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In | In-State | Out | Out-State | Signal | Connectio |
2 | Low | 18 | Low | RDC* | |
17 | High | 3 | High | CS3* | |
4 | Low | 16 | Low | RD* | |
15 | High | 5 | High | CS2* | |
6 | High | 14 | High | UWR* | |
13 | High | 7 | High | CS1* | |
8 | High | 12 | High | LWR* | |
11 | Pulsing | 9 | Pulsing | CS0* | a.) G* (inverted) on IC128 (Data bus buffer to graphics board? b.) Logical signal in CE* of RAM (IC130 and 3 others) c.) Logical Signal in OE* of ROM0/1/2 |

Nonchalantly does a teardown and "quick change" of the gears that took me a month from start --> finish lol. Nice work!Took apart the steering assembly, wiped it down and upgraded the gears. Was happy to button it up with no missing parts or extra parts.
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Nice breezy day to pullout the ozone machine and work on the rodent smell. The cutout for the pedal assembly makes a nice duct for the ozone machine to fill the empty cabinet and vent out the top.
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I would double check the work for IC 115/130. The old parts allowed the game to boot so this is something that I'd try and sort before proceeding.Well one step in the right direction. I removed the sockets, put new sockets in, checked all the data/address lines, fixed 2 traces that I must have broken removing socketing the first RAM. I socketed IC 114, 115, 129. and 130. This is with the sockets empty.
If I put anything in IC 114/129, I get the exact same errors. If I put anything in IC 115/130, the game doesn't boot.
If DB=Data Bus, I'll recheck the data lines again. I checked for continuity on everything, but I didn't check for shorts yet.
View attachment 859898
I had to swap a chip on mine and absolutely discovered that desoldering a multilayer board is trickier than a single layer! I had one pin of the old chip that took me about an hour to get out! Installing the socket was somewhat easier but I was very worried I had mangled something by the time I was done.Thanks @ccie38296! Thinking about how it works (or should work) is a lot less frustrsting than randomly swapping chips. Not to mention my soldering skills are a high risk on this board as I have already demonstrated.I did just get a hot air station and ordered a PCB preheater, so maybe the right tools will up my game.
Thanks @GameyMcGame! It took me over a month start to finish if you count how many days went by with it sitting in my garage waiting for me to get to it.![]()


