Re: did anyone actually try this MPS6550?

On 12/29/18 7:01 PM, Francesco Messineo wrote:
> On Sat, Dec 29, 2018 at 6:09 PM Gerrit Heitsch
> <gerrit@laosinh.s.bawue.de> wrote:
>>
>> On 12/29/18 5:17 PM, Francesco Messineo wrote:
>>> Hi all,
>>> I've seen this on ebay:
>>>
>>> https://www.ebay.it/itm/MPS6550-Semiconductor-MAKE-Generic/173533300388?hash=item28676406a4:g:OR4AAOSwamhbmo8W:rk:2:pf:0
>>>
>>> no pictures... 57 sold...
>>> I wonder if someone on this list actually bought one and can confirm
>>> it's the real 1kx4 2001's SRAM.
>>> A friend of mine did buy a few HF mosfets from littlediode some years
>>> ago but they were fake devices.
>>> Just checking, my 2001 could like to have 8 more 6550s if those are not fakes :)
>>
>> I know the dealer, bought a MOS 6570-036 (Keyboardcontroller Amiga) from
>> them a while ago, had no problems.
> 
> yes, I know most of the parts are probably ok, but they can't check
> every component of course. In my previous experience (the HF mosfets)
> they looked like the original part, but were counterfeit, not even the
> same pinout. Of course I don't mean they did sell counterfeit parts on
> purpose (they also gave a full refund) but they surely don't really
> check what they buy or stock.

And even if they check, by the time it reaches you, a more than 30 year 
old IC could still be dead.

So it's a bit of a lottery. If you win, you get replacement RAMs for 
your PET, if you lose, you lost a bit of money.

  Gerrit