Uploaded some pictures. As you can see I haven't finished wiring the switches in. I did this over the holiday while I was visiting my family. Had my dad lend a hand since he's been into the radio/electronics stuff since before I was born. He's also a lot better at soldering than me
First thing I wanted to do differently was try to avoid having to cut holes in the ECU case for the switches. My plan is, instead of grounding the switches to the chassis and case, running the ground wire back to the ground pin at the ECU. That way I can have them more easily accessible. Also instead of having two separate ground wires, combine them both near the switches and run one back to avoid excess clutter. Any thoughts or comments?
Also, I wanted to include a ZIF socket since I'll be switching out chips a lot (no emulator). First thought was to place a ZIF on top of the 28-pin socket, but even with a lo-profile ZIF it won't clear the cover.
Next idea was to use a 28-pin DIP right on top of the RAM chip, but there's no way it'll clear the other chip thats nearby.
So in the end, we ended up using the 24-pin DIP as originally laid out, but soldering the resistor and other wires directly to the ZIF. This way it clears the cover just fine, but I am using a lo-profile socket (they were cheaper anyways
) so I'm not sure if a standard one would work.
Lastly, while trying to find a good spot for the ground on the ECU, my dad wasn't satisfied with damn near any spot. Checked the chip ground pins, the case itself, etc. While checking with a multimeter, the only spot he could get to come up with a ground was the right hand side (in the pic) of this diode:
He seemed pretty confident it would work fine that way and since he know more about this than I do, I was inclined to believe him. However, on the trip home, the wire broke free
So it's going to get resoldered, just gotta figure out where exactly.
Any criticisms, comments, or if anything just looks generally fubar'd let me know now before I plug it in!