OBehave

I'm in the process or sharktuning my 85 TS project and I can't use the PEMS that I have for the 87 and up. So I have to burn new chips when the mapping is done. So where does a person buy new chips to burn new maps and does this mean I have to burn a new chip everytime I change something or are they reprogrammable? Are they the same for the EZF \K also? Anyone have a part number or supplier for these?
Thanks in advance,
Ed

John Speake

Hi Ed,
Yes you have to blow a EPROM each time.... these are the chips and the supplier I use...
http://www.futurlec.com/Memory/2732A-200.shtml

Used in both LH2.2 and EZ-F.

This is a suitable prgrammer... http://www.batronix.com/shop/program...rogrammer.html

HTH

OBehave

Thank you John.

PorKen

Ed - the LH takes a 2732(A), the EZF takes a 2716 or 2732(A), but the ST1 only makes 2732 sized BINs.


2732 EPROMs have different voltage requirements for burning, EG 2732 vs. 2732A, and come in various read speeds, usually indicated by a dashed one to three digit number after the part number, EG. -1 or -100 for 100ns, -25 or -250 for 250ns. I have used up to -45 without issue, but the faster, the better.


I bought NOS 2716 and 2732A EPROMs in bulk from eBay. Note that 2716 and most of the old 2732(A) chips require a burner with an external power supply. The USB powered burners can only burn a small selection of 'newer' 2732s, and/or the softare does not have definitions for older EPROMs.

You can write and erase EPROMs thousands of times. You'll need a EPROM eraser UV-light box to clear them. Depending on the eraser box and EPROM type, it will take 10-30 mins to erase, so you'll need a handful of EPROMs if you make rapid changes.


I bought an old BP Micro industrial EPROM burner (CP-1128) from eBay. This can burn just about anything. (You can still download software for the older BP Micro burners.) I use it with a slaved old laptop with a parallel port. Someday, I'd like to have a smaller USB one, like the Pocket Programmer.


For 'offline' LH2.2 and EZF tuning, with a few more options, here are some TunerPro definitions I made: https://rennlist.com/forums/928-foru...f-xdf-tp5.html

danglerb

24 pin eproms are getting pretty ancient in electronic/computer years, but there used to be eprom emulators for them, a little googling found some old circuits, but no idea how practical it would be to resurrect some old design. Depending on frequency of burning chips and how many of us would be actively burning chips it could be worth the effort to make something modern, maybe even wireless.

What about some of the ebay USB burners, the Genius G540 or G840 or the Moates? ($50 to $110 or so) A universal programmer for other projects would be nice to have.

I've got some old expensive burners, thinking a DataIO 280, and one I built for the Apple II that used the scream from the original Castle Wolfenstein game as the burn starting sound, but drivers etc not to mention size would be pesky.

PorKen

The Moates Ostrich 2.0 emulator kinda works on the EZF, but takes a lot of effort to get working on the LH, and usually just ends up cycling the injectors, flooding the engine.

None of the USB powered burners will work for 2716, or most 2732(A). They just don't have enough power.

The ST1 is amazing in how well it works with these old brains, which are basically oversized relays. (The GTS kickdown relay has more processing power.)



Fun fact: the CASIS shift light has the same EZF/LH processor, 2716 EPROM, A/D converter, etc., all built into the tach.

John Speake

The Batronix I gave the link to works fine with the 2732A, and is USB pwered. I have one...

PorKen

The Batronix works with a few 2732A, but not all. (I tried it.)

Most 2732A require an honest 21V input to program (2732 = 25V).

Some 'newer' 2732A will program using a lower voltage, so the Batronix does work for those.

John Speake

It works with the SGS Thompson 2732A device that I specified.....

danglerb

I kind of wondered about emulating the processor instead of the eprom so data collection could be done with the same device, but I don't see this as being that long of a design cycle. A flurry of activity for a few months, then nothing but fuel maps for tweaking changes.

Option to consider would be to make an adapter socket to use 27256 chips with a small selector switch to pick from 8 different 2732 images.

John Speake

I have had some adaptor boards made up to use 27256 EPROMs in the 2732A socket. No selectable maps though.