mikro wrote:The three wires look extremely strange (and fragile) plus we can only guess what's happening in that glued part. First thing I'll try is to change the wires for something more, erm, common and perhaps resolder all the connections to the 74F0x.
Well, it didn't help. First I removed all the glue / silicon and checked -- nope, then replaced the wires and resoldered all joints on the clock patch IC. Good news is that it's behaving still the same (i.e. I didn't break anything).
The IC is (S)74F04N (FPX0407, 9405VF for those who know what it means :-)), from what I see it's the exactly same IC as Exxos uses: http://www.exxoshost.co.uk/atari/last/f ... /index.htm
however wiring is bit different (photo taken before my changes):
(perhaps due to the PowerUp 2 box which takes care of some things).EDIT:
OK, it seems that this clock patch is 100% identical to the Atari one (version with 74F04), except:
- PIN 8 doesn't go directly to R222B but: PIN8 -> blue wire -> the box -> yellow wire -> R222B
- There's a white wire coming to U68 (and three others going to the right of the NVRAM IC)
I'm really tempted to try disabling this 'detour' and connect to R222B directly. Although I can't imagine why this detour would make the 74F04 angry and hot. ;-)
So now there are two possibilities:
1. The 74F04 has gone bad for some reason and it just needs replaced and everything will be fixed
2. Falcon can no longer work with this kind of clock patch and needs something as the one by Exxos (maybe just the wires to the box are too long, who knows).
Fortunately, I can try 1.) while waiting for 2.). Only thing which really saddens me is that I'm going to lose the PowerUp 2 in case of 2.) -- it doesn't make sense to have it with the CT60e of course but in case I'd like to keep the CT60e and sell the Falcon, it would require additional work to put it back again. Perhaps that means I shouldn't ever sell it. ;-)
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