[ischmitz]

I haven't gone through all of your data but here are a couple of observations:

PSEN and ALE look different in level. Are you using different probes or is there something wrong with PSEN?

Why are there spikes on the RST line?

Not sure how your software analyzes the data and translates it into HEX. Looks like it generates numbers when the address is not valid. But A8 and A9 do the expected thing soon after the reset telling you there is a jump executed.

You keep mentioning an EEPROM. What exact memory chip are you using and have you checked that it works by swapping it into a different box? And then confirm that the jumper settings on both boxes are identical. The logic PCB has several jumpers near the EPROM socket that configure it for various EPROM sizes. This affects how the higher address lines A12, A11 and some other signals are routed to the socket. All this applies to the 911 3.2 DME but might also be the case for your version.

While I disagree with Loren's social skills he has a valid point in that you only need clock, a working latch and the EPROM with proper contents for the 8051 to begin producing a square wave on P1.4 (pin 5). The early startup appears good so maybe the 8051 doesn't see the upper 4k of the EPROM contents?