EIII Keyboard : missing IC 27 chip on the cpu Board > looking for JEDEC data!

[philippe.69]

I have a PC with Windows 98 serial port ok
it will take a real good tutorial with which you are sending with the material

explain = no  problem

[moogah]

So you're saying it's possible to actually create some new PAL chips?

Count me in as *very* interested.  My EIII was acting up before I did the CF card upgrade.. and while that probably means the problem was in the hard drive I just can't sleep well at night knowing how many of those custom chips are in there!

I live in the US and could possibly be talked into donating my working CPU board for this.

Figuring those FChips out would be a real feat!

[Alan EIII]

Hi Moogah,

that is a very kind proposition thanks!

First I'm going to make an attempt on some of the Similar pal chip that lay around like the ic11 or ic10 that can be found near the ic27 on the cpu board.

I'll bring my board at work tomorow and we'll see what comes up.
I talked with my collegues and they think that these small ic shouldn't be protected as they are just stack solution used to reduce cost.

I don't want to broke your hopes but fchip are more than likely protected as they where comming directly from the E-mu R&D

having these chip data saved would be an insurance for the future maybe someone will come with the fchip data one day : no one can tell yet.

Anyway if this attempt is successful I'll be more than grateful if you can lend me your IC27 to make a copy (of course I'll be covering every expenses)

By the way the emu reference for that ic 27 pal chip  is ip374b / emu 1188

[Alan EIII]

Hi Guys,

Today i have only good news!


It seems all the chips on the cpu board can be copied. Even the fchip! everything else is very common: pals and national geographic processors.

I have a big data I/o chip programmer in my company and the needed pal /eprom do the complete work.(I’m planning to make a backup of all the chips-i just need to get used to that machine!)

And …someone from the EIII forum have the data from the IC27 and a chip programmer and will send me the data!

My CPU board isn’t passing the test yet :some other chip look bad on the meter but I hope it will be running next month.(I’m looking for a picture of someone cpu board:I have a 10nf capacitance missing on a corner and a contact line seems cut)

I’ll keep you posted about my progress.

[mg73]

Fantastic.

[moogah]

Absolutely amazing news man!  Especially about the FChip, I was sure those would never be replaceable!

I'm very interested in getting a set of spare chips!  If you can get them made I'll happily buy them!

[moogah]

Do you still need to get a look at a CPU board?  My only camera is on my phone, but I can open my EIII up this weekend and try to take some pics.

[Alan EIII]

Hi Moogah,

Yes I'm still after a picture of a corner of the board.
I have Tried to upload pictures from mine on the forum but the attached file quota was full on the server.

I'll give it a try again after this post.

[Alan EIII]

same today>lets call the admin

[moogah]

If it's a problem with the forum, I highly recommend imgur.com for hosting images.  Really simple to use and free of bloat and malware.

I'll get mine open this weekend... sorry for the delay, but I'm sure you understand that working on these for any reason is a delicate operation and I need to clean up some desks to have enough room!

[dvdborn]

Image upload should work again.

[artbylaw]

I'm in need of help also (see "EMU EIII has burnt thingy" in this same section.
I thought I'd try and help you and hopefully I can get some as well.
I can post a pics(s) of what you're looking for - just describe what board/where on it you need.
I may even be able to send you the chip you need to copy.
Please take a look at my post about the back of a board and also I could use the order of the boards in the carraige, as I'm not completely sure they are placed in the right order.

[moogah]

Took a bunch of pics, hopefully you can see what you need

http://imgur.com/a/HMpDN

[Alan EIII]

Thanks Moogah,

thanks for the pictures
It is exactly what I needed

Your board show not cut like mine:

[Alan EIII]

A picture of the bad IC27 I need :

Artbylaw,

Your caps problem look very similar to what hapened on my board.
I'm going to compare the back of mine with your pictures.
I'll post a reply on your topic.
I keep your proposition to lend me your chip.



Also pictures of the the programmer used to copy the chips: