Yes definitely need to pull your current EPROM and install a 28pin socket (I don't think has to be ZIF). This is so the Ostrich emulator can be connected, and (later) re-tuned ROM inserted
I've been studying moates' related products (moates.net products for Honda/Acura) and now I'm contemplating their 2TIMER product. It piggybacks a 27SF512 chip (64K) into same socket and provides ability to switch between two programs / tunes. Looks like this will allow switching between two 32K segments (i.e. two whole tunes), where 32K is size of our standard 27C256 ROM. Also need to ensure it will sit inside our ECU box.
In any event we'll also need a EPROM burner - to program the 27SF512 chip (e.g. Moates BURN2 or others mentioned by Matt above), so we can drive the car with the new tune but without a PC in the passenger seat!
I would not consider my engine "modded", it's all stock NA1 other than RDX injectors, GTLW exhaust and Top Speed Headers, with wide band AEM O2 sensors. Although this is the FI sub-forum my interst is NA for now. FI with tuned OEM ECU is appealing down the track (maybe).
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Thanks Matt ... yet another good resource. And I'll keep an eye on your google drive for those datasheets
I completely understand why you're holding assembly code and datalogging solution close to your chest for now, but do keep us posted on any developments. I am running several other projects using Arduino (ATMEL MCU) to "instrument" my NSX. I already have RPM, GPS, O2, temperatures etc displayed on LCD, and will soon be looking into interfacing Arduino <=> Android via bluetooth so I can display output data on Android screen. Clearly an overlap here.
What do you think of using moates 2TIMER as I described above (with 27SF512) to provide quick access to 2 complete tunes ?