TF1260 tips

[chucsmom69]

Hi there, i was wondering if anyone could tell me a way of running my tf1260 faster than 50mhz? It seems that anything above results in crashs, freezes, black screens and the like. Its a rev5 with FPU

[fitzsteve]

Originally Posted by chucsmom69

Hi there, i was wondering if anyone could tell me a way of running my tf1260 faster than 50mhz? It seems that anything above results in crashs, freezes, black screens and the like. Its a rev5 with FPU

In this weather could be the heat? might need some active cooling.

I think my TF1260 with Rev5 goes to 64mhz but that wasn't during this heatwave

My Rev4 without FPU ran faster stable, perhaps the Rev5 isn't the best one for OCing

[lilwshu]

Current firmware doesn't like rev5s or rev1s being overclocked. Have a look on the Exxos forum for info on it.

[chucsmom69]

Could well be - for now i have put some heat sinks on it and left the top off!

[supaduper]

what firware do you have on the TF and do you have the correct CPUSPEED clock selector , did you build it yourself ?

[chucsmom69]

when CPU speed is run it says 1000 as the firmware. I purchased from ebay and the seller has been really helpful... just figured Id ask some Amiga people if they had any tips! my last 2 TF cards I purchased from you but for some reason when I tried to use Amibay to contact you it was down so I used ebay.

[supaduper]

Originally Posted by chucsmom69

when CPU speed is run it says 1000 as the firmware. I purchased from ebay and the seller has been really helpful... just figured Id ask some Amiga people if they had any tips! my last 2 TF cards I purchased from you but for some reason when I tried to use Amibay to contact you it was down so I used ebay.

Ok, so the seller will have sent you the correct cpuspeed that runs with the 1000 firmware, so then if it your rev 5 does not overclock then it is just bad luck that that the cpu does not overclock to greater speeds, rare but it does happen

[chucsmom69]

is that the most recent firmware? and yes although I did try the other versions of CPUSPEED. also what is better no over clocking but FPU or overclockable without FPU? what is the general feeling on this?

[supaduper]

Originally Posted by chucsmom69

is that the most recent firmware? and yes although I did try the other versions of CPUSPEED. also what is better no over clocking but FPU or overclockable without FPU? what is the general feeling on this?

You have the most recent firmware 1000 on your TF1260 if that is what it tells you, obviously a CPU with FPU is preferred, but some of the LC 68060s they can be overclocked to 100 mhz again this can be acheived when they are individually tested, just to add I never had much luck overclocking the rev5 68060 and others I think have had the same issue.

[chucsmom69]

Thank you for the info - I think I will stick with this chip then for compatability with FPU software and lets be honest its not like a 50mhz 060 needs overclocking as its still magnitudes faster than my other classic machines (obviously not Pistorm Emu68 but thats not a classic chip) now to go play some games on it

[chucsmom69]

hmm seems i spoke too soon - i am getting random crashes/lockups even at 50mhz, I have been advised it could be a low 5v line so have tried the rest of Amiga PSU's and the results are even worse with either the power light staying dim and nothing else or it gets part way into workbench before black screen. when this happens if I try a reset I get stuck on a white/light grey screen hard to tell.

[supaduper]

can you show some pics of the TOP and bottom of the TF1260 ?

[chucsmom69]

Yes as soon as i get home i will post pictures.

[chucsmom69]

pics as requested! please excuse the finger print/smudges - its been so hot here and its been in and out of my A1200's all day trying to solve this issue.

[supaduper]

Yeah it is hard to see really anything from pics, I sent you a PM

[Kin Hell]

Originally Posted by chucsmom69

hmm seems i spoke too soon - i am getting random crashes/lockups even at 50mhz, I have been advised it could be a low 5v line so have tried the rest of Amiga PSU's and the results are even worse with either the power light staying dim and nothing else or it gets part way into workbench before black screen. when this happens if I try a reset I get stuck on a white/light grey screen hard to tell.

Guessing you have installed some flavour of the 680060 Libraries?

Example: http://phase5.a1k.org/index.html

You need a Rev 6 060 to get better overclocks.

If you're still crashing after installing the 060 Lib's, try & get SnoopDos running & logging in the background.

[Dale423]

1200 Needs timing fixes. There is a cap or resistor that needs removed from the bottom of the board. E125 or C125 perhaps? Don't have the specific one off the top of my head.

[Leon Besson]

Originally Posted by Dale423

1200 Needs timing fixes. There is a cap or resistor that needs removed from the bottom of the board. E125 or C125 perhaps? Don't have the specific one off the top of my head.

Or Resistors E125R and E123R. Usually the Commodore 1D4 and 2B Revision boards would be the culprits for the fixes.

Would the TF1260 suffer from this? I know it was an issue for Apollo 1240/1260 as well as ACA 12xx boards.

[Daedalus]

It's rarely an issue, but when it is, it affects any cards with tight chipset timings (fast chip RAM access speeds for example). The TF, Apollo and ACA cards all fall into this category, as well as some newer RAM cards.

[Leon Besson]

Could it also be a Kickstart ROM issue? Op hasn’t mention what they are using. Not to kick up 3.2 or 3.2.1 bashing here, but you never know Mang!