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Anyone know if this is a solder down CPU or just an odd CPU in a socket?
Posted by: lem150 on 2026-05-17 09:40:10
Screenshot 2026-05-17 at 12.39.09 PM.png
Posted by: MOS8_030 on 2026-05-17 09:58:01
Interesting interposer. Just from the photo it's hard to tell if it's PLCC-to-PGA or BGA.
Posted by: lem150 on 2026-05-17 09:59:23
ugh ok I asked the seller to try for a side photo, I didn't know they did soldered down 040
Posted by: Phipli on 2026-05-17 10:16:56
It's a QFP (soldered CPU) on an adapter into a PGA (pins) socket.

You see them occasionally. There is a listing for one somewhere in Europe ATM, not sure if this is the one. A 630 I think it was, same as what you're showing.
Posted by: lem150 on 2026-05-17 10:19:27
So it can be removed and a normal 040 could plug into it?
Posted by: Phipli on 2026-05-17 10:20:36
So it can be removed and a normal 040 could plug into it?
Yeah, should be. Can't tell you for 100% certainly because someone might always have done something weird, but that's what it looks like.
Posted by: Phipli on 2026-05-17 10:21:36
I'd keep it like that, it's quirky. Plus it's a 33MHz, so will certainly run at 40MHz, especially with a little heatsink.
Posted by: lem150 on 2026-05-17 10:21:37
Yeah, should be. Can't tell you for 100% certainly because someone might always have done something weird, but that's what it looks like.
Perfect I am looking for a 580/630 with the GIMO for a dos card
Posted by: lem150 on 2026-05-17 10:22:29
I'd keep it like that, it's quirky. Plus it's a 33MHz, so will certainly run at 40MHz, especially with a little heatsink.
Its for a DOS card project so I need it to come off and go onto the DOS card
Posted by: Phipli on 2026-05-17 10:24:20
Perfect I am looking for a 580/630 with the GIMO for a dos card
Ah yeah, that is the right board. You can tell by the extra holes as well as the second RAM slot :

1000035875.png

Its for a DOS card project so I need it to come off and go onto the DOS card
Ah fair, but you can still plug this quirky one back into the DOS card 🙂
Posted by: Phipli on 2026-05-17 10:27:39
Worst case you can desolder what's there and fit a socket.

But if you're super worried,I'd keep looking because that one is f-ing expensive.
Posted by: lem150 on 2026-05-17 10:31:33
Beats the one that's over 600 from the US on eBay right now 🙂
Posted by: Phipli on 2026-05-17 10:32:24
Beats the one that's over 600 from the US on eBay right now 🙂
Yeah, well, if that one is on a sporty tablecloth...
Posted by: lem150 on 2026-05-17 10:34:20
lol oh him 🙂
Posted by: croissantking on 2026-05-17 10:54:35
I have one of these, came with a 630 board as well. It’s just a QFP to PGA adapter and you can remove it from the socket. I swapped a full 040 onto mine and run it in an LC475.
Posted by: lem150 on 2026-05-17 10:56:07
Sounds good! Project is moving along, slowly, lol.

Its a 520 into a Tacky with a 580 to a 630 DOS 🙂
Posted by: Joopmac on 2026-05-18 12:52:27
Didn't mighty ZigZagJoe create a board like this also
Posted by: croissantking on 2026-05-18 12:54:17
Didn't mighty ZigZagJoe create a board like this also

Correct
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