Awesome work. A true trash to treasure. The DIP socket of the lowest RAM chip looks broken though. And I personally would cover everything in flux and reflow, to remove any corrosion.

Benedikt wrote on 2020-08-25, 09:04:

Also: What exactly is the purpose of the rubber duck on the MT-32?

It's for rubberducking, of course.

Benedikt wrote on 2020-08-25, 09:04:

Or is that just weird exposure?

Exactly. I was surprised to see it in the camera as well 😀
Maybe some shutter speed to refresh rate issue.

Benedikt wrote on 2020-08-25, 09:04:

Also: What exactly is the purpose of the rubber duck on the MT-32?

For rubber duck debugging MIDI issues. Duh. 😉

excellent news then!!!! very nice!

Predator99 wrote on 2020-08-25, 08:49:

I would also not give up that early on the contents of the original BIOS. There was a label on the chip so why sould it be deleted if all other ICs on the card still work? Maybe there is some corssosion left on some pins which prevents reading..?

I tried cleaning the pins and even sand it a bit.
Now when I try to read the content of the chip I get different data each time I dump it.
I think that this chip is done for...

Then not everything is lost 😉

You should see a string at the beginning, in Keropis dump its "Uª ëQNEL INTERNATIONAL 1988 IBM EGA COMPATIBLE BIOS V6.04 11/14/88"

Can you already see something there?

Predator99 wrote on 2020-08-25, 11:55:

Then not everything is lost 😉

You should see a string at the beginning, in Keropis dump its "Uª ëQNEL INTERNATIONAL 1988 IBM EGA COMPATIBLE BIOS V6.04 11/14/88"

Can you already see something there?

No. There are no readable ASCII strings as far as I can tell.
Does this ROM contain character sets? I can understand the desire to salvage it if so, since it may have Hebrew characters.
Otherwise, I'm happy with the ROM keropi provided.

I don't think that there are localized EGA ROM fonts, because the EGA text mode font can be changed in software, anyway.