exxos's Atari, Amiga & retro forum

8 Bit Dreams wrote: 31 Jul 2020 19:55 Have these too.. Washed with acetone and look what it is:
IMG-20200718-WA0031.jpg

Haha, I kind of expected it to be a 25Mhz tbh! It's great that they run so well!

If we believe this info http://www.cpu-world.com/CPUs/68030/Mot ... RC50C.html

Then those chips labeled RP25C are using a mask (0G40W) used for 50Mhz MC68030RC50C chips

pipper wrote: 31 Jul 2020 23:29 If we believe this info http://www.cpu-world.com/CPUs/68030/Mot ... RC50C.html

Then those chips labeled RP25C are using a mask (0G40W) used for 50Mhz MC68030RC50C chips

That is odd. Would these be double-remarked chips, or just 50MHz parts that, for whatever reason, failed tests and were sold as 25Mhz parts?

Noticed the listing had vanished from my ebay account and replaced with a message from ebay saying the removed the listing from the site. I guess too many people reported them as "fake".

https://www.nxp.com/docs/en/product-cha ... 00283.html
https://www.nxp.com/docs/en/product-cha ... 00321.html

I think at some point they just consolidated manufacturing of all 030 chips to 0.8um, yet still sold them at different price points. Could also be due to testing - its a gamble.

simon.osborne wrote: 01 Aug 2020 00:02

pipper wrote: 31 Jul 2020 23:29 If we believe this info http://www.cpu-world.com/CPUs/68030/Mot ... RC50C.html

Then those chips labeled RP25C are using a mask (0G40W) used for 50Mhz MC68030RC50C chips

That is odd. Would these be double-remarked chips, or just 50MHz parts that, for whatever reason, failed tests and were sold as 25Mhz parts?

Noticed the listing had vanished from my ebay account and replaced with a message from ebay saying the removed the listing from the site. I guess too many people reported them as "fake".

I can understand someone reporting the listing I guess - I would prefer they were just honest and sold them as originally stamped as 25Mhz chips, that use the 50Mhz die (with no guarantees on performance). Then people know what they are getting. It's a shame, I would have liked to have ordered some more (even knowing what they are). There are other sellers though - of the same thing.

GadgetUK164 wrote: 01 Aug 2020 00:41

simon.osborne wrote: 01 Aug 2020 00:02

That is odd. Would these be double-remarked chips, or just 50MHz parts that, for whatever reason, failed tests and were sold as 25Mhz parts?

Noticed the listing had vanished from my ebay account and replaced with a message from ebay saying the removed the listing from the site. I guess too many people reported them as "fake".

I can understand someone reporting the listing I guess - I would prefer they were just honest and sold them as originally stamped as 25Mhz chips, that use the 50Mhz die (with no guarantees on performance). Then people know what they are getting. It's a shame, I would have liked to have ordered some more (even knowing what they are). There are other sellers though - of the same thing.

Yeah, I'd be happy to buy them marked correctly. I've put my chip into my TF330 set up with mmulib and maprom and had it running the frontier intro on loop whilst I was working last night, and it seems absolutely fine at 50MHz. Probably a bit overkill for a CD32 but I really wanted the chip for a TF536 once some more boards become available.

pipper wrote: 23 Jul 2020 17:45 I guess I was lucky with these:
https://www.ebay.com/itm/1PCS-5PCS-MC68 ... 2749.l2649

Have an MMU and work @50Mhz in TF530/536. They all look brand new and carry identical text on them... so they might be rebranded.
I am in no way affiliated with the seller.

Listing is gone now but got mine today.. indeed remarked but runs solid. Had a remarked goldtop that would puke on Leonard's AmigAtari sound demo (is a good test btw.. gets things good and toasty!) Would always crash on Tao's Ultimate Medley part 1..

Thanks for the heads up on this one as was dirt cheap!

Best,
weav

Also managed to pick one up before the seller closed up shop.
Obvious reprint when you compare the finish to a genuine CPU.

Ran it for about 20 minutes in a TF534 with Frontier and it started to crash, temperature of the chip was about 55c (Ambient was around 22c)
May stand up with a passive heatsink who knows, but not reliable from my brief experience.

I have a number of genuine 50C goldtops these never go above 30c running Frontier 24-7.
I have one genuine 33B (95 datecode) it works well also, but mid 40c temp.

Have not tried it in a TF536, mainly because I need to get off my bum and build one :roll: maybe this weekend :!:

These seem to have got old stock for sale at a very reasonable price. I have already added some in my basket but haven't really figured out how many to buy as 4 seems to be the sweet spot for me postage wise but I don't really need four.

https://www.ebay.co.uk/itm/Motorola-MC6 ... 2339741299

FWIW I bought a NOS 060 Rev 6 from this seller and I received exactly what I paid for - a brand new legit Rev 6. In fact his first and only feedback is mine...

sugar wrote: 12 Aug 2020 10:47 These seem to have got old stock for sale at a very reasonable price. I have already added some in my basket but haven't really figured out how many to buy as 4 seems to be the sweet spot for me postage wise but I don't really need four.

https://www.ebay.co.uk/itm/Motorola-MC6 ... 2339741299