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Suntac 80286 Mainboards

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Reply 140 of 150, by Predator99

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Next ones are 2 board from this lot:
Bought these (retro) hardware today

1st one is labeled "BAY 1000C" and comes with a Phoenix BIOS dated 04/20/88. I received it with the wire-fix, but it has still problems with the power supply and does not work. Maybe an easy fix.

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286-SUNTAC SA073155 IC23.rar
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286-SUNTAC BAY-1000C-.jpg
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286-SUNTAC BAY-1000C-.jpg
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The other one works perfectly and as far as I remember it looks exactly like the board that was installed in my 1st PC I worked so many years with:

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286-SUNTAC BAY-1000C-IC23.rar
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286-SUNTAC SA073155.jpg
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286-SUNTAC SA073155.jpg
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286-SUNTAC SA073155b.JPG
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286-SUNTAC SA073155b.JPG
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Reply 141 of 150, by Predator99

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Next 6 Suntac boards from this lot 😀
Re: Bought these (retro) hardware today

Already tested 3 and they are running 😀
4 of the boards share the same BIOS "AWARD 3.03 01".

Filename
SUNTAC Award 3.03 01.RAR
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1.71 MiB
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SUNTAC Award 3.03 01-A.JPG
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SUNTAC Award 3.03 01-A.JPG
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SUNTAC Award 3.03 01-B.JPG
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Reply 142 of 150, by Predator99

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SUNTAC_2019-09-A.jpg
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SUNTAC_2019-09-C.jpg
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SUNTAC_2019-09-C.jpg
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SUNTAC_2019-09-D.jpg
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SUNTAC_2019-09-E.jpg
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Reply 143 of 150, by Predator99

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This one has BIOS "Award 0N3.03 NFS" with a "DISK STEP RATE" option. This is new to me, related to the floppy..?

Filename
SUNTAC Award 0N3.03 NFS.RAR
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SUNTAC Award 0N3.03 NFS-A.JPG
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SUNTAC Award 0N3.03 NFS-A.JPG
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SUNTAC Award 0N3.03 NFS-B.JPG
Filename
SUNTAC Award 0N3.03 NFS-B.JPG
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SUNTAC_2019-09-B-NFS.jpg
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Reply 145 of 150, by dorkbert

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This looks like it is also laid out for 386sx. Stason indicates this is an Easy Data board.
Same board layout appeared under both 286 and 386 listing, with different "factory jumpers".
(I wonder if I can solder 386sx onto it and switch between 286 and 386sx)

s-l1600.jpg
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Reply 146 of 150, by suntac

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dorkbert wrote:
This looks like it is also laid out for 386sx. Stason indicates this is an Easy Data board. Same board layout appeared under bot […]
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This looks like it is also laid out for 386sx. Stason indicates this is an Easy Data board.
Same board layout appeared under both 286 and 386 listing, with different "factory jumpers".
(I wonder if I can solder 386sx onto it and switch between 286 and 386sx)

s-l1600.jpg

No, you can't. It's designed to be either a 286 or a 386SX.

Reply 147 of 150, by Predator99

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Next one from my Profex PC 33
Profex "PC 33" - Suntac 80286-12

IMG_7127.JPG
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IMG_7132.JPG
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IMG_7132.JPG
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Filename
ST62-PRO.rar
File size
19.93 KiB
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15 downloads
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(NSSI dump)

Reply 149 of 150, by Predator99

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Got another board which I spotted in a scrap lot. Only little part was visible on the bad seller photo. This is what I got.

IMG_9426r.jpg
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IMG_9426r.jpg
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It seems to be exactly the same one as this:
Re: Suntac 80286 Mainboards

Battery damage is severe, but after cleaning it does not look that bad anymore. No surprise its not working (Reset is on all the time), but at least I got a CPU and some RAMs...

IMG_9428r.jpg
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IMG_9428r.jpg
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Filename
286-SUNTAC-2806036.zip
File size
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5 downloads
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Reply 150 of 150, by Anonymous Coward

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dorkbert wrote on 2019-10-20, 12:58:
This looks like it is also laid out for 386sx. Stason indicates this is an Easy Data board. Same board layout appeared under bot […]
Show full quote

This looks like it is also laid out for 386sx. Stason indicates this is an Easy Data board.
Same board layout appeared under both 286 and 386 listing, with different "factory jumpers".
(I wonder if I can solder 386sx onto it and switch between 286 and 386sx)

s-l1600.jpg

I know I'm a little late to the party, but this board is pretty cool for a 286. It has a fairly well integrated chipset, but the board is still full length. PCB quality looks to be excellent. It has a Dallas clock chip, which probably saved the board from being eaten by battery acid. It has 8 SIMM slots, which is fairly rare on a 286. They usually have 4, if they have any at all.
As you've pointed out, this board can also be equipped for 386SX, which means at minimum this board will probably work at 20MHz reliably...so if you want to experiment with fast 286 CPUs, this board seems like a good candidate. I wonder if the 387 socket can be used with an 80286 in place.
...and something unusual is that the board uses square oscillators rather than rectangular ones.

What did you end up doing with this one?

"Will the highways on the internets become more few?" -Gee Dubya
V'Ger XT|Upgraded AT|Ultimate 386|Super VL/EISA 486|SMP VL/EISA Pentium