Looking for a kind soul

[alka]

I am now nearly sure I have an issue with one of my PROMs (IC135 or IC137). Looking for a kind soul to help me replicate these which I am told is quite easy, relatively speaking. Of course I will happily compensate you for your troubles.

There are many reputable programming services out there such as: http://www.advin.com/IC-Programming-Service.htm, etc. that could assist in the matter.

Hoping we can together bring an EII that's been dead for a long while back to life!

feel free to spread the word and email me if you have any leads: bryan.alka@yahoo.com.

Thank you!!

[Wolfram]

I can burn it for you.
Where are you from?

[alka]

Hi Wolfram! I am in the US/ Philadelphia area. Will happily cover shipping, etc. My email is bryan.alka@yahoo.com if you'd like to email me. THX

[dr.c]

Hi,

As far as I remember they were 2764 Eproms, and not 27C64 wich are Cmos. Verify !

Its very easy to have them programmed.

[Wolfram]

Hello alka,

I'm in europe. So I think this is to fare.

[alka]

Hi Dr. C - I'm not referring to the EPROMs but rather the PROMs at IC135 and IC137 - the two custom 74S472s marked UCD0.6 and UCD11.1

[alka]

Hello alka,

I'm in europe. So I think this is to fare.

OK - I may have found someone more local.. thanks for initial offer.

[adesive80]

I'm also interested in replicate those two ICs. According to the Manual they work as "Microcontroller sound generation".

They are the only two ICs on the Digital Board that is impossible to replace (excepting from pulling out from another Emulator II).

This is because they are custom programmed from E-mu. And also they are not programmed like a standard EPROM, but I think they require a special equipment to program them.

Is this correct?

Do you think there is a way to replicate them?

[dr.c]

I have never seen these !

[alka]

I've been told that copies can be easily made from working ones with the right PROM burner. It's just about finding the right combination of someone who has an EII and the correct burner. I believe I found someone who is willing to copy his working PROMs and share the dump with me. If that is so most PROM burning services can burn the chip. Here is a handy list of equivalent chips that can replace the 74S472s (after correct programming of course) some of these are harder to locate than others....

7124 512x8 TS == 82S147,  27S29,  6349, 74S472, 28L42

[adesive80]

I've the two working PROMs (82S147) in my Emulator II and I've tried to put them in my PROM burner to make the dumps, but it seems that my burner can't read them  

Let me know if you will get the dumps, I would like to have them

[alka]

I've the two working PROMs (82S147) in my Emulator II and I've tried to put them in my PROM burner to make the dumps, but it seems that my burner can't read them  

Let me know if you will get the dumps, I would like to have them

Hi adesive80 - i just received the files and uploaded them to the EII yahoo groups file section.

[adesive80]

Thanks!!