[Schrade]

Originally Posted by tpepmeie

Basic works fine for >700 bhp normally aspirated. Seriously, though if you're looking for NOS control through the ECM, or boost, or traction control, or out of the ordinary things... just get an aftermarket controller. Patching 25-year old assembly code for a very limited application (read-not 4th gen F-body, or Turbo Buicks) is just not worth it.

All IMHO.

Do you really think it's not worth it?

Aren't we hoping to see this YZ Series cars' value approach original sticker prices??? I would surely think that that WOULD make it worth it...

Would a hexadecimal editor allow reading of code? Never used one, but I'm marginally familiar with them. And for the car, I will GET familiar.

Originally Posted by scottfab

I don't know that it's ever been posted. (OS listing) I did some development work back in the late 80s using the same CPU as is used on the ECM. It's a motorola varient of the 68HC11. The development setup from Motorola for the 68HC11 came with an OS known as "Buffalo".

Looks like a BIOS version...

The idea was to add your own code to the outside of the OS. I remember it was "message based". Any task that was ready to run then ran and posted "messages" to the OS and/or other tasks.

In the instance of our ZR-1 ECM the only thing the "chip" is used for is for data tables. No executable code resides in it. The executable code is flashed to an eprom internal to the CPU.

Boy, if we could get hold of the internal code listing. It may be possible to optimize it. The internals can be erased and reprogrammed. Seems to me there was a power up mode where a few key pins are looked at as to where to boot from. And an external setting combo of those pins would turn over the first address read to be external. From there one could put some op codes together to read the internal code and push it out the serial line. hmmmm
I could work myself up into a froth of curiosity here. Thing I don't know is if those pins exist and are functional on the actual ZR-1 ECM CPU. It would make sense for them to be deleted or rendered in effective to prevent reverse engineering.

Anyone know anything or someone that may know something?
This needs it's own thread.

YES IT DOES NEED ITS' OWN THREAD.

I think there are a few here who do know it already, who won't post up since it will hamper their revenue source, or it will be an intellectual property issue (but as a TARP bailout funder - i. e.; taxpayer, I'm PART OWNER!!!).