Nice collection!

Now I only have 2 different 286s (and one spare), both are very late SIPP/SIMM with 20MHz models, wither with VLSI or Headland HT12 chipset. I had a Hedaka too which couldn't do 0WS, one slightly acid damaged 16MHz Headland with AMD CPU and some quirk that didn't let me use SIPPs in Bank0 and some aversion it developed against GUS cards after I had had it for a while. Oh, and a very strange 5170 clone that had a socketed 8MHz ceramic CPU that was apparently running at 6MHz. But it died on me so much that despite all my efforts I couldn't get it booting again 🙁

So I was left with the modern ones and I kept the cream of the crop that work well and had their batteries removed (mostly by me). At least the VLSI one has a socket so I can test PQFP CPUs in it. But the ceramic ones are still shrouded in mystery. Let alone the one PGA piece I have too...

I see that yours are soldered or PQFP socketed too. It's so hard to find working undamaged boards for older 286s...

Amazing! The 286 is a sort of thing that I haven't got a chance to tinker about.

Great collection - same things I like!

HanJammer wrote:

The one on the bottom (NEAT-16) is beyond repair.

What a pity... it's one of the nicest 286 board of all...

HanJammer wrote:

Also last one in the third row has some quirks.

It is an end-286 one. These small mobos with 20+MHz were aggressively sold as budget alternative in the early 386 age and usually of very poor quality.
They are funny in their own way, like the 14MHz all-in-one-chip 8088 clones that were cheapo alternative when the 8088's market share already almost became niche.

There were a few quality 20MHz boards too, but they are kind of rare.

nice big collection, it looks like some1 butchered the socket on the non working last board at the bottom, im curious most of the boards have batteries removed except like 3 that have the green barrel still attached

treeman wrote:

nice big collection, it looks like some1 butchered the socket on the non working last board at the bottom, im curious most of the boards have batteries removed except like 3 that have the green barrel still attached

Yup, fresh batteries I soldered in place of the old, desoldered ones. I simply used these boards in some builds I quickly dismantled. But it was before I started using external batteries, so I no longer use the onboard ones.

The big board with butchered socked also misses some chips and is badly warped (which is not visible on the photo). I bought it mostly for the DRAMs which I will transplant to other of these big boards.

I agree with the quality. Some of the small motherboards are of very poor quality and are ripoffs of other boards (for example one of the not working boards looks like Octek Fox II 286, but it has GW-286 markings and no mention of Octek at all). Also take notice of the Suntac 286P (four boards in the second row) - quality differs greatly, and there are some minor diffeences between each of these boards - the fourth one has most differences of the four)

HanJammer could You help me w suntac motherboard?
on Your picture first from right side, a have the one w damages 🙁
I'm looking for parameter of parts or very good quality of motherboard pictures:
- OSC 1 ........MHz?
- OSC 2 ....... MHz
- D3
-C7
- C17
- C30
- C50
- C62
- C83
- C84
- C94
- C95
- C96
- R7
- R18
- R44
- R46
- R47
- R60

thanks a lot if You could help me
regards

Which one exactly would it be?

Cezary wrote on 2020-08-04, 16:53:

HanJammer could You help me w suntac motherboard? on Your picture first from right side, a have the one w damages :( I'm lookin […]
Show full quote

HanJammer could You help me w suntac motherboard?
on Your picture first from right side, a have the one w damages 🙁
I'm looking for parameter of parts or very good quality of motherboard pictures:
- OSC 1 ........MHz?
- OSC 2 ....... MHz
- D3
-C7
- C17
- C30
- C50
- C62
- C83
- C84
- C94
- C95
- C96
- R7
- R18
- R44
- R46
- R47
- R60

thanks a lot if You could help me
regards

Those are some really nice boards. I have 4 286 boards and I have one in permanent use. I have a weak spot for anything 286 so I'll be following this thread.

Images of two of my boards:

I have *one* 286, big ass AST.

Probably being dissolved by an old battery, sigh...

The one in attachement 😀

Soo, which one is your favorite from the bunch ?

Cezary wrote on 2020-08-06, 15:18:

The one in attachement 😀

20Mhz, onboard I/O. Nice board!

Cezary wrote on 2020-08-06, 15:18:

The one in attachement 😀

This board is missing 40MHz oscillator, keyboard controller, EPROM with BIOS that's for sure. Not all capacitors and resistors are necessary (you would have to look on the backside to see if they were ever installed in the first place). They may be present on my motherboard, but were never populated on yours.

Generally other 2 unpopulated OSCs are for NPU and for ISA bus/FDD controller (necessary if you would want to run 25MHz 286).

I will try to take pics tomorrow...

nice board true 😀
but some repair needed 🙁
waiting for help from forum Users some parts parameters or high resolution photos of good one

Can I join the club with my IBM PS/2 model 30-286?

And with my ELT286B 160B?
http://www.uncreativelabs.de/th99/m/U-Z/30619.htm

(Sorry for not posting pics, I'm lazy today, 35'c / 95'F here)

I created this thread long time ago 🤣.
Since then my 286 motherboard collection got a bit out of hand, and now I wouldn't have a space on the floor to put them down the same way I did before 🤣.

I have the ELT286B yeah...

Cezary wrote on 2020-08-06, 15:18:

The one in attachement 😀

Here