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Re: TF536 IDE speed
Posted: 01 Jul 2020 19:49
by 8 Bit Dreams
Congratulations!
You've got a fake CPU, if You look under the scope - you'll see that this is 68030RC25B
IMG-20200624-WA0008.jpg
bought 10 from him - all are reprints, some work @50Mhz, some not, but fact is these are 25B
Re: TF536 IDE speed
Posted: 01 Jul 2020 20:07
by PhilC
If the writing looks too clean then its not a real 50 in my experience.
Re: TF536 IDE speed
Posted: 01 Jul 2020 20:34
by terriblefire
Amazing that the nuts design of the 330/536 will allow those chips to run at all at 50Mhz.
Re: TF536 IDE speed
Posted: 01 Jul 2020 20:39
by alenppc
terriblefire wrote: 01 Jul 2020 20:34
Amazing that the nuts design of the 330/536 will allow those chips to run at all at 50Mhz.
The 330 was way more tolerant though. But very very few 33s run at 50 on the 536, in fact I have switched now to RC40Cs which seem to do a lot better.
Re: TF536 IDE speed
Posted: 01 Jul 2020 20:59
by kulamario
Grate news lads
Am so happy :(
Re: TF536 IDE speed
Posted: 01 Jul 2020 21:25
by arkadiusz.makarenko
alenppc wrote: 01 Jul 2020 20:39
terriblefire wrote: 01 Jul 2020 20:34
Amazing that the nuts design of the 330/536 will allow those chips to run at all at 50Mhz.
The 330 was way more tolerant though. But very very few 33s run at 50 on the 536, in fact I have switched now to RC40Cs which seem to do a lot better.
This is what I don't understand.
Is it that CD32 is more tolerant than A500?
Re: TF536 IDE speed
Posted: 01 Jul 2020 21:43
by arkadiusz.makarenko
Yup my cpu is fake as well. My "50Mhz" is 100% reprint as it was extremely easy to remove markings. But can't read what it was before.
Non of my 33Mhz or 40Mhz manage to be stable on TF536
Quest for 50Mhz capable cpu continues :)
PS
Most of them do work stable on TF330!
Re: TF536 IDE speed
Posted: 01 Jul 2020 21:51
by terriblefire
Im a bit confused about the 330 vs 536 thing...
Mostly because not only is it the same verilog code in both boards but 66% of the traces are identical. Its a literal copy and paste job.
Strange.
Re: TF536 IDE speed
Posted: 01 Jul 2020 22:56
by 8 Bit Dreams
arkadiusz.makarenko wrote: 01 Jul 2020 21:43
Yup my cpu is fake as well. My "50Mhz" is 100% reprint as it was extremely easy to remove markings. But can't read what it was before.
Non of my 33Mhz or 40Mhz manage to be stable on TF536
Quest for 50Mhz capable cpu continues :)
PS
Most of them do work stable on TF330!
Arek, You managed to buy a CPU with non-existing mask... :lol:
Guys, don't worry too much about these fakes, it doesn't matter whats printed on it, only does it work @50Mhz or not matters... 🤔
Re: TF536 IDE speed
Posted: 01 Jul 2020 23:33
by arkadiusz.makarenko
8 Bit Dreams wrote: 01 Jul 2020 22:56
arkadiusz.makarenko wrote: 01 Jul 2020 21:43
Yup my cpu is fake as well. My "50Mhz" is 100% reprint as it was extremely easy to remove markings. But can't read what it was before.
Non of my 33Mhz or 40Mhz manage to be stable on TF536
Quest for 50Mhz capable cpu continues :)
PS
Most of them do work stable on TF330!
Arek, You managed to buy a CPU with non-existing mask... :lol:
Never checked, mask :lol:
It is not that I wasn't aware that it was fake when I was buying it. It was too cheap to be true ;)