What processor in a Lucas 14CUX?

[dnb]

I can't read the chip numbers on mine... :(

[WLAcopilote]

I think I have the numbers written somewhere; I did a search on hte internet years ago and no proprietary informaiton was available. I suspect it was made as a special for Lucas. From memory it was some sort of Motorola processor but I have been to bed many times since then....what about asking Mark Adams?

I'll have a look in the meantime...

I still have some maps from various incarnations of a 3.9 or 4.2 ECU, none of them made much difference to power; they just ran it too rich. EEPROM was a 27C256 I think...

Matt

>> Edited by WLAcopilote on Thursday 26th May 16:57

[dnb]

I've got the EPROM - and read the contents too

Just no idea on the processor... The Motorola lead will be useful Thanks!

[dnb]

I've carefully removed the coating on the chip...

It is indeed a Motorola part.

ZC93116CP
54744034
TM6
CTCTAG9550

Mean anything to anyone?

>> Edited by dnb on Friday 27th May 08:24

[dnb]

Hmmm, I wonder if this is this Z80 instruction set based...

[Annodomini2]

Doubt it motorola tend to use their own instruction sets

[dnb]

ooops! I meant 68000 series.

[Annodomini2]

More than likely

[deltafox]

The bottom line:

ZC93116CP <<<<<is the part number
54744034 <<<<dunno what this is..
TM6 <<<<<or this...
CTCTAG9550 <<<<<< is the date of manufacture-50th week of 1995

The rest i can find out later.




>> Edited by deltafox on Friday 27th May 21:07

[dnb]

All I need now is the instruction set and the start address of the code

[dilbert]

How many pins does your "microprocessor" have?

Are you sure it's not just logic.

You know you can build a nice state machine from static synchronous logic, and a prom, don't you.

What makes you think that the device from Motorola is the processor?

[Annodomini2]

Will have a check at work on tues, make sure if our place designed it or not.

[joospeed]

Anyone interested in pulling in the same direction here?

Now i've got cerbera MBE remapping capability i was going to turn attention to the lucas .. seems daft us all going it alone in our own directions .. anyone for a knowledge pool maybe?

If anyone wants to discuss please contact me through my profile, thanks

[eliot]

What's the point, replace it with a megasquirt and bin that Air flow meter at the same time. If you get an old ECU, you can fit the megasquirt inside the case and make it completely plug and play.
Then you are open to the whole fun world of programable fuel & ignition, plus lots of cool features that have been developed by two guys in the UK.

Eliot.

[dnb]

I'm going for a VEMS ECU (rival to megasquirt) at some point, but yes, I'm interested in finding out as much as I can about the Lucas ECU... If nothing else, it gives me a 1st guess at the fuel map I need for the VEMS

There's no email in your profile Joospeed!

The "processor" is a 40 pin device. A bit big for "simple" logic, unless it's some kind of PLD?

>> Edited by dnb on Saturday 28th May 21:58

>> Edited by dnb on Saturday 28th May 21:59

[joospeed]

erm. [e-mail]

[dnb]

Joolz YHM.

[dilbert]

dnb said:

I'm going for a VEMS ECU (rival to megasquirt) at some point, but yes, I'm interested in finding out as much as I can about the Lucas ECU... If nothing else, it gives me a 1st guess at the fuel map I need for the VEMS There's no email in your profile Joospeed! The "processor" is a 40 pin device. A bit big for "simple" logic, unless it's some kind of PLD? >> Edited by dnb on Saturday 28th May 21:58 >> Edited by dnb on Saturday 28th May 21:59

Well fair enough I guess.

It's pretty difficult to come to any useful conclusion from your description so far.

Dja have a piccy.

I looked the part up, but no real joy. I guess that's why the context (details of other components) might be helpful.

Don't panic though I'm not going to bite anyones hand off to figure it out.

[dnb]

There's a 27C256 EPROM (one of the old UV erasable ones)
and a HD46508PA analog input IC. There's a couple of other reasonable size chips too, but I don't have the numbers handy.

[dilbert]

You see, the other thing you might consider is that the manufacturer code 'ZC' is not one I'm familiar with.

If the part has the Motorola blob on it, it could just be that Motorola manufactured someone else's design.

Notable other manufacturer codes that begin with "Z" would be Ferranti, GEC and Plessey. There are others, but these are less likely.

Since Ferranti, GEC and Plessey are/were sort of British, and so is/was Lucas, I can quite imagine a policy of collaboration between the companies.

Is it possible that you are looking at a Ferranti/GEC/Plessey device fabricated by Motorola.

Maybe it's just a red halibut!