EII+ Problems...

[dr.c]

Your photos are nice !

Okay...
Your machine does not have a piggyback board, wich is a board that normally takes place over the white square I have drawn and connects with the highlighted connectors wich are not soldered at these places.

Take away carefully the circuits to wich I drew red and green dots and exchange them.
Be carefull to put the the right orientation and not to bend pins under.
Restar the machine and tell me if there is any change.

I would be surprised but we HAVE TO DO this test before anything else.

The reason of this : its the sound memory. A part of it us used for the machine management. If one of the memory is bad, the machine will stop working.

You said you changed the eproms. What did you do ? Put the good ones back in place !

[esynthesist]

Hey Dr C.

Just for my information (partly off topic, sorry): were there ever versions of the Emulator II+ without an additional memory board ?
I mean: the EII+ received its "plus" logo because of doubled memory capacity, which I assumed was always installed using an additional 512K memory board (the one you are referring too and which is missing on the pictures). Or did later rev 1 versions of the EII+ have other memory ICs on the digital board itself with twice the capacity of the original EII ?
I'd just like to know...

///E-Synthesist

[dr.c]

This, I don't remember. I am sure of something, tough : the NON E+ had as well piggyback boards, the first machines, for example. I don't think that E+ HAD TO have a piggyback board, just because its a matter of memoryadressing, wherever the memory is, piggyback or not. It could have been a single memory chip (big enough), if the adress was included in this chip, it would work.

[PJ-GOTH]

Hi Dr.c my friend this morning did the operations (thank you Roby for your time) that you suggested and repleced the original Eproms...
mothing is happen...
the emulator continue to do the same "error".

wait for your consideration
thank you
PJ

[dr.c]

What damn eproms did you have originaly ?
What did you do with the eproms ?
Wich are the software disks given to you ?

[PJ-GOTH]

The original Eproms: the main and the scanner both version 1.8

We did an upgrade of the Eproms:
we took the Binary Files and we upgraded the main Eprom  2.1 version
and the scanner Eprom 3.1 version

The Diskette software i think is the 3.0 because when the Emulator start to read the diskette it says Emu Software Rev 3.0

thanks

[dr.c]

Fuck.... I don't know wich versions thay should be. Its so far away, now...

Is there anyone here who can help him out ?

[PJ-GOTH]

Hi Dr, one kind user of this forum is going to send me some diskettes to try out.
I will let you know soon wich version is..
Wait for my reply
thanks
PJ

[PJ-GOTH]

Ok here I'm..
The OS version of the diskettes i will receive soon is 3.1

wait for your reply dr.c
thanks a lot

[Elmbeatz]

As I said....
I think an Emulator II PLUS should be able to read ANY Emu-II OS (from floppy), whether older or latest (3.1)...  I 'just' have a normal EII, but even that one can read any EII OS (any EII disk), and it boots.  I really do NOT think the fault is the floppies you have.

But maybe I'm wrong... 

[dr.c]

I understand, but lets be sure...
If I remember well, it was going this if we put a library disk instead of a performance one, but its such a long time, now... 17 years... I had other things to think about...

[PJ-GOTH]

I tried other diskettes and nothing happen. it does the same problem...
I tried original emulator libriary sound...and it doesn't work too...

Wait for your consideration
thanks a lot

[dr.c]

IT CANNOT BOOT with a library disquette ! It HAS TO BE a performance disk.

[PJ-GOTH]

I tried with a Performance one too...but with the same result..

Today i went to a guy who own an Emulator and we started to check some diskettes with his emulator.. they all started and works properly..

I tried the same diskettes on my emulator II+ and it didn't start...

We changed the Floppy driver as well but with no result...

Of course i cannot ask him to try to change all the CPU components because i don't want to ruin his Emulator..but maybe there is something wrong inside the CPU board..

what do you think?

thank you DR. and thank you Roby for your patient!

[dr.c]

You have apparently changed the eproms, as you said.

It seems like the sanner eprom is not matching with the main and stops the machine, that the scanner eprom may have a bent pin, or is badly programmed, or, or...