Ok, i am stupid (but maybe that served a purpose on this one..). As I completely overlooked the second bridge on the picture so i ONLY! did the one in the corner (with the tape in between the pins).
Grabbed an A-Trend atc-5200 Via Mvp3 board that i know will post with a Tillamook but locks up during post when L2 is enabled. Worked straight away! Only did speedsys test by booting from a Gotek floppy emulator but L2 works fine. The 4x multi did NOT work as the pinout is a bit different from the normal mmx cpu so i went on and did the 4x multi mod.
(4x multi mod can be found here: Fastest Socket 7 board?) just connect BF2 to NC next to it.
Tested again and also set it at a 100mhz fsb and it worked at 400mhz with L2 2,2V! Did one run of speedsys fine and wouldn't boot anymore after that at 100fsb.... not even 3,5x 😐 😕
Worked fine at 66fsb again after a bios reset but no more 100fsb.... weird stuff and maybe the mobo acts up?
Anyway, went on testing and this is what i got so far, testing only confirmed with speedsys:
A-Trend atc-5200 : Did post before and does work fine with L2 and 4x multi
Asus P5A-B: Did not post before and does not post now.
Asus SP97-V: Did post before without L2 and now runs fine with L2 and also the 4x multi works
Asus TX97-E: Did not pst before and does not post now.
Asus TX97-XE: Did post before and posts now with L2 into Dos but after that it locks up starting speedsys (runs fine without L2!). Also 4x multi not working!? funny one...
Asus P55T2P4: I did not test this before but does work with L2 now. 4x multi NOT working and board became ''vague'' during testing/modding (see below).
Gigabyte GA-5AA: booted before without L2 and now runs fine with L2! Did not go higher as 3,5x 100fsb but it runs pretty fast like that. Will test at 4x and at that it will be the fastest option so far, even beating the mvp3 speedsys scores (as it comes close at 350mhz).
But i have to re-do the 4x mod first... During testing on the P55T2P4 (rev 3.10 , Intel 430HX) the 4x multi mod did not work (3.5 max and 2x didn't work as 4x also). So i went back to the soldering iron and ''completed'' the cpu mod as i saw that i forgot a bridge looking at the picture again. So now i had the complete mod + the 4x multi mod. The P55T2P4 would not even post any more, black screen... testing with a regular 233mmx went fine, and inserting the Tillamook again gave a black screen all over.
Quickly undid the 4x mod as maybe it collided with the other mod? Without the 4x mod still no post! Undid the last bridge from the cpu mod and yes, it booted again! But ever since it will not run speedsys and acts exactly like the TX97-XE, it goes further as without the mod but locks in dos. While it worked before... 😵 Runs speedsys fine without L2... probably broke something?
After that i tested the Gigabyte and the cpu was still working fine after all this with only the single mod done (the one with the tape in between).
SOOOOOOO, far from complete and needs a lot more testing (including OS etc.) but i can confirm it works!!! Not on every socket 7 or super 7 board but at least on some as long as they at least post without L2.
Not done yet and will later on test with:
Asus P5A
Asus TX97
Gigabyte GA-5AX
Epox Mvp3-c, Mvp3-m
Aopen AX59 Pro
DFi K6BV3+/66
asus tx97-e, 233mmx, voodoo1, s3 virge ,sb16
asus p5a, k6-3+ @ 550mhz, voodoo2 12mb sli, gf2 gts, awe32
asus p3b-f, p3-700, voodoo3 3500TV agp, awe64
asus tusl2-c, p3-S 1,4ghz, voodoo5 5500, live!
asus a7n8x DL, barton cpu, 6800ultra, Voodoo3 pci, audigy1