Result!PCB Etching (NLC)
Re: PCB Etching (NLC)
Result!1994 Lotus Esprit S4 - Work in progress
1980 Porsche 924 Turbo - Funky Interior Spec
2004 Smart Roadster Coupe - Hers
1980 Porsche 924 Turbo - Funky Interior Spec
2004 Smart Roadster Coupe - Hers
Re: PCB Etching (NLC)
Well done Steve
/ not a fooking clue
/ not a fooking clue
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steve_weegie
- Posts: 3249
- Joined: Tue Jun 28, 2005 12:40 am
- Location: Nessieland
Re: PCB Etching (NLC)
Well the car is working, and its working very well 
I've done about 5 ecu swaps so far and think i've got a setup that i like now. It's becoming painfully obvious that i really need the CAN connector to progress things further, as at the moment i'm tuning it blind and need access to the knock readings to go any further.
Its running 1.2 bar in the midrange, tailed off to .8 at 6500 revs. Certainly feels "way north" of 200 BHP, but the delivery is very smooth indeed. All in all, i think this has been a great success & i'm very happy indeed with the results. Now all i need is the CAN connection and a 3" turbo back exhaust for 300BHP
Oh, hang on.... This is supposed to be my shedbarge road car..... It's probably fine the way it is
Robin, good work on the USB BDM - that's definitly the way forward until the CAN protocol can be unlocked for logging. BTW, your endians are ok but your midians are swapped... I presume its a MC68376 rather than a MC68736
Looking at the BDM scripts I have, i would suspect that they can be adapted for the K4 ecu in some means or another. My assembler is more rusty than the titanic and I have little knowledge on the 68k series, but trivialities such as these shouldnt stop an attempt at progress
Do you have a K4 to work on? First thing is obviously to dump the ROM and see how it looks. I've got some tools that i can run it through for a first pass look
I've done about 5 ecu swaps so far and think i've got a setup that i like now. It's becoming painfully obvious that i really need the CAN connector to progress things further, as at the moment i'm tuning it blind and need access to the knock readings to go any further.Its running 1.2 bar in the midrange, tailed off to .8 at 6500 revs. Certainly feels "way north" of 200 BHP, but the delivery is very smooth indeed. All in all, i think this has been a great success & i'm very happy indeed with the results. Now all i need is the CAN connection and a 3" turbo back exhaust for 300BHP
Oh, hang on.... This is supposed to be my shedbarge road car..... It's probably fine the way it is
Robin, good work on the USB BDM - that's definitly the way forward until the CAN protocol can be unlocked for logging. BTW, your endians are ok but your midians are swapped... I presume its a MC68376 rather than a MC68736
Looking at the BDM scripts I have, i would suspect that they can be adapted for the K4 ecu in some means or another. My assembler is more rusty than the titanic and I have little knowledge on the 68k series, but trivialities such as these shouldnt stop an attempt at progress
Do you have a K4 to work on? First thing is obviously to dump the ROM and see how it looks. I've got some tools that i can run it through for a first pass look
Arriving broadside, in a cloud of smoke......
Re: PCB Etching (NLC)
I don't have a working one - I was just going to use the one off egor unless anybody has a spare they care to donate to the cause?
68376, correct.
I think the ROM is only 8K, so the majority of the action must be in the FLASH - the ROM probably just contains a boot loader plus something to do an upgrade over the OBDII port in case the FLASH is empty/scrambled. The worst case scenario is that the ROM is checking for a digital signature of some sort on the FLASH contents before booting, but we should be able to reverse engineer the key out of the ROM contents if that is the case ... will post back once I get back to Edinburgh and can finalise the layout (the tool needs to fit on the K4 BDM pinout nicely so that it can be left buried in the ECU with just a USB cable emerging from a hole somewhere!).
Cheers,
Robin
68376, correct.
I think the ROM is only 8K, so the majority of the action must be in the FLASH - the ROM probably just contains a boot loader plus something to do an upgrade over the OBDII port in case the FLASH is empty/scrambled. The worst case scenario is that the ROM is checking for a digital signature of some sort on the FLASH contents before booting, but we should be able to reverse engineer the key out of the ROM contents if that is the case ... will post back once I get back to Edinburgh and can finalise the layout (the tool needs to fit on the K4 BDM pinout nicely so that it can be left buried in the ECU with just a USB cable emerging from a hole somewhere!).
Cheers,
Robin
I is in your loomz nibblin ur wirez
#bemoretut
#bemoretut