated, would love to revive this poor beastie

cheers,
Emil

[Author]

Posts